[continued from previous message]

* Apr 23 - Aten Asteroid 2017 HF1 Near-Earth Flyby (0.061 AU)
Apr 23 - Apollo Asteroid 2015 XF352 Near-Earth Flyby (0.090 AU)
Apr 23 - Asteroid 232 Russia Closest Approach To Earth (1.114 AU)
* Apr 23 - Asteroid 400796 Douglass Closest Approach To Earth (1.803 AU)
Apr 23 - Asteroid 19367 Pink Floyd Closest Approach To Earth (1.842 AU)
Apr 23 - Asteroid 6001 Thales Closest Approach To Earth (1.862 AU)
Apr 23 - Asteroid 5000 IAU Closest Approach To Earth (2.201 AU)
Apr 23 - Max Planck's 160th Birthday (1858)
Apr 24 - Moon Occults Regulus
Apr 24 - Asteroid 7986 Romania Closest Approach To Earth (0.969 AU)
Apr 24 - Kuiper Belt Object 42355 Typhon At Opposition (20.615 AU)
Apr 25 - Comet 169P/NEAT Closest Approach To Earth (1.604 AU)
Apr 25 - Comet 222P/LINEAR Closest Approach To Earth (2.885 AU)
Apr 25 - Comet 33P/Daniel At Opposition (3.393 AU)
Apr 25 - Comet P/2003 T12 (SOHO) At Opposition (3.582 AU)
Apr 25 - Comet C/2017 B3 (LINEAR) At Opposition (3.972 AU)
Apr 25 - Apollo Asteroid 4581 Asciepius Closest Approach To Earth (0.293 AU)
Apr 25 - Asteroid 3350 Scobee Closest Approach To Earth (1.441 AU)
Apr 25 - Asteroid 17023 Abbott Closest Approach To Earth (1.447 AU)
Apr 25 - Asteroid 6123 Aristoteles Closest Approach To Earth (1.449 AU)
Apr 25 - Asteroid 268242 Pebble Closest Approach To Earth (1.497 AU)
Apr 25 - Asteroid 827 Wolfiana Closest Approach To Earth (1.587 AU)
Apr 25 - Asteroid 21564 Widmanstatten Closest Approach To Earth (2.663 AU)
Apr 26 - Comet 334P/NEAT Closest Approach To Earth (3.583 AU)
Apr 26 - Comet C/2017 E3 (PANSTARRS) Closest Approach To Earth (5.356 AU)
Apr 26 - Amor Asteroid 450648 (2006 UC63) Near-Earth Flyby (0.082 AU)
Apr 26 - 20th Anniversary (1998), Cassini, Venus Flyby
Apr 26 - 25th Anniversary (1993), STS-55 Launch (Space Shuttle Columbia, Spacelab-D2)
Apr 26 - Anro Penzias' 85th Birthday (1933)
Apr 26 - 170th Anniversary (1848), Andrew Graham's Discovery of Asteroid 9 Metis
Apr 26 - 215th Anniversary (1803), L'Aigle Meteorite Shower (Hit House in France)
Apr 27 - Comet P/2011 CR42 (Catalina) At Opposition (1.539 AU)
Apr 27 - Comet 313P/Gibbs At Opposition (2.713 AU)
Apr 27 - Apollo Asteroid 444193 (2005 SE71) Near-Earth Flyby (0.062 AU)
Apr 27 - Amor Asteroid 194126 (2001 SG276) Near-Earth Flyby (0.084 AU)
* Apr 27 - Apollo Asteroid 5786 Talos Closest Approach To Earth (0.792 AU)
Apr 27 - Asteroid 3773 Smithsonian Closest Approach To Earth (1.424 AU)
Apr 27 - Asteroid 8146 Jimbell Closest Approach To Earth (1.955 AU)
Apr 27 - Philip Abelson's 105th Birthday (1913)
Apr 28 - Moon Occults Asteroid 21 Lutetia
Apr 28 - Comet P/2017 B4 (PANSTARRS) Closest Approach To Earth (2.914 AU)
Apr 28 - Comet 202P/Scotti At Opposition (3.199 AU)
Apr 28 - Comet 191P/McNaught At Opposition (3.968 AU)
Apr 28 - Comet P/2008 WZ96 (LINEAR) At Opposition (4.122 AU)
Apr 28 - Asteroid 1818 Brahms Closest Approach To Earth (1.252 AU)
Apr 28 - Asteroid 16481 Thames Closest Approach To Earth (2.134 AU)
Apr 28 - 15th Anniversary (2003), Galaxy Evolution Explorer (GALEX) Launch
Apr 28 - Eugene Shoemaker's 90th Birthday (1928)
Apr 28 - Eberhard Rees' 110th Birthday (1908)
Apr 29 - Mercury At Its Greatest Western Elongation (27 Degrees)
Apr 29 - Comet 45P/Honda-Mrkos-Pajdusakov At Oppositon (3.554 AU)
Apr 29 - Comet P/2017 D4 (PANSTARRS) At Opposition (4.139 AU)
* Apr 29 - Comet C/2017 K1 (PANSTARRS) Closest Approach To Earth (6.306 AU)
Apr 29 - Apollo Asteroid 2013 US3 Near-Earth Flyby (0.026 AU)
Apr 29 - Aten Asteroid 2002 JR100 Near-Earth Flyby (0.028 AU)
Apr 29 - Asteroid 4659 Roddenberry Closest Approach To Earth (1.877 AU)
Apr 29 - Asteroid 2700 Baikonur Closest Approach To Earth (1.980 AU)
Apr 29 - Asteroid 4749 Ledzepplin Closest Approach To Earth (2.313 AU)
Apr 29 - Asteroid 5870 Baltimore Closest Approach To Earth (2.947 AU)
Apr 29 - Nikolai Budarin's 65th Birthday (1953)
Apr 29 - Harold Urey's 125th Birthday (1893)
Apr 30 - Moon Occults Asteroid 16 Psyche
Apr 30 - Comet 169P/NEAT Perihelion (0.604 AU)
* Apr 30 - Comet C/2017 K1 (PANSTARRS) At Opposition (6.306 AU)
Apr 30 - Comet C/2015 XY1 (Lemmon) Perihelion (7.928 AU)
Apr 30 - Asteroid 42981 Jenniskens Closest Approach To Earth (1.176 AU)
Apr 30 - Asteroid 2801 Huygens Closest Approach To Earth (2.080 AU)
Apr 30 - Kuiper Belt Object 2014 FC69 At Opposition (83.812 AU)

May 2018
May ?? - SpX-DM2 Falcon 9 Launch (Internationl Space Station)
* May ?? - Chang'e 4/DSLWP-A1 & A2 CZ-4C Launch (L2 Halo Orbit Mission)
May ?? - GPS 3A-2 Falcon 9 Launch
May ?? - BeiDou-3 (M13 & M14) CZ-3C/YZ-1 Launch
May ?? - Edward Cooper's 220th Birthday (1798)
May 01 - Comet P/2011 CR42 (Catalina) Closest Approach To Earth (1.537 AU)
May 01 - Comet 330P/Catalina At Opposition (4.022 AU)
May 01 - Asteroid 4330 Vivaldi Closest Approach To Earth (1.319 AU)
May 01 - Asteroid 9885 Linux Closest Approach To Earth (1.448 AU)
May 01 - Asteroid 5471 Tunguska Closest Approach To Earth (1.879 AU)
May 01 - Asteroid 51828 Ilanramon Closest Approach To Earth (2.010 AU)
May 01 - Asteroid 13688 Oklahoma Closest Approach To Earth (2.133 AU)
May 01 - Asteroid 9860 Archaeopteryx Closest Approach To Earth (2.144 AU)
May 01 - 20th Anniversary (1998), Discovery of Dar al Gani 476 Meteorite in Sahara Desert (Mars Meteorite)
May 02 - Comet 169P/NEAT At Opposition (1.609 AU)
May 02 - Comet 334P/NEAT At Opposition (3.588 AU)
May 02 - Asteroid 4047 Chang'E Closest Approach To Earth (1.851 AU)
May 02 - Asteroid 16626 Thumper Closest Approach To Earth (1.927 AU)
May 02 - Asteroid 2099 Opik Closest Approach To Earth (2.042 AU)
May 02 - Kuiper Belt Object 2010 EK139 At Opposition (35.418 AU)
May 02 - Robert Wood's 150th Birthday (1868)
May 03 - Comet 164P/Christensen At Opposition (2.700 AU)
May 03 - Comet 313P/Gibbs Closest Approach To Earth (2.708 AU)
May 03 - Comet C/2017 E3 (PANSTARRS) At Opposition (5.364 AU)
May 03 - Amor Asteroid 2015 JP Near-Earth Flyby (0.097 AU)
May 03 - Asteroid 10866 Peru Closest Approach To Earth (1.193 AU)
May 03 - Asteroid 4122 Ferrari Closest Approach To Earth (1.443 AU)
May 03 - Asteroid 9134 Encke Closest Approach To Earth (1.908 AU)
May 03 - Asteroid 3325 TARDIS Closest Approach To Earth (2.176 AU)
May 03 - Asteroid 13677 Alvin Closest Approach To Earth (2.371 AU)
May 03 - Asteroid 13897 Vesuvius Closest Approach To Earth (2.956 AU)
May 03 - Steven Weinberg's 85th Birthday (1933)
May 03 - Ernst Hartwig's 95th Birthday (1923)
May 04 - Space Day
May 04 - Star Wars Day
May 04 - Comet 37P/Forbes Perihelion (1.610 AU)
May 04 - Comet 30P/Reinmuth At Opposition (1.816 AU)
May 04 - Asteroid 8299 Tealeoni Closest Approach To Earth (0.957 AU)
May 04 - Asteroid 17898 Scottsheppard Closest Approach To Earth (1.101 AU)
May 04 - Jean-Charles de Borda's 285th Birthday (1733)
May 04 - Jean-Philippe de Cheseaux's 300th Birthday (1718)
May 05 - InSight/Mars Cube One 1 & 2 Atlas 5 Launch (Mars Lander)
May 05 - National Astronaut Day
May 05 - Eta Aquarids Meteor Shower Peak
May 05 - Asteroid 9342 Carygrant Closest Approach To Earth (1.586 AU)
May 05 - Asteroid 12846 Fullerton Closest Approach To Earth (2.093 AU)
May 05 - Albert Marth's 190th Birthday (1828)
May 06 - Comet 107P/Wilson-Harrington Closest Approach To Earth (1.688 AU)
May 06 - Comet 304P/Ory At Opposition (3.926 AU)
May 06 - Apollo Asteroid 1685 Toro Closest Approach To Earth (0.972 AU)
May 06 - Asteroid 4433 Goldstone Closest Approach To Earth (1.499 AU)
May 06 - Asteroid 8283 Edinburgh Closest Approach To Earth (2.035 AU)
May 06 - Asteroid 2476 Andersen Closest Approach To Earth (2.210 AU)
May 06 - Carl Hergenrother's 45th Birthday (1973)
May 06 - Grove Gilbert's 175th Birthday (1843)
May 07 - Comet 143P/Kowal-Mrkos Perihelion (2.532 AU)
May 07 - Comet P/2000 R2 (LINEAR) Closest Approach To Earth (2.591 AU)
May 07 - Comet 350P/McNaught Closest Approach To Earth (2.753 AU)
May 07 - Comet 350P/McNaught At Opposition (2.753 AU)
* May 07 - Comet C/2016 S1 (PANSTARRS) At Opposition (3.266 AU)
May 07 - Comet C/2017 A1 (PANSTARRS) At Opposition (3.787 AU)
May 07 - Apollo Asteroid 1999 FN19 Near-Earth Flyby (0.025 AU)
May 07 - Apollo Asteroid 11311 Peleus Closest Approach To Earth (1.743 AU)
May 07 - Kuiper Belt Object 2010 FX86 At Opposition (45.160 AU)
May 08 - Comet 253P/PANSTARRS Perihelion (2.037 AU)
May 08 - Comet 254P/McNaught At Opposition (4.181 AU)
May 08 - Apollo Asteroid 2016 JQ5 Near-Earth Flyby (0.016 AU)
May 08 - Asteroid 2709 Sagan Closest Approach To Earth (1.064 AU)
May 08 - Asteroid 16857 Goodall Closest Approach To Earth (1.622 AU)
May 08 - Apollo Asteroid 3103 Eger Closest Approach To Earth (1.753 AU)
May 08 - Centaur Object 144908 (2004 YH32) At Opposition (11.685 AU)
May 09 - Jupiter At Opposition
May 09 - Comet C/2016 R2 (PANSTARRS) Perihelion (2.602 AU)
May 09 - Comet 348P/PANSTARRS Closest Approach To Earth (2.870 AU)
May 09 - Comet P/1999 RO28 (LONEOS) At Opposition (2.929 AU)
May 09 - Apollo Asteroid 388945 (2008 TZ3) Near-Earth Flyby (0.017 AU)
May 09 - Asteroid 12397 Peterbrown Closest Approach To Earth (1.951 AU)
May 09 - Asteroid 19155 Lifeson Closest Approach To Earth (2.024 AU)
May 09 - Asteroid 12760 Maxwell Closest Approach To Earth (2.136 AU)
May 09 - 15th Anniversary (2003), Hayabusa Launch (Japan Asteroid Sample Return Mission)
May 10 - Comet P/2017 B4 (PANSTARRS) At Opposition (2.933 AU)
May 10 - Comet 260P/McNaught At Opposition (3.169 AU)
May 10 - Comet 230P/LINEAR At Opposition (4.175 AU)
May 10 - Asteroid 1501 Baade Closest Appraoch To Earth (2.112 AU)
May 10 - Asteroid 9357 Venezuela Closest Approach To Earth (2.100 AU)
May 10 - Kuiper Belt Object 90568 (2004 GV9) At Opposition (38.560 AU)
May 10 - Augustin-Jean Frensel's 230th Birthday (1788)
May 11 - Comet 255P/Levy Closest Approach To Earth (2.658 AU)
May 11 - Richard Feynman's 100th Birthday (1918)
May 12 - Mercury Passes 2.4 Degrees From Uranus
May 12 - Comet 168P/Hergenrother At Opposition (3.043 AU)
May 12 - Comet 322P/SOHO At Opposition (3.605 AU)
May 12 - Asteroid 128523 Johnmuir Closest Approach To Earth (1.774 AU)
May 12 - Asteroid 15495 Bogie Closest Approach To Earth (2.117 AU)
May 12 - John Hind's 195th Birthday (1823)
May 13 - Asteroid 2874 Jim Young Closest Approach To Earth (1.531 AU)
May 13 - Asteroid 6336 Dodo Closest Approach To Earth (1.674 AU)
May 13 - Asteroid 16 Psyche Closest Approach To Earth (2.234 AU)
May 13 - Alexis-Claude Clairaut's 305th Birthday (1713)
May 14 - Comet 227P/Catalina-LINEAR Closest Approach To Earth (2.152 AU)
May 14 - Comet 348P/PANSTARRS At Opposition (2.874 AU)
May 14 - Comet 113P/Spitaler At Opposition (4.203 AU)
May 14 - Asteroid 4017 Disneya Closest Approach To Earth (1.663 AU)
May 14 - Asteroid 4255 Spacewatch Closest Approach To Earth (2.417 AU)
May 14 - Asteroid 580 Selene Closest Approach To Earth (2.470 AU)
May 14 - 45th Anniversary (1973), Skylab Launch
May 15 - Comet P/2012 O1 (McNaught) Closest Approach To Earth (2.111 AU)
May 15 - Comet C/2013 C2 (Tenagra) Closest Approach To Earth (8.818 AU)
May 15 - Aten Asteroid 1999 LK1 Near-Earth Flyby (0.034 AU)
May 15 - Apollo Asteroid 101955 Bennu Closest Approach To Earth (0.352 AU)
May 15 - Asteroid 42998 Malinafrank Closest Approach To Earth (1.226 AU)
May 15 - Asteroid 5535 Annefrank Closest Approach To Earth (1.237 AU)
May 15 - Asteroid 2045 Peking Closest Approach To Earth (1.255 AU)
May 15 - Asteroid 90388 Philchristensen Closest Approach To Earth (1.717 AU)
May 15 - Asteroid 203 Pompeja Closest Approach To Earth (1.886 AU)
May 15 - Asteroid 5281 Lindstrom Closest Approach To Earth (2.319 AU)
May 15 - Neptune Trojan 2010 TS191 At Opposition (29.677 AU)
May 15 - 55th Anniversary (1963), Mercury 9 Launch (Gordon Cooper)
May 15 - Nicolas-Louis de Lacaille's 305th Birthtday (1713)
May 16 - Moon Occults Aldebaran
May 16 - Comet 331P/Gibbs At Opposition (2.113 AU)
May 16 - Comet 240P/NEAT Perihelion (2.134 AU)
May 16 - Comet 43P/Wolf-Harrington At Opposition (3.589 AU)
May 16 - Apollo Asteroid 2015 KJ19 Near-Earth Flyby (0.061 AU)
May 16 - Apollo Asteroid 2012 WS3 Near-Earth Flyby (0.095 AU)
May 16 - Asteroid 70713 Sethmacfarlane Closest Approach To Earth (1.654 AU)
May 16 - Kuiper Belt Object 65407 (2002 RP120) At Opposition (29.547 AU)
May 17 - Comet 263P/Gibbs Closest Approach To Earth (1.658 AU)
May 17 - Comet 331P/Gibbs Closest Approach To Earth (2.113 AU)
May 17 - Comet 11P/Tempel-Swift-LINEAR At Opposition (4.129 AU)
May 17 - Asteroid 439 Ohio Closest Approach To Earth (2.325 AU)
May 18 - Comet 66P/du Toit Closest Approach To Earth (0.896 AU)
May 18 - Comet P/2000 S4 (LINEAR-Spacewatch) At Opposition (3.748 AU)
May 18 - Asteroid 4221 Picasso Closest Approach To Earth (1.330 AU)
May 18 - Asteroid 6714 Montreal Closest Approach To Earth (1.655 AU)
May 18 - Asteroid 3780 Maury Closest Approach To Earth (1.823 AU)
May 18 - Asteroid 7749 Jackschmitt Closest Approach To Earth (1.833 AU)
May 18 - Asteroid 2169 Taiwan Closest Approach To Earth (1.909 AU)
May 18 - Asteroid 78453 Bullock Closest Approach To Earth (2.049 AU)
May 18 - Kuiper Belt Object 2015 KH162 At Opposition (58.714 AU)
May 18 - 30th Anniversary (1988), Torino Meteorite Fall (Hit Building in Italy)
May 18 - 65th Anniveray (1953), Jacqueline Cochran Becomes 1st Woman to Break Sound Barrier
May 18 - Richard Tousey's 110th Birthday (1908)
May 18 - Omar Khayyam's 970th Birthday (1048)
May 19 - Comet 66P/du Toit Perihelion (1.290 AU)
May 19 - Comet P/2010 H2 (Vales) Closest Approach To Earth (2.256 AU)
May 19 - Comet P/2014 U2 (Kowalski) At Opposition (3.028 AU)
May 19 - Comet 120P/Mueller At Opposition (4.235 AU)
May 19 - Comet C/2013 C2 (Tenagra) At Opposition (8.820 AU)
May 19 - Asteroid 128036 Rafaelnadal Closest Approach To Earth (0.885 AU)
May 19 - Asteroid 6469 Armstrong Closest Approach To Earth (1.055 AU)
May 19 - Asteroid 224693 Morganfreeman Closest Approach To Earth (1.818 AU)
May 19 - Asteroid 2104 Toronto Closest Approach To Earth (1.929 AU)
May 19 - Asteroid 10377 Kilimanjaro Closest Approach To Earth (2.621 AU)
May 19 - John Hayford's 150th Birthday (1868)
May 20 - Comet 118P/Shoemaker-Levy At Opposition (3.363 AU)
May 20 - Comet 84P/Giclas At Opposition (3.775 AU)
May 20 - Apollo Asteroid 24761 Ahau Closest Approach To Earth (0.867 AU)
May 20 - Asteroid 15318 Innsbrook Closest Approach To Earth (1.156 AU)
May 20 - Asteroid 472 Roma Closest Approach To Earth (1.821 AU)
May 20 - Asteroid 3623 Chaplin Closest Approach To Earth (1.934 AU)
May 20 - Asteroid 8657 Cedrus Closest Approach To Earth (2.023 AU)
May 20 - 30th Anniversary (1978), Pioneer Venus 1 Launch
May 21 - Asteroid 4104 Alu Closest Approach To Earth (1.367 AU)
May 21 - Asteroid 8734 Warner Closest Approach To Earth (1.975 AU)
May 21 - Glenn Curtiss' 140th Birthday (1878)
May 22 - Mars Autumnal Equinox
May 22 - Comet 215P/NEAT At Opposition (3.056 AU)
May 22 - Asteroid 9949 Brontosaurus Closest Approach To Earth (1.230 AU)
May 22 - Asteroid 16682 Donati Closest Approach To Earth (1.325 AU)
May 22 - Asteroid 1541 Estonia Closest Approach To Earth (1.623 AU)
May 22 - David Levy's 70th Birthday (1948)
May 22 - 110th Anniversary (1808), Stannern Meteorite Fall in Czechoslovakia
May 23 - Comet 24P/Schaumasse At Opposition (1.454 AU)
May 23 - Comet P/2010 H2 (Vales) At Opposition (2.259 AU)
May 23 - Comet 159P/LONEOS Perihelion (3.625 AU)
May 23 - Comet 104P/Kowal At Opposition (4.057 AU)
May 23 - Apollo Asteroid 2016 WL7 Near-Earth Flyby (0.080 AU)
May 23 - Asteroid 1284 Latvia Closest Approach To Earth (2.104 AU)
May 23 - Thomas Reiter's 60th Birthday (1958)
May 24 - Comet 107P/Wilson-Harrington Perihelion (0.970 AU)
* May 24 - Asteroid 337044 Bobdylan Closest Approach To Earth (1.467 AU)
May 24 - Asteroid 30444 Shemp Closest Approach To Earth (1.845 AU)
May 25 - Towel Day - Annual Tribute to Douglas Adams
May 25 - Comet 5D/Brorsen Closest Approach To Earth (2.295 AU)
May 25 - Comet P/2012 SB6 (Lemmon) At Opposition (3.601 AU)
May 25 - Comet P/2011 U2 (Bressi) At Opposition (4.583 AU)
May 25 - Asteroid 17059 Elvis Closest Approach To Earth (1.553 AU)
May 25 - Asteroid 157064 Sedona Closest Approach To Earth (2.104 AU)
May 25 - 10th Anniversary (2008), Phoenix, Mars Landing
May 26 - Comet 234P/LINEAR Closest Approach To Earth (2.354 AU)
May 26 - Comet 187P/LINEAR Closest Approach To Earth (2.888 AU)
* May 26 - Comet 187P/LINEAR At Opposition (2.888 AU)
May 26 - Comet P/2011 U2 (Bressi) Closest Approach To Earth (4.583 AU)
* May 26 - Apollo Asteroid 2017 LF Near-Earth Flyby (0.084 AU)
May 26 - Asteroid 5738 Billpickering Closest Approach To Earth (2.119 AU)
May 26 - Plutino 2006 HJ123 At Opposition (33.096 AU)
May 27 - Moon Occults Asteroid 16 Psyche
May 27 - Comet 255P/Levy At Opposition (2.698 AU)
May 27 - Comet P/2017 G2 (PANSTARRS) Closest Approach To Earth (2.954 AU)
May 27 - Comet 315P/LONEOS At Opposition (3.368 AU)
* May 27 - Comet 187P/LINEAR Perihelion (3.881 AU)
May 27 - Aten Asteroid 66391 (1999 KW4) Near-Earth Flyby (0.078 AU)
May 27 - Asteroid 11335 Santiago Closest Approach To Earth (1.456 AU)
May 27 - Asteroid 2197 Shanghai Closest Approach To Earth (2.302 AU)
May 27 - Plutino 38628 Huya At Opposition (27.633 AU)
May 27 - Alexander Volkov's 70th Birthday (1948)
May 28 - Comet P/1999 RO28 (LONEOS) Closest Approach To Earth (2.877 AU)
May 28 - Comet C/2015 VL62 Closest Approach To Earth (2.895 AU)
May 28 - Comet 215P/NEAT Closest Approach To Earth (3.051 AU)
May 28 - Comet 157P/Tritton At Opposition (3.884 AU)
May 28 - Asteroid 17744 Jodiefoster Closest Approach To Earth (1.376 AU)
May 28 - Asteroid 6117 Brevardastro Closest Approach To Earth (1.478 AU)
May 28 - Asteroid 4099 Wiggins Closest Approach To Earth (1.803 AU)
May 28 - Asteroid 2044 Wirt Closest Approach To Earth (1.997 AU)
May 28 - Asteroid 1042 Amazone Closest Approach To Earth (2.273 AU)
May 29 - Aten Asteroid 68347 (2001 KB67) Near-Earth Flyby (0.024 AU)
May 29 - Apollo Asteroid 2014 WG365 Near-Earth Flyby (0.061 AU)
May 29 - Asteroid 3131 Mason-Dixon Closest Approach To Earth (1.832 AU)
May 30 - Soyuz MS-9 Soyuz-FG Launch (International Space Station 55S)
May 30 - Comet P/2008 T4 (Hill) Perihelion (2.527 AU)
May 30 - Comet C/2017 B3 (LINEAR) Closest Approach To Earth (3.873 AU)
May 30 - Comet 144P/Kushida At Opposition (3.888 AU)
May 30 - Asteroid 12325 Bogota Closest Approach To Earth (1.353 AU)
May 30 - Neptune Trojan 2010 TT191 At Opposition (33.184 AU)
May 30 - Michael Lopez-Alegria's 60th Birthday (1958)
May 30 - Hannes Alfven's 100th Birthday (1908)
May 30 - Raymond Dugan's 140th Birthday (1878)
May 31 - Comet 164P/Christensen Perihelion (1.685 AU)
May 31 - Comet 227P/Catalina-LINEAR At Opposition (2.195 AU)
May 31 - Amor Asteroid 2013 LE7 Near-Earth Flyby (0.046 AU)
May 31 - Asteroid 5891 Gehrig Closest Approach To Earth (1.724 AU)
May 31 - Asteroid 13599 Lisbon Closest Approach To Earth (1.896 AU)
May 31 - Asteroid 24102 Jacquecassini Closest Approach To Earth (1.913 AU)
May 31 - Asteroid 589 Croatia Closest Approach To Earth (2.250 AU)
May 31 - Kuiper Belt Object 2007 JH43 At Opposition (39.551 AU)
May 31 - 10th Anniversary (2008), STS-124 Launch (Space Shuttle Discovery, International Space Station)
May 31 - 20th Anniversary (1998), Galileo, Europa 15 Flyby

June 2018
* Jun ?? - Crew Space Transportation 100 (CST-100) Atlas 5 Launch (Unmanned)
* Jun ?? - ICESAT 2/ELFIN/IT-SPINS/CHEFsat Delta 2 7420 Launch
* Jun ?? - AEHF-5 Atlas 5 Launch
* Jun ?? - Iridium Next 71-75/ GRACE-FO 1 & 2 Falcon 9 Launch
* Jun ?? - Telkom 4 Falcon 9 Launch
* Jun 01 - Comet 168P/Hergenrother Closest Approach To Earth (2.988 AU)
* Jun 01 - Asteroid 8837 London Closest Approach To Earth (0.982 AU)
* Jun 01 - Asteroid 61342 Lovejoy Closest Approach To Earth (1.163 AU)
* Jun 01 - Georgy Dobrovolsky's 90th birthday (1928)
* Jun 01 - Geminiano Montanari's 385th Birthday (1633)
* Jun 02 - Comet 261P/Larson At Opposition (2.265 AU)
* Jun 02 - Comet 96P/Machholz Closest Approach To Earth (2.397 AU)
* Jun 02 - Comet 178P/Hug-Bell At Opposition (3.780 AU)
* Jun 02 - Apollo Asteroid 2016 XF Near-Earth Flyby (0.077 AU)
* Jun 02 - Asteroid 16421 Roadrunner Closest Approach To Earth (0.981 AU)
* Jun 02 - Asteroid 5860 Deankootz Closest Approach To Earth (1.827 AU)
* Jun 02 - Asteroid 243 Ida Closest Approach To Earth (1.966 AU)
* Jun 02 - Asteroid 2191 Uppsala Closest Approach To Earth (2.254 AU)
* Jun 02 - 15th Anniversary (2003), Mars Express/ Beagle 2 Launch
* Jun 02 - 20th Anniversary (1998), STS-91 Launch (Space Shuttle Discovery, Mir Space Station)
* Jun 02 - 35th Anniversary (1983), Venera 15 Launch (USSR Venus Orbiter)
* Jun 02 - 160th Anniversary (1858), Discovery of Donati's Comet
* Jun 03 - Comet P/2015 X6 (PANSTARRS) Closest Approach To Earth (2.212 AU)
* Jun 03 - Comet P/2015 X6 (PANSTARRS) At Opposition (2.212 AU)
* Jun 03 - Comet 234P/LINEAR At Opposition (2.362 AU)
* Jun 03 - Apollo Asteroid 4257 Ubasti Closest Approach To Earth (1.751 AU)
* Jun 03 - 5th Anniversary (2013), Discovery of Rings Around Chariklo
* Jun 04 - Asteroid 16035 Sasandford Closest Approach To Earth (1.589 AU)
* Jun 04 - Asteroid 2825 Crosby Closest Approach To Earth (1.592 AU)
* Jun 04 - Asteroid 17656 Hayabusa Closest Approach To Earth (1.686 AU)
* Jun 04 - Asteroid 10189 Normanrockwell Closest Approach To Earth (1.794 AU)
* Jun 04 - Asteroid 49272 Bryce Canyon Closest Approach To Earth (2.206 AU)
* Jun 04 - Asteroid 284891 Kona Closest Approach To Earth (2.744 AU)
* Jun 04 - Kuiper Belt Object 278361 (2007 JJ43) At Opposition (39.991 AU)
* Jun 04 - John Grigg's 180th Birthday (1838)
* Jun 05 - Apollo Asteroid 2004 LB Near-Earth Flyby (0.092 AU)
* Jun 05 - Apollo Asteroid 11885 Summanus Closest Approach To Earth (1.326 AU) * Jun 05 - Asteroid 5102 Benfranklin Closest Approach To Earth (2.007 AU)
* Jun 05 - Asteroid 17427 Poe Closest Approach To Earth (2.913 AU)
* Jun 05 - Sydney Observatory's 160th Birthday (1858)
* Jun 06 - Asteroid 23990 Springsteen Closest Approach To Earth (1.260 AU)
* Jun 06 - Asteroid 2829 Bobhope Closest Approach To Earth (1.715 AU)
* Jun 06 - Asteroid 9533 Aleksejleonov Closest Approach To Earth (2.008 AU)
* Jun 06 - 35th Anniversary (1983), Venera 16 Launch (USSR Venus Orbiter)
* Jun 07 - Aten Asteroid 2017 EH1 Near-Earth Flyby (0.096 AU)
* Jun 07 - Asteroid 2955 Newburn Closest Approach To Earth (0.920 AU)
* Jun 07 - Asteroid 1718 Namibia Closest Approach To Earth (1.183 AU)
* Jun 07 - Asteroid 4535 Adamcarolla Closest Approach To Earth (1.354 AU)
* Jun 07 - Asteroid 83360 Catalina Closest Approach To Earth (1.696 AU3)
* Jun 07 - Bernard Burke's 90th Birthday (1928)
* Jun 07 - 265th Anniversary (1753), British Museum Founded
* Jun 08 - World Oceans Day
* Jun 08 - Comet 212P/NEAT At Opposition (3.758 AU)
* Jun 08 - Comet P/2016 WM48 (Lemmon) At Opposition (3.852 AU)
* Jun 08 - Asteroid 881 Athene Closest Approach To Earth (1.342 AU)
* Jun 08 - Asteroid 20403 Attenborough Closest Approach To Earth (2.218 AU)
* Jun 08 - Kuiper Belt Object 2010 KZ39 At Opposition (45.036 AU)
* Jun 08 - 100th Anniversary (1918), Discovery of Nova Aquila
* Jun 09 - Comet P/2012 TK8 (Tenagra) At Opposition (4.125 AU)
* Jun 09 - Apollo Asteroid 4660 Nereus Closest Approach To Earth (1.743 AU)
* Jun 09 - Asteroid 130 Elektra Closest Approach To Earth (2.559 AU)
* Jun 09 - Asteroid 2069 Hubble Closest Approach To Earth (2.587 AU)
* Jun 10 - Comet 263P/Gibbs At Opposition (1.732 AU)
* Jun 10 - Comet P/2001 T3 (NEAT) Perihelion (2.485 AU)
* Jun 10 - Comet C/2015 VL62 At Opposition (2.940 AU)
* Jun 10 - Asteroid 6827 Wombat Closest Approach To Earth (2.020 AU)
* Jun 10 - Asteroid 26733 Nanavistor Closest Approach To Earth (1.367 AU)
* Jun 10 - 15th Anniversary (2003), Mars Exploration Rover A (Spirit) Launch
* Jun 10 - 45th Anniversary (1973), Explorer 49 Launch (Moon Orbiter)
* Jun 11 - Comet P/2007 T2 (Kowalski) Closest Approach To Earth (0.502 AU)
* Jun 11 - Comet P/2017 G2 (PANSTARRS) At Opposition (2.990 AU)
* Jun 11 - Amor Asteroid 2015 DP155 Near-Earth Flyby (0.023 AU)
* Jun 11 - Apollo Asteroid 2008 LA Near-Earth Flyby (0.071 AU)
* Jun 11 - Neptune Trojan 2013 KY18 At Opposition (29.046 AU)
* Jun 11 - Kuiper Belt Object 174567 Varda At Opposition (45.762 AU)
* Jun 11 - 5th Anniversary (2013), Shenzhou 10 CZ-2F/H Launch (Chinese Manned Launch to Tian Gong1 1 Space Station)
* Jun 11 - 70th Anniversary (1948), V-2 Blossom Launch (Carried Albert I the Rhesus Monkey)
* Jun 11 - Johann Georg Palitzsch's 295th Birthday (1723)
* Jun 12 - Asteroid 770 Bali Closest Approach To Earth (1.521 AU)
* Jun 12 - Asteroid 14593 Everett Closest Approach To Earth (1.596 AU)
* Jun 12 - Asteroid 1241 Dysona Closest Approach To Earth (1.980 AU)
* Jun 12 - Asteroid 70715 Allancheuvront Closest Approach To Earth (2.026 AU)
* Jun 12 - David Gill's 175th Birthday (1843)
* Jun 13 - Comet P/2010 A2 (LINEAR) Closest Approach To Earth (1.559 AU)
* Jun 13 - Comet P/2010 A2 (LINEAR) At Opposition (1.559 AU)
* Jun 13 - Comet 182P/LONEOS Closest Approach To Earth (2.859 AU)
* Jun 13 - Asteroid 3720 Hokkaido Closest Approach To Earth (1.091 AU)
* Jun 13 - Asteroid 4987 Flamsteed Closest Approach To Earth (1.146 AU)
* Jun 13 - 20th Anniversary (1998), Portales Valley Meteorite Fall (Hit Barn in New Mexico)
* Jun 13 - Willard Bennett's 115th Birthday (1903)
* Jun 13 - Alan Griffith's 125th Birthday (1893)
* Jun 13 - Reinhold Tiling's 125th Birthday (1893)
* Jun 13 - Thomas Young's 245th Birthday (1773)
* Jun 14 - Comet 112P/Urata-Niijima At Opposition (3.604 AU)
* Jun 14 - Comet 204P/LINEAR-NEAT At Opposition (4.051 AU)
* Jun 14 - Asteroid 8277 Machu-Picchu Closest Approach To Earth (1.417 AU)
* Jun 14 - Asteroid 7220 Philnicholson Closest Approach To Earth (1.532 AU)
* Jun 14 - Asteroid 4808 Ballaero Closest Approach To Earth (2.091 AU)
* Jun 14 - 50th Anniversary (1968), 1st Asteroid Observed by Radar (1566 Icarus)
* Jun 15 - Aten Asteroid 2004 LO2 Near-Earth Flyby (0.064 AU)
* Jun 15 - Asteroid 6600 Qwerty Closest Approach To Earth (1.515 AU)
* Jun 15 - Asteroid 8250 Cornell Closest Approach To Earth (1.794 AU)
* Jun 15 - Hubertus Strughold's 120th Birthday (1898)
* Jun 16 - Aten Asteroid 469737 (2005 NW44) Near-Earth Flyby (0.055 AU)
* Jun 16 - Aten Asteroid 2014 GQ17 Near-Earth Flyby (0.086 AU)
* Jun 16 - Asteroid 46686 Anitasohus Closest Approach To Earth (1.211 AU)
* Jun 16 - Apollo Asteroid 162173 Ryugu Closest Approach To Earth (1.897 AU)
* Jun 16 - Amor Asteroid 3199 Nefertiti Closest Approach To Earth (1.912 AU)
* Jun 16 - Asteroid 2000 Herschel Closest Approach To Earth (2.053 AU)
* Jun 16 - Asteroid 2118 Flagstaff Closest Approach To Earth (2.082 AU)
* Jun 16 - Asteroid 1213 Algeria Closest Approach To Earth (2.285 AU)
* Jun 16 - 55th Anniversary (1963), 1st Woman In Space (Valentina Tereshkova)
* Jun 16 - 80th Anniversary (1938), Pantar Meteorite Fall (Hit Buildings in Philippine Islands)
* Jun 16 - Alexander Friedmann's 130th Birthday (1888)
* Jun 17 - Comet 261P/Larson Closest Approach To Earth (2.233 AU)
* Jun 17 - Asteroid 5231 Verne Closest Approach To Earth (1.926 AU)
* Jun 17 - Asteroid 13010 Germantitov Closest Approach To Earth (2.464 AU)
* Jun 17 - Asteroid 10063 Erinleeryan Closest Approach To Earth (2.962 AU)
* Jun 17 - James Elliot's 75th Birthday (1943)
* Jun 18 - Comet 5D/Brorsen At Opposition (2.385 AU)
* Jun 18 - Asteroid 896 Sphinx Closest Approach To Earth (0.902 AU)
* Jun 18 - Asteroid 797 Montana Closest Approach To Earth (1.404 AU)
* Jun 18 - Asteroid 6442 Salzburg Closest Approach To Earth (1.562 AU)
* Jun 18 - Asteroid 4372 Quincy Closest Approach To Earth (2.105 AU)
* Jun 18 - Asteroid 2421 Nininger Closest Approach To Earth (2.219 AU)
* Jun 18 - Plutino 28978 Ixion At Opposition (38.457 AU)
* Jun 18 - 35th Anniversary (1983), 1st US Woman In Space (Sally Ride)
* Jun 19 - Comet P/2002 EJ57 (LINEAR) Perihelion (2.627 AU)
* Jun 19 - Asteroid 3875 Staehle Closest Approach To Earth (0.939 AU)
* Jun 19 - Asteroid 4 Vesta Closest Approach To Earth (1.140 AU)
* Jun 19 - Asteroid 14413 Geiger Closest Approach To Earth (1.496 AU)
* Jun 19 - Asteroid 5441 Andymurray Closest Approach To Earth (1.801 AU)
* Jun 19 - Asteroid 1815 Beethoven Closest Approach To Earth (2.685 AU)
* Jun 19 - 15th Anniversary (2003), Nozomi, Earth Flyby
* Jun 19 - Viktor Patsayev's 85th Birthday (1933)
* Jun 20 - Comet C/2016 M1 (PANSTARRS) At Opposition (1.296 AU)
* Jun 20 - Comet 36P/Whipple At Opposition (3.302 AU)
* Jun 20 - Asteroid 5634 Victorborge Closest Approach To Earth (0.965 AU)
* Jun 20 - Asteroid 4031 Mueller Closest Approach To Earth (1.198 AU)
* Jun 21 - Summer Solstice, 10:07 UT
* Jun 21 - Comet 133P/Elst-Pizarro At Opposition (1.676 AU)
* Jun 21 - Amor Asteroid 2014 MZ5 Near-Earth Flyby (0.077 AU)
* Jun 21 - Aten Asteroid 2014 OL339 Closest Approach To Earth (0.287 AU)
* Jun 21 - Asteroid 10071 Paraguay Closest Approach To Earth (1.313 AU)
* Jun 21 - Asteroid 3267 Glo Closest Approach To Earth (1.926 AU)
* Jun 21 - Centaur Object 5145 Pholus At Opposition (26.850 AU)
* Jun 21 - 25th Anniversary (1993), STS-57 Launch (Space Shuttle Endeavour, Spacehab)
* Jun 21 - Gennady Padalka's 60th Birthday (1958)
* Jun 21 - Maximilian Wolf's 155th Birthday (1863)
* Jun 21 - Jean Chacornac's 195th Birthday (1823)
* Jun 22 - Apollo Asteroid 4034 Vishnu Closest Approach To Earth (1.494 AU)
* Jun 22 - Asteroid 13926 Berners-Lee Closeset Approach To Earth (1.639 AU)
* Jun 22 - Asteroid 7818 Muirhead Closest Approach To Earth (2.068 AU)
* Jun 22 - 40th Anniversary (1978), Jim Christy's Discovery of Pluto's Moon Charon
* Jun 23 - Moon Occults Asteroid 16 Psyche
* Jun 23 - Comet P/2011 CR42 (Catalina) Perihelion (2.522 AU)
* Jun 23 - Comet 210P/Christensen At Opposition (4.264 AU)
* Jun 23 - Apollo Asteroid 467309 (1996 AW1) Near-Earth Flyby (0.046 AU)
* Jun 23 - Asteroid 51829 Williemccool Closest Approach To Earth (1.196 AU)
* Jun 23 - Asteroid 2343 Siding Spring Closest Approach To Earth (1.380 AU)
* Jun 23 - Apollo Asteroid 2063 Bacchus Closest Approach To Earth (1.702 AU)
* Jun 23 - Kuiper Belt Object 50000 Quaoar At Opposition (41.882 AU)
* Jun 24 - Comet P/2013 CU129 (PANSTARRS) Perihelion (0.798 AU)
* Jun 24 - Comet 133P/Elst-Pizarro Closest Approach To Earth (1.675 AU)
* Jun 24 - Aten Asteroid 441987 (2010 NY65) Near-Earth Flyby (0.019 AU)
* Jun 24 - Asteroid 61189 Ohsadaharu Closest Approach To Earth (1.195 AU)
* Jun 24 - 80th Anniversary (1938), Chicora Meteorite Fall (Hit Cow in Pennsylvania)
* Jun 24 - Victor Hess' 125th Birthday (1883)
* Jun 25 - Comet C/2016 M1 (PANSTARRS) Closest Approach To Earth (1.289 AU)
* Jun 25 - Asteroid 2975 Spahr Closest Approach To Earth (1.194 AU)
* Jun 25 - Asteroid 2315 Czechoslovakia Closest Approach To Earth (2.210 AU)
* Jun 26 - Comet P/2009 Q4 (Boattini) At Opposition (3.910 AU)
* Jun 26 - Apollo Asteroid 2007 UD6 Near-Earth Flyby (0.074 AU)
* Jun 26 - Asteroid 3000 Leonardo Closest Approach To Earth (1.379 AU)
* Jun 26 - Asteroid 12002 Suess Closest Approach To Earth (1.760 AU)
* Jun 26 - Asteroid 79896 Billhaley Closest Approach To Earth (1.848 AU)
* Jun 26 - 40th Anniversary (1978), SEASAT 1 Launch
* Jun 27 - Saturn At Opposition
* Jun 27 - Moon Occults Asteroid 4 Vesta
* Jun 27 - Comet 96P/Machholz At Opposition (2.491 AU)
* Jun 27 - Comet 211P/Hill At Opposition (3.500 AU)
* Jun 27 - Atira Asteroid 2015 ME131 Closest Approach To Earth (1.088 AU)
* Jun 28 - Comet 182P/LONEOS At Opposition (2.892 AU)
* Jun 28 - Amor Asteroid 7088 Ishtar Closest Approach To Earth (1.737 AU)
* Jun 29 - Comet 82P/Gehrels Perihelion (3.634 AU)

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