[continued from previous message]

Mar 01 - 10th Anniversary (2009), Chang'e 1, Moon Impact
Mar 01 - 10th Anniversary (2009), Cartersville Meteorite Fall (Hit House in Georgia)
Mar 01 - Deke Slayton's 95th Birthday (1924)
Mar 02 - Moon Occults Dwarf Planet Pluto
Mar 02 - Comet 123P/West-Hartley At Opposition (1.200 AU)
Mar 02 - Comet 355P/LINEAR-NEAT At Opposition (2.959 AU)
Mar 02 - Comet 338P/McNaught At Opposition (3.870 AU)
Mar 02 - Asteroid 10957 Alps Closest Approach To Earth (2.094 AU)
Mar 02 - Asteroid 54522 Menaechmus Closest Approach To Earth (2.166 AU)
Mar 02 - Asteroid 2228 Soyuz-Apollo Closest Approach To Earth (2.138 AU)
Mar 02 - 15th Anniversary (2004), Rosetta Launch
Mar 02 - Aleksandr Oparin's 125th Birthday (1894)
Mar 03 - 50th Anniversary (1969), Apollo 9 Launch
Mar 03 - Moon Occults Asteroid 21 Lutetia
Mar 03 - Comet P/2012 O1 (McNaught) Perihelion (1.435 AU)
Mar 03 - Comet 176P/LINEAR At Opposition (2.620 AU)
Mar 03 - Asteroid 3313 Mendel Closest Approach To Earth (1.717 AU)
Mar 03 - Asteroid 8622 Mayimbialik Closest Approach To Earth (2.650 AU)
Mar 03 - 55th Anniversary (1959), Pioneer 4 Launch
Mar 03 - Bonnie Dunbar's 70th Birthday (1949)
Mar 03 - 140th Anniversary (1879), U.S. Geological Survey Created
Mar 04 - Aten Asteroid 2015 EG Near-Earth Flyby (0.003 AU)
Mar 04 - Aten Asteroid 1996 BG1 Near-Earth Flyby (0.052 AU)
Mar 04 - Asteroid 3173 McNaught Closest Approacht To Earth (1.543 AU)
Mar 04 - Asteroid 4922 Leshin Closest Approach To Earth (1.627 AU)
Mar 04 - 25th Anniversary (1994), STS-62 Launch (Space Shuttle Columbia)
Mar 04 - Tomas Vorobjov's 35th Birthday (1984)
Mar 04 - 40th Anniversary (1979), Voyager 1's Discovery of Jupiter's Rings
Mar 04 - George Gamow's 115th Birthday (1904)
Mar 05 - Comet 321P/SOHO At Opposition (2.884 AU)
Mar 05 - Apollo Asteroid 101955 Bennu Closest Approach To Earth (0.552 AU)
Mar 05 - Asteroid 7225 Huntress Closest Approach To Earth (1.005 AU)
Mar 05 - Asteroid 30439 Moe Closest Approach To Earth (1.213 AU)
Mar 05 - Kuiper Belt Object 2013 FZ27 At Opposition (47.172 AU)
Mar 05 - 40th Anniversary (1979), Voyager 1, Jupiter Flyby
Mar 05 - 40th Anniversary (1979), Steve Synnott's Discovery of Jupiter Moon Thebe
Mar 05 - Jacques Babinet's 225th Birthday (1794)
Mar 06 - Comet 145P/Shoemaker-Levy At Opposition (3.368 AU)
Mar 06 - Comet C/2018 A1 (PANSTARRS) At Opposition (4.327 AU)
Mar 06 - Apollo Asteroid 2008 RR24 Near-Earth Flyby (0.068 AU)
Mar 06 - Asteroid 916 America Closest Approach To Earth (1.859 AU)
Mar 06 - Asteroid 8353 Megryan Closest Approach To Earth (1.907 AU)
Mar 06 - Asteroid 11911 Angel Closest Approach To Earth (2.642 AU)
Mar 06 - 10th Anniversary (2009), Kepler Launch
Mar 07 - Soyuz MS-12 Soyuz-2.1a Launch (International Space Station 58S)
Mar 07 - Comet C/2014 B1 (Schwartz) Closest Approach To Earth (9.035 AU)
Mar 07 - Asteroid 7086 Bopp Closest Approach To Earth (1.127 AU)
Mar 07 - Asteroid 264020 Stuttgart Closest Approach To Earth (1.271 AU)
Mar 07 - Asteroid 5819 Lauretta Closest Approach To Earth (1.549 AU)
Mar 07 - Asteroid 24997 Petergabriel Closest Approach To Earth (1.645 AU)
Mar 07 - Asteroid 4589 McDowell Closest Approach To Earth (1.892 AU)
Mar 07 - Kuiper Belt Object 2013 FY27 At Opposition (79.011 AU)
Mar 07 - Willem Jacob Luyten's 120th Birthday (1899)
Mar 08 - Comet P/2012 O1 (McNaught) Closest Approach To Earth (2.410 AU)
Mar 08 - Apollo Asteroid 2016 ED86 Near-Earth Flyby (0.087 AU)
Mar 08 - 40th Anniversary (1979), Linda Morabito's Discovery of Volcanoes on Io
Mar 08 - Alvan Clark's 215th Birthday (1804)
Mar 09 - International Day of Planetariums
Mar 09 - Comet 264P/Larsen At Opposition (1.737 AU)
Mar 09 - Comet 288P Closest Approach To Earth (2.638 AU)
Mar 09 - Aten Asteroid 2017 GO5 Near-Earth Flyby (0.066 AU)
Mar 09 - Yuri Gagarin's 85th Birthday (1934)
Mar 09 - David Fabricius' 455th Birthday
Mar 10 - Daylight Saving - Set Clock Ahead 1 Hour (United States)
Mar 10 - Comet 288P At Opposition (2.638 AU)
Mar 10 - Apollo Asteroid 24761 Ahau Closest Approach To Earth (1.325 AU)
Mar 10 - Asteroid 14061 Nagincox Closest Approach To Earth (1.607 AU)
Mar 10 - Asteroid 242516 Lindseystirling Closest Approach To Earth (1.658 AU)
Mar 10 - Amor Asteroid 9950 ESA Closest Approach To Earth (2.755 AU)
Mar 11 - Asteroid 1640 Nemo Closest Approach To Earth (2.080 AU)
Mar 11 - Asteroid 8720 Takamizawa Closest Approach To Earth (2.001 AU)
Mar 12 - Comet P/2018 A4 (PANSTARRS) At Opposition (2.695 AU)
Mar 12 - Comet 185P/Petriew Closest Approach To Earth (2.933 AU)
Mar 12 - Comet C/2014 B1 (Schwartz) At Opposition (9.038 AU)
Mar 12 - Atira Asteroid 434326 (2004 JG6) Closest Approach To Earth (1.277 AU)
Mar 12 - Asteroid 2873 Binzel Closest Approach To Earth (1.300 AU)
Mar 12 - Asteroid 7919 Prime Closest Approach To Earth (1.620 AU)
Mar 12 - Gustav Kirchhoff's 195th Birthday (1824)
Mar 13 - Comet 128P-A/Shoemaker-Holt At Opposition (3.498 AU)
Mar 13 - Apollo Asteroid 88254 (2001 FM129) Near-Earth Flyby (0.087 AU)
Mar 13 - Asteroid 22824 von Neumann Closest Approach To Earth (1.716 AU)
Mar 13 - Asteroid 9253 Oberth Closest Approach To Earth (1.831 AU)
Mar 13 - Asteroid 8444 Popovich Closest Approach To Earth (1.870 AU)
Mar 13 - 30th Anniversary (1989), STS-29 Launch (Space Shuttle Discovery, TDRS)
Mar 14 - Pi Day
Mar 14 - Comet P/2006 F4 (Spacewatch) At Opposition (1.513 AU)
Mar 14 - Apollo Asteroid 2016 CK31 Near-Earth Flyby (0.093 AU)
Mar 14 - Asteroid 1712 Angola Closest Approach To Earth (2.176 AU)
Mar 14 - Asteroid 30826 Coulomb Closest Approach To Earth (2.425 AU)
Mar 14 - Asteroid 6042 Chesirecat Closest Approach To Earth (3.310 AU)
Mar 14 - Gene Cernan's 85th Birthday (1934)
Mar 14 - Albert Einstein's 140th Birthday (1879)
Mar 15 - Comet 169P/NEAT Closest Approach To Earth (2.492 AU)
Mar 15 - Apollo Asteroid 2015 EF7 Near-Earth Flyby (0.052 AU)
Mar 15 - Aten Asteroid 483656 (2005 ES70) Near-Earth Flyby (0.056 AU)
Mar 15 - Asteroid 3524 Schulz Closest Approach To Earth (1.309 AU)
Mar 15 - Asteroid 1762 Russell Closest Approach To Earth (2.046 AU)
Mar 15 - 10th Anniversary (2009), STS-119 Launch (Space Shuttle Disocvery, International Space Station)
Mar 16 - Comet 44P/Reinmuth At Opposition (4.217 AU)
Mar 16 - Asteroid 204852 Frankfurt Closest Approach To Earth (1.613 AU)
Mar 16 - Asteroid 12608 Aesop Closest Approach To Earth (2.016 AU)
Mar 16 - Asteroid 35977 Lexington Closest Approach To Earth (2.023 AU)
Mar 16 - Asteroid 6223 Dahl Closest Approach To Earth (2.059 AU)
Mar 16 - Asteroid 9446 Cicero Closest Approach To Earth (2.078 AU)
Mar 16 - Asteroid 1282 Utopia Closest Approach To Earth (2.389 AU)
Mar 16 - Georg Ohm's 230th Birthday (1789)
Mar 17 - Comet 60P/Tsuchinshan At Opposition (0.878 AU)
Mar 17 - Comet C/2018 A6 (Gibbs) Closest Approach To Earth (2.725 AU)
Mar 17 - Comet P/2003 L1 (Scotti) At Opposition (4.351 AU)
Mar 17 - Asteroid 184011 Andypuckett Closest Approach To Earth (1.343 AU)
Mar 17 - Asteroid 763 Cupido Closest Approach To Earth (1.585 AU)
Mar 17 - Asteroid 6984 Lewiscarroll Closest Approach To Earth (2.780 AU)
Mar 17 - Asteroid 2483 Guinevere Closest Approach To Earth (2.992 AU)
Mar 17 - 120th Anniversary (1899), William Pickering's Discovery of Saturn Moon Phoebe
Mar 18 - Comet 69P/Taylor Perihelion (2.449 AU)
Mar 18 - Comet 324P/La Sagra At Opposition (2.591 AU)
Mar 18 - Apollo Asteroid 2016 ED1 Near-Earth Flyby (0.096 AU)
Mar 18 - Asteroid 22521 ZZ Top Closest Approach To Earth (1.288 AU)
Mar 18 - Asteroid 5450 Sokrates Closest Approach To Earth (1.697 AU)
Mar 18 - Asteroid 6434 Jewitt Closest Approach To Earth (1.865 AU)
Mar 18 - Justus Westphal's 195th Birthday (1824)
Mar 19 - Comet 220P/McNaught At Opposition (3.210 AU)
Mar 19 - Comet P/2014 W12 (Gibbs) At Opposition (3.987 AU)
Mar 19 - Asteroid 3749 Balam (2 Moons) Closest Approach To Earth (1.147 AU)
Mar 19 - Apollo Asteroid 38086 Beowulf Closest Approach To Earth (1.194 AU)
Mar 19 - Asteroid 9766 Bradbury Closest Approach To Earth (1.361 AU)
Mar 19 - Asteroid 3869 Norton Closest Approach To Earth (1.698 AU)
Mar 19 - Asteroid 9340 Williamholden Closest Approach To Earth (2.061 AU)
Mar 19 - 140th Anniversary (1879), Tenham Meteorite Shower in Australia
Mar 19 - William Dawes' 220th Birthday (1799)
Mar 20 - Vernal Equinox, 21:58 UT
Mar 20 - Comet 49P/Arend-Rigaux Closest Approach To Earth (1.930 AU)
Mar 20 - Comet 321P/SOHO Closest Approach To Earth (2.844 AU)
Mar 20 - Comet 238P/Read Closest Approach To Earth (2.914 AU)
Mar 20 - Apollo Asteroid 2015 BY310 Near-Earth Flyby (0.059 AU)
Mar 20 - Asteroid 28078 Mauricehilleman Closest Approach To Earth (1.224 AU)
Mar 20 - Asteroid 71885 Denning Closest Approach To Earth (1.267 AU)
Mar 20 - Asteroid 7041 Nantucket Closest Approach To Earth (1.567 AU)
Mar 20 - Asteroid 1655 Comas Sola Closest Approach To Earth (1.888 AU)
Mar 20 - Asteroid 14220 Alexgibbs Closest Approach To Earth (2.071 AU)
Mar 20 - Walter Elsasser's 115th Birthday (1904)
Mar 21 - Supermoon
Mar 21 - Comet P/2014 C1 (TOTAS) At Opposition (0.701 AU)
Mar 21 - Comet 324P/La Sagra Closest Approach To Earth (2.589 AU)
Mar 21 - Comet 115P/Maury At Opposition (3.086 AU)
Mar 21 - Asteroid 7755 Haute-Provence Closest Approach To Earth (1.874 AU)
Mar 21 - Asteroid 1554 Yugoslavia Closest Approach To Earth (2.156 AU)
Mar 21 - Asteroid 5029 Ireland Closest Approach To Earth (2.233 AU)
Mar 21 - George Birkhoff's 135th Birthday (1884)
Mar 21 - 335th Anniversary (1684), Giovanni Cassini's Discovery of Saturn Moon Tethys & Dione
Mar 22 - Mercury Passes 3.4 Degrees From Neptune
Mar 22 - Comet 264P/Larsen Closest Approach To Earth (1.718 AU)
Mar 22 - Comet 238P/Read At Opposition (2.914 AU)
Mar 22 - Comet P/2003 L1 (Scotti) Closest Approach To Earth (4.347 AU)
Mar 22 - Apollo Asteroid 4581 Asciepius Closest Approach To Earth (0.138 AU)
Mar 22 - Asteroid 2074 Shoemaker Closest Approach To Earth (0.950 AU)
Mar 22 - Amor Asteroid 3199 Nefertiti Closest Approach To Earth (1.062 AU)
Mar 22 - Apollo Asteroid 1685 Toro Closest Approach To Earth (1.265 AU)
Mar 22 - Asteroid 13123 Tyson Closest Approach To Earth (1.964 AU)
Mar 22 - Asteroid 35165 Quebec Closest Approach To Earth (2.211 AU)
Mar 22 - Friedrich Argelander's 220th Birthday (1799)
Mar 22 - Ulugh Beg's 625th Birthday (1394)
Mar 23 - Mars Spring Equinox
Mar 23 - Comet P/2006 F4 (Spacewatch) Closest Approach To Earth (1.502 AU)
Mar 23 - Comet P/1999 XN120 (Catalina) Closest Approach To Earth (3.144 AU)
Mar 23 - Comet 326P/Hill At Opposition (4.258 AU)
Mar 23 - Apollo Asteroid 1864 Daedalus Closest Approach To Earth (1.017 AU)
Mar 23 - Asteroid 7758 Poulanderson Closest Approach To Earth (1.332 AU)
Mar 23 - Asteroid 8080 Intel Closest Approach To Earth (2.690 AU)
Mar 23 - Asteroid 37452 Spirit Closest Approach To Earth (3.573 AU)
Mar 23 - Norman Pogson's 190th Birthday (1829)
Mar 23 - Pierre Simon Laplace's 270th Birthday (1749)
Mar 24 - Comet C/2017 S3 (PANSTARRS) At Opposition (3.289 AU)
Mar 24 - Apollo Asteroid 2005 FC3 Near-Earth Flyby (0.077 AU)
Mar 24 - Asteroid 16155 Buddy Closest Approach To Earth (1.812 AU)
Mar 24 - Asteroid 246247 Sheldoncooper Closest Approach To Earth (2.006 AU)
Mar 24 - Asteroid 12542 Laver Closest Approach To Earth (2.540 AU)
Mar 25 - Comet 128P-B/Shoemaker-Holt At Opposition (3.777 AU)
Mar 25 - Comet 128P/Shoemaker-Holt At Opposition (3.778 AU)
Mar 25 - Aten Asteroid 3554 Amun Closest Approach To Earth (1.281 AU)
Mar 25 - Asteroid 9250 Chamberlin Closest Approach To Earth (1.719 AU)
Mar 25 - Asteroid 19034 Santorini Closest Approach To Earth (3.568 AU)
Mar 26 - Dwarf Planet 136472 Makemake At Opposition (51.671 AU)
Mar 26 - Charles Juels' 75th Birthday (1944)
Mar 27 - 50th Anniverary (1969), Mariner 7 Launch (Mars Flyby Mission)
Mar 27 - Comet P/2014 C1 (TOTAS) Closest Approach To Earth (0.697 AU)
Mar 27 - Comet 185P/Petriew At Opposition (2.967 AU)
Mar 27 - Comet 18D/Perrine-Mrkos At Opposition (4.251 AU)
Mar 27 - Apollo Asteroid 2014 TL Near-Earth Flyby (0.057 AU)
Mar 27 - Aten Asteroid 2004 BY1 Near-Earth Flyby (0.063 AU)
Mar 27 - Asteroid 8003 Kelvin Closest Approach To Earth (1.494 AU)
Mar 27 - Amor Asteroid 3908 Nyx Closest Approach To Earth (1.706 AU)
Mar 28 - Comet P/1999 XN120 (Catalina) At Opposition (3.148 AU)
Mar 28 - Asteroid 5020 Asimov Closest Approach To Earth (1.509 AU)
Mar 28 - Neptune Trojan 316179 (2010 EN65) At Opposition (25.989 AU)
Mar 28 - 70th Anniversary (1949), Fred Hoyle Coins the Term "Big Bang"
Mar 29 - Moon Occults Saturn
Mar 29 - Moon Occults Dwarf Planet Pluto
Mar 29 - Comet 138P/Shoemaker-Levy Closest Approach To Earth (2.693 AU)
Mar 29 - Asteroid 4825 Ventura Closest Approach To Earth (1.629 AU)
Mar 29 - Amor Asteroid 2202 Pele Closest Approach To Earth (2.340 AU)
Mar 29 - 45th Anniversary (1974), Mariner 10, 1st Mercury Flyby
Mar 30 - Comet 169P/NEAT At Opposition (2.529 AU)
Mar 30 - Comet 193P/LINEAR-NEAT At Opposition (3.695 AU)
Mar 30 - Asteroid 7175 Janegoodall Closest Approach To Earth (1.945 AU)
Mar 30 - Jean-Francois Pilatre de Rozier's 265th Birthday (1754)
Mar 31 - European Summer Time - Set Clock Ahead 1 Hour (European Union)
Mar 31 - Moon Occults Asteroid 21 Lutetia
Mar 31 - Comet 29P/Schwassmann-Wachmann Perihelion (5.763 AU)
Mar 31 - Apollo Asteroid 163081 (2002 AG29) Near-Earth Flyby (0.099 AU)
Mar 31 - Asteroid 46610 Besixdouz Closest Approach To Earth (1.665 AU)
Mar 31 - Asteroid 11881 Mirstation Closest Approach To Earth (2.036 AU)

April 2019
Apr ?? - Progress MS-12 Soyuz-2.1a Launch (International Space Station 73P)
Apr ?? - Cygnus CRS OA-11 Antares 230 Launch (International Space Station)
Apr ?? - NicaSat-1 (LSTSAT-1) CZ-3B/E Launch
Apr 01 - Comet P/2018 A5 (PANSTARRS) At Opposition (3.671 AU)
Apr 01 - Aten Asteroid 2014 FK38 Near-Earth Flyby (0.059 AU)
Apr 01 - Asteroid 6735 Madhatter Closest Approach To Earth (1.235 AU)
Apr 01 - Aten Asteroid 326290 Akhenaten Closest Approach To Earth (1.298 AU)
Apr 01 - Asteroid 2041 Lancelot Closest Approach To Earth (2.621 AU)
Apr 01 - Asteroid 2866 Hardy Closest Approach To Earth (2.432 AU)
* Apr 01 - Centaur Object 31824 Elatus At Opposition (15.293 AU)
Apr 02 - Mercury Passes 0.4 Degrees From Neptune
Apr 02 - Asteroid 5049 Sherlock Closest Approach To Earth (1.554 AU)
Apr 02 - Asteroid 2198 Ceplecha Closest Approach To Earth (2.003 AU)
Apr 02 - Asteroid 17078 Sellers Closest Approach To Earth (2.358 AU)
Apr 02 - 55th Anniversary (1964), Zond 1 Launch (USSR Venus Flyby Mission)
Apr 02 - 60th Anniversary (1959), Selection Of The Mercury 7 Astronauts
Apr 03 - Comet 149P/Mueller Closest Approach To Earth (1.792 AU)
Apr 03 - Comet 78P/Gehrels Perihelion (2.014 AU)
Apr 03 - Comet C/2017 K1 (PANSTARRS) Closest Approach To Earth (6.714 AU)
Apr 03 - Aten Asteroid 2011 FK1 Near-Earth Flyby (0.076 AU)
Apr 03 - Asteroid 4416 Ramses Closest Approach To Earth (1.526 AU)
Apr 03 - Asteroid 3905 Doppler Closest Approach To Earth (1.837 AU)
Apr 04 - Comet P/2002 EJ57 (LINEAR) Closest Approach To Earth (2.500 AU)
Apr 04 - Apollo Asteroid 2016 GE1 Near-Earth Flyby (0.010 AU)
Apr 04 - Shing-Tung Yau's 70th Birthday (1949)
Apr 05 - Comet 149P/Mueller At Opposition (1.792 AU)
Apr 05 - Comet 284P/McNaught At Opposition (3.732 AU)
Apr 05 - Asteroid 342431 Hilo Closest Approach To Earth (2.344 AU)
Apr 05 - Judith Resnick's 70th Birthday (1949)
Apr 05 - Larry Bell's 125th Birthday (1894)
* Apr 06 - Comet C/2018 K1 (Weiland) At Opposition (3.389 AU)
Apr 06 - Comet 127P/Holt-Olmstead At Opposition (3.682 AU)
Apr 06 - Asteroid 43844 Rowling Closest Approach To Earth (2.230 AU)
Apr 06 - 35th Anniversary (1984), STS-41-C Launch (Space Shuttle Challenger, LDEF)
Apr 07 - Comet 232P/Hill Perihelion (2.985 AU)
Apr 07 - Asteroid 8630 Billprady Closest Approach To Earth (1.024 AU)
Apr 07 - Asteroid 144296 Steviewonder Closest Approach To Earth (1.052 AU)
Apr 07 - Asteroid 34419 Corning Closest Approach To Earth (1.300 AU)
Apr 07 - Asteroid 159814 Saguaro Closest Approach To Earth (1.767 AU)
Apr 07 - Asteroid 904 Rockefellia Closest Approach To Earth (2.054 AU)
Apr 07 - Asteroid 793 Arizona Closest Approach To Earth (2.102 AU)
Apr 07 - Asteroid 495181 Rogerwaters Closest Approach To Earth (2.380 AU)
Apr 07 - 60th Anniversary (1959), Radar Bounced Off Sun by Lincoln Laboratories
Apr 07 - James Glaisher's 210th Birthday (1809)
Apr 08 - Comet C/2017 K1 (PANSTARRS) At Opposition (6.719 AU)
Apr 08 - Asteroid 787 Moskva Closest Approach To Earth (1.653 AU)
Apr 08 - Asteroid 1031 Arctica Closest Approach To Earth (1.906 AU)
Apr 08 - Asteroid 31 Euphrosyne Closest Approach To Earth (2.241 AU)
Apr 08 - 55th Anniversary (1964), Gemini 1 Launch (Unmanned)
Apr 09 - Comet P/2005 GF8 (LONEOS) At Opposition (2.100 AU)
Apr 09 - Aten Asteroid 2016 GW221 Near-Earth Flyby (0.026 AU)
Apr 09 - Aten Asteroid 2014 UR Near-Earth Flyby (0.033 AU)
Apr 09 - Apollo Asteroid 410777 (2009 FD) Closest Approach To Earth (0.230 AU)
Apr 09 - Asteroid 8625 Simonhelberg Closest Approach To Earth (1.816 AU)
Apr 09 - Asteroid 1381 Danubia Closest Approach To Earth (1.939 AU)
Apr 09 - Asteroid 4321 Zero Closest Approach To Earth (2.936 AU)
Apr 09 - Kuiper Belt Object 2014 FT71 At Opposition (46.585 AU)
Apr 09 - 25th Anniversary (1994), STS-59 Launch (Space Shuttle Columbia, Spacelab)
Apr 09 - Mel Apt's 95th Birthday (1924)
Apr 09 - 100th Anniversary (1919), Cumberland Falls Meteorite Fall in Kentucky
Apr 09 - James McDonnell's 120th Birthday (1899)
Apr 10 - Venus Passes 0.3 Degrees From Neptune
Apr 10 - Comet P/2011 W2 (Rinner) Perihelion (2.313 AU)
Apr 10 - Asteroid 163693 Atira Closest Approach To Earth (0.589 AU)
Apr 10 - Atira Asteroid 2014 FO47 Closest Approach To Earth (1.262 AU)
Apr 10 - Asteroid 85197 Ginkgo Closest Approach To Earth (1.526 AU)
Apr 10 - Asteroid 11814 Schwamb Closest Approach To Earth (2.219 AU)
Apr 10 - Kuiper Belt Object 2013 FS28 At Opposition (83.178 AU)
Apr 10 - John Houbolt's 100th Birthday (1919)
Apr 10 - Scott Forbush's 115th Birthday (1904)
Apr 11 - Mercury At Its Greatest Western Elongation (28 Degrees)
Apr 11 - Asteroid 10204 Turing Closest Approach To Earth (1.929 AU)
Apr 11 - Asteroid 21811 Burroughs Closest Approach To Earth (2.203 AU)
Apr 11 - Asteroid 184784 Bettiepage Closest Approach To Earth (2.304 AU)
Apr 11 - Bernhard Schmidt's 140th Birthday (1879)
Apr 12 - International Day of Human Space Flight
Apr 12 - Yuri's Night: World Space Party
Apr 12 - Comet P/2015 X1 (PANSTARRS) At Opposition (4.160 AU)
Apr 12 - Asteroid 295565 Hannover Closest Approach To Earth (1.953 AU)
Apr 12 - Asteroid 23469 Neilpeart Closest Approach To Earth (2.185 AU)
Apr 12 - 170th Anniversary (1849), Annibale de Gasparis' Discovery of Asteroid 10 Hygiea
Apr 13 - Comet P/2014 C1 (TOTAS) Perihelion (1.684 AU)
Apr 13 - Comet 103P/Hartley At Opposition (4.239 AU)
Apr 13 - Asteroid 6000 United Nations Closest Approach To Earth (2.084 AU)
Apr 14 - Apollo Asteroid 2016 FW13 Near-Earth Flyby (0.073 AU)
Apr 14 - Asteroid 11998 Fermilab Closest Approach To Earth (2.612 AU)
Apr 14 - Asteroid 7359 Messier Closest Approach To Earth (2.623 AU)
Apr 14 - Christiaan Huygens' 390th Birthday (1629)
Apr 15 - Comet 49P/Arend-Rigaux At Opposition (2.014 AU)
Apr 15 - Comet C/2018 F4 (PANSTARRS) At Opposition (3.318 AU)
Apr 15 - Comet 61P/Shajn-Schaldach At Opposition (4.245 AU)
Apr 15 - Comet C/2017 F2 (PANSTARRS)Closest Approach To Earth (6.675 AU)
Apr 15 - Asteroid 215423 Winnecke Closest Approach To Earth (1.371 AU)
Apr 15 - Asteroid 4149 Harrison Closest Approach To Earth (1.387 AU)
Apr 15 - Asteroid 30857 Parsec Closest Approach To Earth (1.435 AU)
Apr 15 - Asteroid 46977 Krakow Closest Approach To Earth (2.050 AU)
Apr 15 - Johannes Stark's 145th Birthday (1874)
Apr 16 - Asteroid 1584 Fuji Closest Approach To Earth (1.390 AU)
Apr 16 - Asteroid 129564 Christy Closest Approach To Earth (1.553 AU)
Apr 16 - Asteroid 2023 Asaph Closest Approach To Earth (2.586 AU)
Apr 16 - Asteroid 3693 Barringer Closest Approach To Earth (2.731 AU)
Apr 16 - Dwarf Planet 136108 Haumea At Opposition (49.539 AU)
Apr 17 - Comet 257P/Catalina At Opposition (2.869 AU)
Apr 17 - Comet P/2005 Y2 (McNaught) At Opposition (3.766 AU)
Apr 17 - Asteroid 2579 Spartacus Closest Approach To Earth (1.107 AU)
Apr 17 - Asteroid 2614 Torrence Closest Approach To Earth (1.526 AU)
Apr 17 - Asteroid 1740 Paavo Nurmi Closest Approach To Earth (1.926 AU)
Apr 17 - Asteroid 6824 Mallory Closest Approach To Earth (2.700 AU)
Apr 17 - 5th Anniversay (2014), LADEE, Moon Impact
Apr 17 - 55th Anniversary (1964), Jerrie Mock Becomes 1st Woman To Fly Solo Around The World
Apr 17 - Giovanni Domenico Maraldi's 310th Birthday (1709)
Apr 18 - Aten Asteroid 2012 XO134 Near-Earth Flyby (0.038 AU)
Apr 18 - Asteroid 14764 Kilauea Closest Approach To Earth (0.907 AU)
Apr 18 - Asteroid 26715 South Dakota Closest Approach To Earth (1.952 AU)
Apr 19 - Comet P/2017 S8 (PANSTARRS) Closest Approach To Earth (2.299 AU)
Apr 19 - Comet C/2017 X1 (PANSTARRS) Closest Approach To Earth (4.248 AU)
Apr 19 - Aten Asteroid 2016 JP Near-Earth Flyby (0.049 AU)
Apr 19 - Asteroid 2999 Dante Closest Approach To Earth (1.274 AU)
Apr 19 - Asteroid 2409 Chapman Closest Approach To Earth (1.588 AU)
Apr 19 - Asteroid 1489 Attila Closest Approach To Earth (1.776 AU)
Apr 19 - Asteroid 7000 Curie Closest Approach To Earth (2.063 AU)
Apr 19 - Gertrude Bacon's 145th Birthday (1874)
Apr 20 - Comet P/2005 GF8 (LONEOS) Closest Approach To Earth (2.083 AU)
Apr 20 - Comet P/2002 EJ57 (LINEAR) At Opposition (2.535 AU)
Apr 20 - Comet P/2007 Q2 (Gilmore) At Opposition (4.062 AU)
Apr 20 - Apollo Asteroid 14827 Hypnos Closest Approach To Earth (1.222 AU)
Apr 20 - Asteroid 23638 Nagano Closest Approach To Earth (1.323 AU)
Apr 20 - Asteorid 1913 Sekanina Closest Approach To Earth (2.098 AU)
Apr 20 - Asteroid 8889 Mockturtle Closest Approach To Earth (2.478 AU)
Apr 20 - Asteroid 2848 ASP Closest Approach To Earth (2.820 AU)
Apr 20 - Vincenzo Cerulli's 160th Birthday (1859)
Apr 21 - Easter Sunday
Apr 21 - Apollo Asteroid 2016 WQ3 Near-Earth Flyby (0.073 AU)
Apr 21 - Asteroid 5608 Olmos Closest Approach To Earth (1.625 AU)
Apr 21 - Asteroid 243097 Batavia Closest Approach To Earth (1.688 AU)
Apr 21 - Asteroid 13667 Samthurman Closest Approach To Earth (1.787 AU)
Apr 21 - Jean-Bapiste Biot's 245th Birthday (1774)
Apr 21 - Jan van Riebeeck's 400th Birthday (1619)
Apr 22 - Earth Day
Apr 22 - Lyrids Meteor Shower Peak
Apr 22 - Comet 17P/Holmes At Opposition (3.400 AU)
Apr 22 - Comet P/2017 U3 (PANSTARRS) Perihelion (4.444 AU)
Apr 22 - Asteroid 67 Asia Closest Approach To Earth (1.452 AU)
Apr 22 - Asteroid 11836 Eileen Closest Approach To Earth (2.127 AU)
Apr 22 - Immanuel Kant's 295th Birthday (1724)
Apr 23 - Comet P/2010 TO20 (LINEAR-Grauer) At Opposition (4.846 AU)
Apr 23 - Comet C/2017 F2 (PANSTARRS) At Opposition (6.684 AU)
Apr 23 - Apollo Asteroid 478784 (2012 UV136) Near-Earth Flyby (0.074 AU)
Apr 23 - Asteroid 4352 Kyoto Closest Approach To Earth (2.240 AU)
Apr 24 - Asteroid 3192 A'Hearn Closest Approach To Earth (1.177 AU)
Apr 24 - Asteroid 69263 Big Ben Closest Approach To Earth (1.427 AU)
Apr 24 - Asteroid 10001 Palermo Closest Approach To Earth (1.688 AU)
Apr 24 - Asteroid 76272 De Jong Closest Approach To Earth (2.290 AU)
Apr 24 - Asteroid 1832 Mrkos Closest Approach To Earth (2.586 AU)
Apr 25 - Moon Occults Saturn
Apr 25 - Moon Occults Dwarf Planet Pluto
Apr 25 - Comet P/2007 S1 (Zhao) At Opposition (4.087 AU)
Apr 25 - Comet P/2010 TO20 (LINEAR-Grauer) Closest Approach To Earth (4.846 AU)
Apr 25 - Asteroid 3414 Champollion Closest Approach To Earth (1.313 AU)
Apr 25 - Asteroid 12608 Aesop Closest Approach To Earth (1.582 AU)
Apr 25 - Asteroid 9879 Mammuthus Closest Approach To Earth (1.694 AU)
Apr 25 - Asteroid 3265 Fletcher Closest Approach To Earth (1.725 AU)
Apr 25 - Asteroid 24750 Ohm Closest Approach To Earth (1.984 AU)
Apr 25 - Asteroid 10168 Stony Ridge Closest Approach To Earth (2.001 AU)
Apr 25 - Asteroid 25000 Astrometria Closest Approach To Earth (2.036 AU)
Apr 25 - Asteroid 1140 Crimea Closest Approach To Earth (2.091 AU)
Apr 25 - Apollo Asteroid 2101 Adonis Closest Approach To Earth (2.301 AU)
Apr 25 - 50th Anniversary (1969), Bovedy Meteorite Fall (Hit Store in Ireland)
Apr 25 - Guglielmo Marconi's 145th Birthday (1874)
Apr 26 - Asteroid 263251 Pandabear Closest Approach To Earth (1.486 AU)
Apr 26 - Asteroid 1008 La Paz Closest Approach To Earth (2.327 AU)
Apr 26 - Asteroid 99905 Jeffgrossman Closest Approach To Earth (2.684 AU)
Apr 26 - Owen Richardson's 140th Birthday (1879)
Apr 27 - Apollo Asteroid 3103 Eger Closest Approach To Earth (1.013 AU)
Apr 27 - Asteroid 12426 Racquetball Closest Approach To Earth (1.526 AU)
Apr 27 - Asteroid 5050 Doctorwatson Closest Approach To Earth (1.678 AU)
Apr 27 - Asteroid 2636 Lassell Closest Approach To Earth (1.832 AU)
Apr 27 - Patrick Wiggins' 70th Birthday (1949)
Apr 28 - Comet P/2014 U4 (PANSTARRS) At Opposition (3.353 AU)
Apr 28 - Asteroid 10958 Mont Blanc Closest Approach To Earth (1.125 AU)
Apr 28 - Asteroid 8627 Kunalnayyar Closest Approach To Earth (1.607 AU)
Apr 28 - Asteroid 3989 Odin Closest Approach To Earth (1.656 AU)
Apr 28 - Asteroid 9619 Terrygilliam Closest Approach To Earth (1.694 AU)
Apr 28 - Asteroid 19019 Sunflower Closest Approach To Earth (1.975 AU)
Apr 28 - Asteroid 4999 MPC Closest Approach To Earth (1.997 AU)
Apr 28 - Asteroid 6216 San Jose Closest Approach To Earth (2.006 AU)
Apr 28 - Francis Baily's 245th Birthday (1774)
Apr 29 - Comet P/2017 S8 (PANSTARRS) At Opposition (2.314 AU)
Apr 29 - Comet C/2016 X1 (Lemmon) Perihelion (7.564 AU)
Apr 29 - Aten Asteroid 2008 GL20 Near-Earth Flyby (0.084 AU)
Apr 29 - Asteroid 8952 ODAS Closest Approach To Earth (1.452 AU)
Apr 29 - Asteroid 239672 SOFIA Closest Approach To Earth (1.824 AU)
Apr 29 - Asteroid 1940 Whipple Closest Approach To Earth (2.188 AU)
Apr 29 - Asteroid 60186 Las Cruces Closest Approach To Earth (2.369 AU)
Apr 29 - Kuiper Belt Object 42355 Typhon At Opposition (21.207 AU)
Apr 30 - Comet 250P/Larson Closest Approach To Earth (2.618 AU)
Apr 30 - Comet 257P/Catalina Closest Approach To Earth (2.843 AU)
Apr 30 - Comet C/2017 X1 (PANSTARRS) At Opposition (4.264 AU)
Apr 30 - Asteroid 12524 Conscience Closest Approach To Earth (1.498 AU)
Apr 30 - Asteroid 1157 Arabia Closest Approach To Earth (2.013 AU)
Apr 30 - Kuiper Belt Object 2014 FC69 At Opposition (83.997 AU)

May 2019
May ?? - Soyuz MS-13 Soyuz-FG Launch (International Space Station 59S)
May ?? - Dragon CRS-18 (SpX 18)/GEDI Falcon 9 Launch (International Space Station)
* May ?? - GPS 3A-3 Delta 4 M+ Launch
May 01 - Asteroid 3953 Perth Closest Approach To Earth (1.610 AU)
May 01 - Asteroid 631 Philippina Closest Approach To Earth (1.722 AU)
May 01 - Asteroid 10195 Nebraska Closest Approach To Earth (2.285 AU)
May 01 - 15th Anniversary (2004), Genesis, Earth Flyby
May 01 - 60th Anniversary (1959), Goddard Space Flight Center Established
May 01 - 70th Anniversary (1949), Gerard Kuiper's Discovery of Neptune Moon Nereid
May 02 - Moon Occults Asteroid 4 Vesta
May 02 - Asteroid 6790 Pingouin Closest Approach To Earth (1.200 AU)
May 02 - Amor Asteroid 3122 Florence Closest Approach To Earth (1.378 AU)
May 02 - Asteroid 3487 Edgeworth Closest Approach To Earth (1.563 AU)
May 02 - Asteroid 2160 Spitzer Closest Approach To Earth (2.037 AU)
May 02 - R. Scott Dunbar's 65th Birthday (1952)
May 03 - Comet 138P/Shoemaker-Levy Perihelion (1.703 AU)
May 03 - Amor Asteroid 4957 Brucemurray Closest Approach To Earth (1.066 AU)
May 03 - James Hey's 110th Birthday (1909)
May 04 - Star Wars Day
May 04 - Comet 306P/LINEAR At Opposition (1.827 AU)
May 04 - Comet 3D/Biela Closest Approach To Earth (2.294 AU)
May 04 - Asteroid 4103 Chahine Closest Approach To Earth (1.635 AU)
May 04 - Asteroid 160512 Franck-Hertz Closest Approach To Earth (2.027 AU)
May 04 - Kuiper Belt Object 2010 EK139 At Opposition (35.085 AU)
May 04 - 30th Anniversary (1989), Magellan Launch (Venus Orbiter)
May 04 - Fritz von Opel's 120th Birthday (1899)
May 05 - Space Day
May 05 - National Astronaut Day
May 05 - Eta Aquarids Meteor Shower Peak
May 05 - Comet 102P/Shoemaker At Opposition (3.461 AU)
May 05 - Comet 186P/Garradd Perihelion (4.389 AU)
May 05 - Amor Asteroid 2016 GF216 Near-Earth Flyby (0.092 AU)
May 05 - Amor Asteroid 1980 Tezcatlipoca Closest Approach To Earth (1.244 AU)
May 05 - Asteroid 84225 Verish Closest Approach To Earth (1.477 AU)
May 05 - 20th Anniversary (1999), Galileo, Callisto 20 Flyby
May 06 - Comet P/2012 O2 (McNaught) Perihelion (1.692 AU)
May 06 - Comet C/2018 F4 (PANSTARRS) Closest Approach To Earth (3.257 AU)
May 06 - Amor Asteroid 2009 MN8 Near-Earth Flyby (0.076 AU)
* May 06 - Apollo Asteroid 1865 Cerberus Closest Approach To Earth (0.369 AU)
May 06 - Asteroid 18610 Arthurdent Closest Approach To Earth (1.823 AU)
May 07 - Comet 222P/LINEAR Closest Approach To Earth (1.281 AU)
May 07 - Comet 312P/NEAT At Opposition (2.832 AU)
May 07 - Comet 184P/Lovas At Opposition (3.245 AU)
May 07 - Asteroid 6758 Jesseowens Closest Approach To Earth (1.299 AU)
May 08 - Mercury Passes 1.4 Degrees From Uranus
May 08 - Comet 142P/Ge-Wang At Opposition (4.156 AU)
May 08 - Amor Asteroid 2014 KQ84 Near-Earth Flyby (0.080 AU)
May 08 - Asteroid 6128 Lasorda Closest Approach To Earth (1.292 AU)
May 08 - Asteroid 7645 Pons Closest Approach To Earth (1.560 AU)
May 09 - Comet P/2017 W3 (Gibbs) Closest Approach To Earth (3.676 AU)
May 09 - Amor Asteroid 2008 HS3 Near-Earth Flyby (0.037 AU)
May 09 - Apollo Asteroid 2017 RC Near-Earth Flyby (0.037 AU)
May 09 - Asteroid 2001 Einstein Closest Approach To Earth (0.860 AU)
May 09 - Asteroid 7707 Yes Closest Approach To Earth (1.347 AU)
May 09 - Asteroid 4738 Jimihendrix Closest Approach To Earth (1.706 AU)
May 09 - Centaur Object 144908 (2004 YH32) At Opposition (11.457 AU)
May 09 - Kuiper Belt Object 2010 FX86 At Opposition (45.104 AU)
May 09 - Oleg Atkov's 70th Birthday (1949)
May 10 - Asteroid 7169 Linda Closest Approach To Earth (1.304 AU)
May 10 - Asteroid 6594 Tasman Closest Approach To Earth (1.746 AU)
May 10 - Asteroid 64070 NEAT Closest Approach To Earth (1.997 AU)
May 10 - Asteroid 3264 Bounty Closest Approach To Earth (2.067 AU)
May 10 - Asteroid 31000 Rockchic Closest Approach To Earth (2.088 AU)
May 10 - 140th Anniversary (1879), Estherville Meteorite Shower in Iowa
May 11 - Comet P/2005 T2 (Christensen) At Opposition (2.165 AU)
May 11 - Comet C/2017 T3 (ATLAS) At Opposition (3.244 AU)
May 11 - Apollo Asteroid 468005 (2012 XD112) Near-Earth Flyby (0.098 AU)
May 11 - Asteroid 2867 Steins Closest Approach To Earth (1.262 AU)
May 11 - Asteroid 1000 Piazzia Closest Approach To Earth (1.470 AU)
May 11 - Asteroid 12818 Tomhanks Closest Approach To Earth (1.689 AU)
May 11 - Asteroid 3255 Tholen Closest Approach To Earth (2.312 AU)
May 11 - 10th Anniversary (2008), STS-125 Launch (Space Shuttle Atlantis, Last Hubble Space Telecope Servicing)
May 11 - Antony Hewish's 95th Birthday (1924)
May 12 - Comet 250P/Larson At Opposition (2.640 AU)
May 12 - Comet 138P/Shoemaker-Levy At Opposition (2.706 AU)
May 12 - Comet C/2016 R2 (PANSTARRS) At Opposition (3.983 AU)
May 12 - Aten Asteroid 2009 FU23 Near-Earth Flyby (0.071 AU)

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