[continued from previous message]

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 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 ?? - CBERS 4A/Ziyuan 1E2 CZ-4B 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)
* Mar 06 - Amor Asteroid 2009 MN8 Near-Earth Flyby (0.076 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 (3.677 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)
* May 12 - Asteroid 71000 Hughdowns Closest Approach To Earth (2.167 AU)
* May 12 - Kuiper Belt Object 90568 (2004 GV9) At Opposition (38.611 AU)
* May 13 - Comet 74P/Smirnova-Chernykh Closest Approach To Earth (2.863 AU)
* May 13 - Comet P/2007 R2 (Gibbs) At Opposition (2.970 AU)
* May 13 - Comet 162P/Siding Spring At Opposition (3.261 AU)
* May 13 - Comet 224P/LINEAR-NEAT At Opposition (3.817 AU)
* May 13 - Comet 316P/LONEOS-Christensen At Opposition (3.913 AU)
* May 13 - Comet P/2015 Q1 (Scotti) At Opposition (4.063 AU)
* May 13 - Asteroid 5720 Halweaver Closest Approach To Earth (1.367 AU)
* May 14 - Comet C/2017 M4 (ATLAS) Closest Approach To Earth (2.481 AU)
* May 14 - Comet 141P-D/Machholz At Opposition (3.731 AU)
* May 14 - Comet P/2008 QP20 (LINEAR-Hill) At Opposition (4.123 AU)
* May 14 - 10th Anniversary (2009), Herschel/Planck Launch
* May 14 - 70th Anniversary (1949), Comet 147P/Kushida-Muramatsu Captured Into Jupiter Orbit
* May 14 - 155th Anniversary (1864), Orgueil Meteorite Shower in France
* May 14 - Peder Horrebow's 340th Birthday (1679)
* May 15 - Comet 183P/Korlevic-Juric Closest Approach To Earth (3.255 AU)
* May 15 - Comet 141P-A/Machholz At Opposition (3.673 AU)
* May 15 - Comet 141P/Machholz At Opposition (3.674 AU)
* May 15 - Comet P/2004 R3 (LINEAR-NEAT) At Opposition (3.937 AU)
* May 15 - Comet 265P/LINEAR At Opposition (4.082 AU)
* May 15 - Asteroid 5261 Eureka Closest Approach To Earth (0.565 AU)
* May 15 - Asteroid 9998 ISO Closest Approach To Earth (1.320 AU)
* May 15 - Asteroid 67085 Oppenheimer Closest Approach To Earth (1.691 AU)
* May 15 - Frank Culbertson's 70th Birthday (1949)
* May 16 - 50th Anniversary (1969), Venera 5, Venus Impact
* May 16 - Asteroid 15845 Bambi Closest Approach To Earth (1.550 AU)
* May 16 - Asteroid 10637 Heimlich Closest Approach To Earth (2.181 AU)
* May 16 - Kuiper Belt Object 65407 (2002 RP120) At Opposition (30.810 AU)
* May 16 - Roy Kerr's 85th Birthday (1934)
* May 17 - 50th Anniversary (1969), Venera 6, Venus Impact
* May 17 - Comet 74P/Smirnova-Chernykh At Opposition (2.865 AU)
* May 17 - Asteroid 3263 Bligh Closest Approach To Earth (1.539 AU)
* May 17 - Asteroid 20 Massalia Closest Approach To Earth (1.617 AU)
* May 17 - Kuiper Belt Object 2015 BP519 At Opposition (52.674 AU)
* May 17 - 20th Anniversary (1999), STS-96 Launch (Space Shuttle Discovery, International Space Station)
* May 18 - Blue Moon
* May 18 - Venus Passes 1.1 Degrees From Uranus
* May 18 - 50th Anniversary (1969), Apollo 10 Launch
* May 18 - Comet P/2003 T12 (SOHO) At Opposition (2.640 AU)
* May 18 - Comet 206P/Barnard-Boattini At Opposition (3.671 AU)
* May 18 - Apollo Asteroid 2012 KT12 Near-Earth Flyby (0.008 AU)
* May 18 - Asteroid 12927 Pinocchio Closest Approach To Earth (1.581 AU)
* May 18 - Asteroid 19148 Alaska Closest Approach To Earth (1.899 AU)
* May 18 - Neptune Trojan 2010 TS191 At Opposition (29.665 AU)
* May 19 - Moon Occults Dwarf Planet Ceres
* May 19 - Comet P/2018 C1 (Lemmon-Read) At Opposition (3.077 AU)
* May 19 - Comet 183P/Korlevic-Juric At Opposition (3.257 AU)
* May 19 - Asteroid 9951 Tyrannosaurus Closest Approach To Earth (1.232 AU)
* May 19 - Asteroid 2022 West Closest Approach To Earth (2.006 AU)
* May 19 - Kuiper Belt Object 2015 KH162 At Opposition (58.988 AU)
* May 19 - 15th Anniversary (2004), Hayabusa (MUSES-C), Earth Flyby
* May 19 - Dick Scobee's 80th Birthday (1939)
* May 20 - Comet C/2017 M4 (ATLAS) At Opposition (2.489 AU)
* May 20 - Comet P/2017 W3 (Gibbs) At Opposition (3.693 AU)
* May 20 - Apollo Asteroid 68950 (2002 QF15) Near-Earth Flyby (0.088 AU)
* May 20 - Apollo Asteroid 2017 QP16 Near-Earth Flyby (0.099 AU)
* May 20 - Asteroid 736 Harvard Closest Approach To Earth (1.234 AU)
* May 20 - Asteroid 4345 Rachmaninoff Closest Approach To Earth (1.948 AU)
* May 21 - Asteroid 9618 Johncleese Closest Approach To Earth (1.451 AU)
* May 21 - Asteroid 1197 Rhodesia Closest Approach To Earth (1.549 AU)
* May 21 - Asteroid 171183 Haleakala Closest Approach To Earth (1.917 AU)
* May 21 - C. Michelle Olmstead's 50th Birthday (1969)
* May 22 - Moon Occults Saturn
* May 22 - Comet 312P/NEAT Closest Approach To Earth (2.804 AU)
* May 22 - Comet 16P/Brooks At Opposition (3.593 AU)
* May 22 - Comet 158P/Kowal-LINEAR At Opposition (3.861 AU)
* May 22 - Asteroid 9341 Gracekelly Closest Approach To Earth (1.523 AU)
* May 22 - Asteroid 8256 Shenzhou Closest Approach To Earth (1.733 AU)
* May 22 - Peter Kusnirak's 45th Birthday (1974)
* May 23 - Moon Occults Dwarf Planet Pluto
* May 23 - Comet 158P/Kowal-LINEAR Closest Approach To Earth (3.861 AU)
* May 23 - Apollo Asteroid 4179 Toutatis Closest Approach To Earth (2.978 AU)
* May 23 - 115th Anniversary (1904), 1st Flight of Wright Brother's 2nd Plane (Flyer II)
* May 24 - Comet P/2008 WZ96 (LINEAR) At Opposition (3.764 AU)
* May 24 - Asteroid 2956 Yeomans Closest Approach To Earth (1.503 AU)
* May 24 - Asteroid 172996 Stooke Closest Approach To Earth (1.612 AU)
* May 24 - Asteroid 12104 Chesley Closest Approach To Earth (1.931 AU)
* May 24 - Ivan Yarkovsky's 175th Birthday (1844)
* May 24 - William Gilbert's 475th Birthday (1544)
* May 25 - Towel Day - Annual Tribute to Douglas Adams
* May 25 - Comet 363P/Lemmon Closest Approach To Earth (2.718 AU)
* May 25 - Aten Asteroid 66391 (1999 KW4) Near-Earth Flyby (0.035 AU)
* May 25 - Aten Asteroid 2015 KQ18 Near-Earth Flyby (0.027 AU)
* May 25 - Igor Sikorsky's 130th Birthday (1889)
* May 25 - John Tebbutt's 185th Birthday (1834)
* May 26 - Comet P/2005 T2 (Christensen) Closest Approach To Earth (2.133 AU)
* May 26 - Asteroid 342843 Davidbowie Closest Approach To Earth (1.841 AU)
* May 26 - Otto Neugebauer's 120th Birthday (1899)
* May 26 - Henri Farman's 145th Birthday (1874)
* May 27 - Asteroid 116939 Jonstewart Closest Approach To Earth (1.033 AU)
* May 27 - Dwarf Planet Ceres Closest Approach To Earth (1.751 AU)
* May 28 - Comet P/2007 R2 (Gibbs) Closest Approach To Earth (2.937 AU)
* May 28 - Plutino 2006 HJ123 At Opposition (32.782 AU)
* May 28 - 60th Anniversary (1959), Jupiter C Launch Of Two Monkeys (Able & Baker)
* May 28 - Milutin Milankovic's 140th Birthday (1879)
* May 28 - Edward Charles Howard's 245th Birthday (1774)
* May 29 - 100th Anniversary (1919), Solar Eclipse Confirms Einstein's General Theory Of Relativity
* May 29 - Comet 306P/LINEAR Closest Approach To Earth (1.748 AU)
* May 29 - Comet 3D/Biela At Opposition (2.381 AU)
* May 29 - Aten Asteroid 2003 LH Near-Earth Flyby (0.040 AU)
* May 29 - 45th Anniversary (1974), Luna 22 Launch (Soviet Moon Orbiter)
* May 29 - Peter Higgs' 90th Birthday (1929)
* May 30 - Moon Occults Asteroid 4 Vesta
* May 30 - Comet 147P/Kushida-Muramatsu At Opposition (3.818 AU)
* May 30 - Apollo Asteroid 2011 HP Near-Earth Flyby (0.031 AU)
* May 30 - Asteroid 1631 Kopff Closest Approach To Earth (1.143 AU)
* May 30 - Asteroid 6470 Aldrin Closest Approach To Earth (1.530 AU)
* May 30 - Kuiper Belt Object 2010 JO179 At Opposition (58.249 AU)
* May 30 - Ken Lawrence's 55th Birthday (1964)
* May 30 - Claudia Alexander's 60th Birthday (1959)
* May 30 - Alexey Leonov's 85th Birthday (1934)
* May 31 - Comet 191P/McNaught At Opposition (3.202 AU)
* May 31 - Comet 156P/Russell-LINEAR At Opposition (3.344 AU)
* May 31 - Comet 108P/Ciffreo At Opposition (4.225 AU)
* May 31 - Asteroid 63163 Jerusalem Closest Approach To Earth (1.486 AU)
* May 31 - Asteroid 301 Bavaria Closest Approach To Earth (1.543 AU)
* May 31 - Asteroid 3001 Michelangelo Closest Approach To Earth (1.556 AU)
* May 31 - Plutino 38628 Huya At Opposition (27.684 AU)

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