Welcome to the Space Calendar!

Created in 1994, this Space Calendar covers space-related activities
and anniversaries for the upcoming year. It is also available on the
web at:

http://www.jpl.nasa.gov/calendar/

The online version of the Space Calendar includes over 5,400 links to related home pages.

This calendar is compiled and maintained by Ron Baalke. Please send any updates or corrections to ron@jpl.nasa.gov. Note that launch dates
are subject to change at any time. Also, note that anniversary dates are listed in 5 year increments only.

Follow me on Twitter: https://twitter.com/RonBaalke

The following people have contributed to this month's calendar:

o Rick Baldridge, Thomas Schiller

=========================
SPACE CALENDAR
March 22, 2017
=========================

* indicates changes from last month's calendar.

March 2017
Mar ?? - DSX/FORMOSAT 7A-7F/GPIM/OTB/FalconSat 6/NPSat 1/Oculus-ASR/Prox 1/LightSail-B/Nanosat 7/SET 1/SSTE/
ARMADILLO/Falconsat 7 (Peregrine)/TBEx A & B/Prometheus 2-1 - 2-8/TEPCE 1 & 2/CP 9/StangSat Falcon Launch
* Mar ?? - Cosmos (GLONASS 756, Uragan-M N46) Soyuz-2.1b/Fregat-M Launch
Mar 22 - Cassini, Distant Flyby of Pan
Mar 22 - Comet P/2003 T12 (SOHO) Closest Approach To Earth (2.783 AU)
Mar 22 - Asteroid 175 Andromache Occults HIP 20533 (6.3 Magnitude Star)
* Mar 22 - Amor Asteroid 2017 FC1 Near-Earth Flyby (0.040 AU)
Mar 22 - Asteroid 10377 Kilimanjaro Closest Approach To Earth (2.738 AU)
Mar 22 - Neptune Trojan 316179 (2010 EN65) At Opposition (25.253 AU)
Mar 22 - 35th Anniversary (1982), STS-3 Launch (Space Shuttle Columbia)
Mar 23 - Cassini, Distant Flyby of Titan
Mar 23 - Comet 73P-AI/Schwassmann-Wachmann At Opposition (0.538 AU)
Mar 23 - Comet P/2015 Q1 (Scotti) At Opposition (3.101 AU)
Mar 23 - Dwarf Planet Ceres Occults TYC 0647-00586-1 (9.6 Magnitude Star)
Mar 23 - Amor Asteroid 2017 CR32 Near-Earth Flyby (0.074 AU)
Mar 23 - Asteroid 3831 Pettengill Closest Approach To Earth (1.344 AU)
Mar 23 - Centaur Object 31824 Elatus At Opposition (15.242 AU)
Mar 23 - Dwarf Planet 136472 Makemake At Opposition (51.606 AU)
Mar 23 - Wernher von Braun's 105th Birthday (1912)
Mar 23 - Emmy Noether's 135th Birthday (1882)
Mar 23 - Richard Proctor's 180th Birthday (1837)
Mar 24 - Comet 133P/Elst-Pizarro Closest Approach To Earth (2.297 AU)
* Mar 24 - Amor Asteroid 2017 FT Near-Earth Flyby (0.074 AU)
Mar 24 - Asteroid 17473 Freddiemercury Closest Approach To Earth (1.316 AU)
Mar 24 - Asteroid 8250 Cornell Closest Approach To Earth (2.574 AU)
Mar 24 - 25th Anniversary (1992), STS-45 Launch (Space Shuttle Atlantis, ATLAS-1)
Mar 24 - Krafft Ehricke's 100th Birthday (1917)
Mar 24 - Sidney Fox's 105th Birthday (1912)
Mar 25 - Comet 73P-E/Schwassmann-Wachmann Perihelion (0.971 AU)
Mar 25 - Comet 73P-AD/Schwassmann-Wachmann Perihelion (0.972 AU)
Mar 25 - Comet 118P/Shoemaker-Levy At Opposition (1.850 AU)
Mar 25 - Comet P/2008 QP20 (LINEAR-Hill) At Opposition (3.539 AU)
Mar 25 - Apollo Asteroid 162173 Ryugu Closest Approach To Earth (0.651 AU) (Hayabusa 2 Target)
Mar 25 - Asteroid 81203 Polynesia Closest Approach To Earth (1.167 AU)
Mar 25 - Asteroid 42487 Angstrom Closest Approach To Earth (1.796 AU)
Mar 25 - Asteroid 7818 Muirhead Closest Approach To Earth (1.842 AU)
Mar 25 - Asteroid 1042 Amazone Closest Approach To Earth (2.582 AU)
Mar 25 - 160th Anniversary (1857), Frederick Lagenheim Takes 1s Photo of a Solar Eclipse
Mar 26 - European Summer Time - Set Clock Ahead 1 Hour (European Union)
Mar 26 - Moon Occults Neptune
Mar 26 - Comet 73P-AC/Schwassmann-Wachmann Closest Approach To Earth (0.870 AU)
Mar 26 - Comet 73P-M/Schwassmann-Wachmann Perihelion (0.971 AU)
* Mar 26 - Comet 349P/Lemmon At Opposition (1.661 AU)
Mar 26 - Apollo Asteroid 2015 TC25 Near-Earth Flyby (0.020 AU)
* Mar 26 - Aten Asteroid 2017 ED3 Near-Earth Flyby (0.090 AU)
Mar 26 - Atira Asteroid 2013 JX28 Closest Approach To Earth (1.031 AU)
Mar 26 - Asteroid 9500 Camelot Closest Approach To Earth (1.565 AU)
Mar 26 - 20th Anniversary (1997), Heaven's Gate Mass Suicide
Mar 26 - Yuri Gidzenko's 55th Birthday (1962)
* Mar 27 - Cygnus CRS-7 (OA-7 - S.S. John Glenn)/Violet/SUSat/UNSW-EC0/i-INSPIRE 2/ZA-AeroSat/nSIGHT 1/
QARMAN/14-BISa/YUsend-QB50/Ex-Alta 1/BUSAT 1/LilacSat 1/NJUST 1/Aoxiang 1/
SOMP 2/QBITO/Aalto 2/X-CubeSat/EntrySat/IP2SAT/SpaceCube/DUTHSat/UPSat/Hoopoe/
ANUSAT 2/LINK/SNUSAT 1/SNUSAT 1b/GAMASAT 1/RoBiSAT 1/RoBiSAT 2/SamSat-QB50/
qbee50-LTU-OC/BeEagleSat/HAVELSAT/Phoenix/PolyITAN-2-SAU/QBUS 1/QBUS 2/QBUS 3/QBUS 4/
IceCube (Earth 1)/HARP/CSUNSat 1/CXBN 2/OPEN Atlas 5 Launch (International Space Station)
* Mar 27 - SES-10 Falcon 9 Launch
Mar 27 - Juno, Jupiter Flyby
Mar 27 - Mercury Passes 2.4 Degrees from Uranus
Mar 27 - Comet 187P/LINEAR At Opposition (3.175 AU)
Mar 27 - Aten Asteroid 2010 EG21 Near-Earth Flyby (0.074 AU)
Mar 27 - Asteroid 2002 Euler Closest Approach To Earth (1.303 AU)
Mar 27 - Aten Asteroid 367943 Duende Closest Approach To Earth (1.697 AU)
Mar 27 - Asteroid 7816 Hanoi Closest Approach To Earth (1.900 AU)
Mar 27 - Asteroid 2069 Hubble Closest Approach To Earth (1.909 AU)
Mar 27 - Apollo Asteroid 719 Albert Closest Approach To Earth (2.829 AU)
Mar 27 - 45th Anniversary (1972), Venera 8 Launch (USSR Venus Lander/Orbiter Mission)
Mar 28 - Asteroid 216 Kleopatra (2 Moons) Occults TYC 5728-01527-1 (11.4 Magnitude Star)
Mar 28 - Apollo Asteroid 215588 (2003 HF2) Near-Earth Flyby (0.043 AU)
Mar 28 - Apollo Asteroid 2006 HW50 Near-Earth Flyby (0.064 AU)
Mar 28 - Apollo Asteroid 2016 TB18 Near-Earth Flyby (0.099 AU)
Mar 28 - 30th Anniversary (1987), National Space Society Established
Mar 28 - 215th Anniversary (1802), Heinrich Olbers' Discovery of Asteroid 2 Pallas
Mar 29 - Cassini, Distant Flyby of Enceladus & Mimas
Mar 29 - Comet 73P-P/Schwassmann-Wachmann Closest Approach To Earth (0.799 AU)
Mar 29 - Comet 73P-R/Schwassmann-Wachmann Perihelion (0.971 AU)
Mar 29 - Asteroid 9305 Hazard Closest Approach To Earth (1.408 AU)
Mar 29 - Asteroid 12002 Suess Closest Approach To Earth (2.216 AU)
Mar 29 - Aleksandr Viktorenko's 70th Birthday (1947)
Mar 29 - Ernst Klinkerfues' 190th Birthday (1827)
Mar 29 - 210th Anniversary (1807), Heinrich Olbers' Discovery of Asteroid 4 Vesta
Mar 30 - Comet 43P/Wolf-Harrington At Opposition (1.626 AU)
Mar 30 - Comet 162P/Siding Spring At Opposition (3.444 AU)
Mar 30 - Asteroid 6349 Acapulco Closest Approach To Earth (1.320 AU)
Mar 30 - Asteroid 2157 Ashbrook Closest Approach To Earth (1.648 AU)
Mar 30 - Asteroid 1896 Beer Closest Approach To Earth (1.891 AU)
Mar 30 - Asteroid 253 Mathilde Closest Approach To Earth (2.215 AU)
Mar 30 - Ian Shelton's 60th Birthday (1957)
Mar 30 - Yelena Kondakova's 60th Birthday (1957)
Mar 31 - CAS-4A & 4B CZ-2D launch
* Mar 31 - GSAT-19E LVM3 Launch
* Mar 31 - Comet C/2017 E4 (Lovejoy) Closest Approach To Earth (0.606 AU)
Mar 31 - Comet 187P/LINEAR Closest Approach To Earth (3.172 AU)
Mar 31 - Comet 191P/McNaught At Opposition (4.002 AU)
Mar 31 - Asteroid 9880 Stegosaurus Closest Approach To Earth (1.386 AU)
Mar 31 - Asteroid 13926 Berners-Lee Closest Approach To Earth (2.320 AU)

April 2017
Apr ?? - Tianzhou 1 CZ-7 Launch
* Apr ?? - Intelsat 35e Falcon 9 Launch
* Apr ?? - Shijian 13 (ChinaSat 16) CZ-3B Launch
Apr 01 - Mercury At Its Greatest Eastern Elongation (19 Degrees)
Apr 01 - Moon Occults Aldebaran
Apr 01 - Comet 73P-AO/Schwassmann-Wachmann Perihelion (0.972 AU)
Apr 01 - Comet 41P/Tuttle-Giacobini-Kresak Closest Approach To Earth (0.142 AU)
Apr 01 - Comet 157P/Tritton Closest Approach To Earth (2.127 AU)
* Apr 01 - Comet C/2017 E2 (XuYi) At Opposition (2.559 AU)
Apr 01 - 20th Anniversary (1997), Comet Hale-Bopp Perihelion (0.914 AU)
Apr 02 - Comet C/2016 VZ18 (PANSTARRS) Closest Approach To Earth (0.528 AU)
Apr 02 - Comet 73P-AQ/Schwassmann-Wachmann Closest Approach To Earth (0.717 AU)
Apr 02 - Comet 73P-AR/Schwassmann-Wachmann Closest Approach To Earth (0.734 AU)
Apr 02 - Comet 73P-AG/Schwassmann-Wachmann Closest Approach To Earth (0.735 AU)
Apr 02 - Comet 73P-Z/Schwassmann-Wachmann Perihelion (0.973 AU)
Apr 02 - Comet P/2008 WZ96 (LINEAR) At Opposition (3.643 AU)
* Apr 02 - Apollo Asteroid 2017 FV Near-Earth Flyby (0.023 AU)
Apr 02 - Asteroid 88292 Bora-Bora Closest Approach To Earth (1.588 AU)
Apr 02 - Asteroid 274860 Emilylakdawalla Closest Approach To Earth (1.870 AU)
Apr 02 - Amor Asteroid 3552 Don Quixote Closest Approach To Earth (3.085 AU)
Apr 02 - Percy Molesworth's 150th Birthday (1867)
* Apr 03 - Comet 349P/Lemmon Closest Approach To Earth (1.651 AU)
Apr 03 - Asteroid 3 Juno Occults UCAC4-405-101051 (12.4 Magnitude Star)
Apr 03 - Apollo Asteroid 2015 BY310 Near-Earth Flyby (0.079 AU)
Apr 03 - Asteroid 16809 Galapagos Closest Approach To Earth (1.564 AU)
Apr 03 - Asteroid 7784 Watterson Closest Approach To Earth (1.689 AU)
Apr 03 - Asteroid 284891 Kona Closest Approach To Earth (2.252 AU)
Apr 03 - Asteroid 4372 Quincy Closest Approach To Earth (2.275 AU)
Apr 04 - SES-15 Soyuz-STB Fregat-MT Launch
* Apr 04 - GSAT 9 GSLV Mk.2 Launch
Apr 04 - Comet 103P/Hartley At Opposition (2.083 AU)
Apr 04 - Comet P/2003 T12 (SOHO) At Opposition (2.809 AU)
* Apr 04 - Apollo Asteroid 2017 EB3 Near-Earth Flyby (0.035 AU)
Apr 04 - Asteroid 13513 Manilla Closest Approach To Earth (1.025 AU)
Apr 04 - Asteroid 130 Elektra (2 Moons) Closest Approach To Earth (2.841 AU)
Apr 04 - 20th Anniversary (1997), STS-83 Launch (Space Shuttle Columbia)
Apr 04 - Karl Reinmuth's 125th Birthday (1892)
Apr 05 - Cassini, Distant Flyby of Atlas, Pandora & Epimetheus
Apr 05 - Comet 73P-AP/Schwassmann-Wachmann Closest Approach To Earth (1.158 AU)
Apr 05 - Asteroid 249 Ilse Occults HIP 102485 (4.1 Magnitude Star)
Apr 05 - Asteroid 13010 Germantitov Closest Approach To Earth (2.252 AU)
Apr 05 - 20th Anniversary (1997), Galileo, Ganymede 7 Flyby
Apr 06 - Cassini, Distant Flyby of Titan
* Apr 06 - Comet C/2017 C1 (NEOWISE) At Opposition (1.102 AU)
* Apr 06 - Amor Asteroid 2017 DC38 Near-Earth Flyby (0.038 AU)
Apr 06 - Aten Asteroid 2014 FN38 Near-Earth Flyby (0.064 AU)
Apr 06 - Asteroid 21088 Chelyabinsk Closest Approach To Earth (1.270 AU)
Apr 06 - Asteroid 1432 Ethiopia Closest Approach To Earth (1.823 AU)
Apr 06 - Asteroid 85386 Payton Closest Approach To Earth (1.990 AU)
Apr 06 - Asteroid 2421 Nininger Closest Approach To Earth (2.390 AU)
Apr 06 - Kuiper Belt Object 2014 FT71 At Opposition (46.794 AU)
Apr 06 - Donald Douglas' 125th Birthday (1892)
Apr 06 - 2665th Anniversary (648 BC), Earliest Total Solar Eclipse Recorded by the Greeks
Apr 07 - Moon Occults Regulus
Apr 07 - Moon Occults Asteroid 16 Psyche
Apr 07 - Jupiter at Opposition
Apr 07 - Comet 73P-AH/Schwassmann-Wachmann Perihelion (0.973 AU)
Apr 07 - Comet 245P/WISE Closest Approach To Earth (2.207 AU)
Apr 07 - Comet 329P/LINEAR-Catalina At Opposition (3.594 AU)
Apr 07 - Comet 215P/NEAT At Opposition (3.655 AU)
Apr 07 - Asteroid 4464 Vulcano Closest Approach To Earth (1.034 AU)
Apr 07 - Asteroid 27596 Maldives Closest Approach To Earth (2.048 AU)
Apr 07 - Asteroid 13586 Copenhagen Closest Approach To Earth (2.061 AU)
Apr 08 - Comet 104P/Kowal Closest Approach To Earth (2.636 AU)
Apr 08 - Comet C/2016 E1 (PANSTARRS) At Opposition (7.346 AU)
Apr 08 - Aten Asteroid 2016 GH135 Near-Earth Flyby (0.088 AU)
Apr 08 - Asteroid 3904 Honda Closest Approach To Earth (1.718 AU)
Apr 08 - Kuiper Belt Object 2013 FS28 At Opposition (84.431 AU)
Apr 08 - 15th Anniversary (2002), STS-110 Launch (Space Shuttle Atlantis, International Space Station)
Apr 08 - David Rittenhouse's 285th Birthday (1732)
Apr 09 - CRS-11/NICER/CREAM Falcon 9 Launch (International Space Station)
Apr 09 - Comet 73P-BL/Schwassmann-Wachmann Closest Approach To Earth (0.597 AU)
Apr 09 - Comet 73P-AN/Schwassmann-Wachmann Perihelion (0.969 AU)
Apr 09 - Asteroid 7984 Marius Closest Approach To Earth (2.153 AU)
Apr 09 - Comet 267P/LONEOS At Opposition (2.977 AU)
Apr 09 - Centaur Object 10199 Chariklo Occults UCAC4-294-211208 (14.9 Magnitude Star)
Apr 09 - Asteroid 1213 Algeria Closest Approach To Earth (2.572 AU)
Apr 09 - Fabrizio Bernardi's 45th Birthday (1972)
Apr 10 - Soyuz MS-2 Return to Earth (International Space Station)
* Apr 10 - Comet C/2017 E1 (Borisov) Perihelion (0.900 AU)
Apr 10 - Comet 73P-L/Schwassmann-Wachmann Perihelion (0.969 AU)
Apr 10 - Comet 73P-X/Schwassmann-Wachmann Perihelion (0.969 AU)
Apr 10 - Comet 141P-D/Machholz At Opposition (3.732 AU)
Apr 10 - Comet 141P/Machholz At Opposition (3.756 AU)
Apr 10 - Comet 141P-A/Machholz At Opposition (3.756 AU)
Apr 10 - Comet C/2016 E1 (PANSTARRS) Closest Approach To Earth (7.345 AU)
Apr 10 - Asteroid 216 Kleopatra Occults TYC 5738-02638-1 (11.2 Magnitude Star)
Apr 10 - Aten Asteroid 3554 Amun Closest Approach To Earth (0.936 AU)
Apr 10 - Asteroid 5405 Neverland Closest Approach To Earth (1.300 AU)
Apr 10 - Asteroid 96205 Ararat Closest Approach To Earth (1.864 AU)
Apr 10 - Asteroid 5760 Mittlefehldt Closest Approach To Earth (2.069 AU)
Apr 10 - Asteroid 1388 Aphrodite Closest Approach To Earth (2.124 AU)
Apr 10 - Asteroid 20469 Dudleymoore Closest Approach To Earth (2.192 AU)
Apr 10 - Vincenzo Ferraro's 115th Birthday (1902)
Apr 10 - 1180th Anniversary (837 AD), Comet Halley's Known Closest Approach to Earth (3 Million Miles)
Apr 11 - Comet 230P/LINEAR At Opposition (3.110 AU)
* Apr 11 - Comet C/2017 D3 (ATLAS) At Opposition (4.023 AU)
Apr 11 - Comet 206P/Barnard-Boattini At Opposition (4.299 AU)
Apr 11 - Asteroid 17427 Poe Closest Approach To Earth (2.848 AU)
Apr 11 - Wes Huntress' 75th Birthday (1942)
Apr 11 - Anatoly Berezovoy's 75th Birthday (1942)
Apr 11 - William Campbell's 155th Birthday (1862)
Apr 12 - Yuri's Night: World Space Party
Apr 12 - Cassini, Distant Flyby of Mimas, Aegaeon, Janus, Atlas & Prometheus
Apr 12 - Comet 182P/LONEOS Perihelion (1.008 AU)
Apr 12 - Comet 41P/Tuttle-Giacobini-Kresak Perihelion (1.045 AU)
* Apr 12 - Comet C/2017 D3 (ATLAS) Closest Approach To Earth (4.023 AU)
* Apr 12 - Apollo Asteroid 2017 FH1 Near-Earth Flyby (0.053 AU)
Apr 12 - Asteroid 2224 Tucson Closest Approach To Earth (1.886 AU)
Apr 12 - Asteroid 498 Tokio Closest Approach To Earth (2.078 AU)
Apr 12 - Asteroid 1815 Beethoven Closest Approach To Earth (2.119 AU)
Apr 13 - Comet C/2016 A3 (PANSTARRS) Perihelion (4.790 AU)
Apr 13 - Asteroid 7010 Locke Closest Approach To Earth (1.594 AU)
Apr 13 - Asteroid 10217 Richardcook Closest Approach To Earth (2.230 AU)
Apr 13 - Asteroid 2315 Czechoslovakia Closest Approach To Earth (2.307 AU)
Apr 13 - Asteroid 3866 Langley Closest Approach To Earth (2.617 AU)
Apr 13 - Dwarf Planet 136108 Haumea At Opposition (49.693 AU)
Apr 14 - Comet 144P/Kushida At Opposition (1.675 AU)
Apr 14 - Comet P/2007 T2 (Kowalski) At Opposition (3.369 AU)
Apr 14 - Comet 304P/Ory At Opposition (4.084 AU)
Apr 14 - Atira Asteroid 2014 FO47 Closest Approach To Earth (1.418 AU)
Apr 14 - Asteroid 327 Columbia Closest Approach To Earth (1.795 AU)
Apr 14 - Asteroid 5682 Beresford Closest Approach To Earth (1.851 AU)
Apr 14 - Asteroid 84882 Table Mountain Closest Approach To Earth (2.381 AU)
Apr 14 - Valentin Lebedev's 75th Birthday (1942)
Apr 15 - Comet 54P/de Vico-Swift-NEAT Perihelion (2.185 AU)
Apr 15 - Comet 48P/Johnson At Opposition (2.714 AU)
Apr 15 - Comet 113P/Spitaler At Opposition (3.505 AU)
Apr 15 - 3182 Shimanto Occults HIP 98633 (5.7 Magnitude Star)
Apr 15 - Asteroid 3169 Ostro Closest Approach To Earth (1.016 AU)
Apr 15 - Asteroid 2034 Bernoulli Closest Approach To Earth (1.433 AU)
Apr 15 - Samuel Hoffman's 115th Birthday (1902)
Apr 15 - Leonhard Euler's 310th Birthday (1707)
Apr 15 - Leonardo DaVinci's 565th Birthday (1452)
Apr 16 - Easter Sunday
* Apr 16 - NROL-76 Falcon 9 Launch
* Apr 16 - Comet C/2017 E3 (PANSTARRS) Closest Approach To Earth (5.001 AU)
* Apr 16 - Asteroid 5316 Filatov Occults HIP 27511 (4.9 Magnitude Star)
Apr 16 - Asteroid 1034 Mozartia Closest Approach To Earth (1.523 AU)
Apr 16 - Asteroid 6433 Enya Closest Approach To Earth (1.882 AU)
Apr 16 - Asteroid 3784 Chopin Closest Approach To Earth (2.060 AU)
Apr 16 - 45th Anniversary (1972), Apollo 16 Launch (Manned Moon Landing)
Apr 16 - Wilbur Wright's 150th Birthday (1867)
Apr 16 - Robert Luther's 195th Birthday (1822)
Apr 16 - John Hadley's 335th Birthday (1682)
Apr 17 - 50th Anniversary (1967), Surveyor 3 Launch (Moon Lander)
Apr 17 - Comet 73P-AE/Schwassmann-Wachmann Closest Approach To Earth (0.453 AU)
Apr 17 - Comet 73P-AS/Schwassmann-Wachmann Closest Approach To Earth (1.040 AU)
Apr 17 - Comet 261P/Larson At Opposition (3.570 AU)
Apr 17 - Asteroid 9621 Michaelpalin Closest Approach To Earth (1.417 AU)
Apr 17 - Asteroid 3115 Baily Closest Approach To Earth (1.838 AU)
Apr 18 - Cassini, Orbital Trim Maneuver #469 (OTM-469)
* Apr 18 - Asteroid 11949 Kagayayutaka Occults HIP 42353 (6.5 Magnitude Star)
Apr 18 - Apollo Asteroid 143404 (2003 BD44) Near-Earth Flyby (0.056 AU)
Apr 18 - Apollo Asteroid 2006 HE2 Near-Earth Flyby (0.063 AU)
Apr 18 - Asteroid 1743 Schmidt Closest Approach To Earth (1.152 AU)
Apr 18 - Asteroid 1193 Africa Closest Approach To Earth (1.360 AU)
Apr 18 - Asteroid 416 Vaticana Closest Approach To Earth (1.389 AU)
Apr 18 - Asteroid 7536 Fahrenheit Closest Approach To Earth (1.848 AU)
Apr 18 - Charles Elachi's 70th Birthday (1947)
Apr 18 - Brian Mason's 100th Birthday (1917)
Apr 19 - Cassini, Distant Flyby of Methone, Aegaeon, Atlas, Pandora & Daphnis
Apr 19 - Comet 251P/LINEAR At Opposition (0.916 AU)
Apr 19 - Comet C/2015 ER61 (PANSTARRS) Closest Approach To Earth (1.178 AU)
* Apr 19 - Comet C/2017 D3 (ATLAS) Perihelion (4.969 AU)
Apr 19 - Apollo Asteroid 2014 JO25 Near-Earth Flyby (0.012 AU)
Apr 19 - Aten Asteroid 2014 UR Near-Earth Flyby (0.048 AU)
Apr 19 - Amor Asteroid 2016 JF6 Near-Earth Flyby (0.079 AU)
Apr 19 - Asteroid 11083 Caracas Closest Approach To Earth (1.556 AU)
Apr 19 - 35th Anniversary (1982), Salyut 7 Space Station Launch
Apr 19 - Glenn Seaborg's 105th Birthday (1912)
Apr 19 - Grigory Shajn's 125th Birthday (1892)
Apr 20 - Soyuz MS-4 Soyuz-2.1.a Launch (International Space Station 50S)
Apr 20 - Comet 103P/Hartley Perihelion (1.064 AU)
Apr 20 - Comet 212P/NEAT At Opposition (1.740 AU)
Apr 20 - Comet 103P/Hartley Closest Approach To Earth (2.062 AU)
Apr 20 - Amor Asteroid 4957 Brucemurray Closest Approach To Earth (1.141 AU)
Apr 20 - Asteroid 11926 Orinoco Closest Approach To Earth (1.684 AU)
Apr 20 - Asteroid 8722 Schirra Closest Approach To Earth (2.068 AU)
Apr 20 - Asteroid 246913 Slocum Closest Approach To Earth (2.114 AU)
Apr 21 - Comet 73P-AC/Schwassmann-Wachmann Perihelion (0.968 AU)
Apr 21 - Comet C/2013 X1 (PANSTARRS) At Opposition (3.709 AU)
Apr 21 - Apollo Asteroid 2016 UW80 Near-Earth Flyby (0.072 AU)
Apr 21 - Asteroid 1704 Wachmann Closest Approach To Earth (1.049 AU)
Apr 21 - Asteroid 5799 Brewington Closest Approach To Earth (1.931 AU)
Apr 21 - 20th Anniversary (1997), Cremated Remains of 24 People Launched into Space
* Apr 21 - 315th Anniversary (1702) - Maria Margarethe Kirch Becomes 1st Woman to Discover a Comet (C/1702 H1)
Apr 22 - Earth Day
Apr 22 - Cassini, Titan Flyby
Apr 22 - Lyrids Meteor Shower Peak
Apr 22 - Moon Occults Neptune
Apr 22 - Comet 94P/Russell Closest Approach To Earth (1.540 AU)
Apr 22 - Comet 157P/Tritton At Opposition (2.190 AU)
Apr 22 - Comet 107P/Wilson-Harrington At Opposition (2.510 AU)
Apr 22 - Comet P/2014 U2 (Kowalski) At Opposition (3.706 AU)
* Apr 22 - Comet 119P/Parker-Hartley At Opposition (4.201 AU)
Apr 22 - Aten Asteroid 2016 JP Near-Earth Flyby (0.065 AU)
Apr 22 - Asteroid 10051 Albee Closest Approach To Earth (2.137 AU)
Apr 22 - 5th Anniversary (2012), Sutter's Mill Meteorite Fall in California
* Apr 23 - Max Valier Sat/Venta 1/Blue Diamond/Green Diamond/Red Diamond/COMPASS 2/InflateSail/
LituanicaSAT 2/URSA MAIOR/NUDTSat/Pegasus/UCLSat/VZLUsat 1 PSLV Launch
Apr 23 - 50th Anniversary (1967), Soyuz 1 Launch
* Apr 23 - Comet C/2017 E4 (Lovejoy) Perihelion (0.494 AU)
* Apr 23 - Comet C/2017 E3 (PANSTARRS) At Opposition (5.008 AU)
Apr 23 - 55th Anniversary (1962), Ranger 4 Launch (Moon Impact Mission)
Apr 24 - Moon Occults Asteroid 2 Pallas
Apr 24 - Comet 267P/LONEOS Closest Approach To Earth (2.943 AU)
Apr 24 - Asteroid 951 Gaspra Closest Approach To Earth (1.583 AU)
Apr 24 - Asteroid 4226 Damiaan Closest Approach To Earth (2.289 AU)
Apr 24 - 50th Anniversary (1967), 1st Person To Die On A Space Mission - Vladimir Komarov
Apr 24-30 - Astronomy Week
* Apr 25 - ViaSat 2/Eutelsat 172B Ariane 5 Launch
Apr 25 - Comet C/2015 TQ209 (LINEAR) Closest Approach To Earth (2.581 AU)
Apr 25 - Comet 104P/Kowal At Opposition (2.678 AU)
Apr 25 - Comet 21P/Giacobini-Zinner At Opposition (3.502 AU)
Apr 25 - Comet 11P/Tempel-Swift-LINEAR At Opposition (4.183 AU)
Apr 25 - Apollo Asteroid 11066 Sigurd Closest Approach To Earth (1.008 AU)
Apr 25 - Asteroid 15131 Alanalda Closest Approach To Earth (1.506 AU)
Apr 25 - Asteroid 7231 Porco Closest Approach To Earth (2.302 AU)
Apr 25 - 40th Anniversary (1977), Inaugural Flight of Stratospheric Observatory for Infrared Astronomy (SOFIA)
Apr 26 - Cassini, Distant Flyby of Janus, Atlas, Daphnis & Epimetheus
Apr 26 - Comet 73P-P/Schwassmann-Wachmann Perihelion (0.968 AU)
Apr 26 - Comet 67P/Churyumov-Gerasimenko At Opposition (3.738 AU)
Apr 26 - Comet P/2012 SB6 (Lemmon) At Opposition (4.294 AU)
Apr 26 - Comet P/2011 U2 (Bressi) At Opposition (4.626 AU)
Apr 26 - Comet P/2011 U2 (Bressi) Closest Approach To Earth (4.626 AU)
Apr 26 - Asteroid 1996 Adams Closest Approach To Earth (1.828 AU)
Apr 26 - Asteroid 3581 Alvarez Closest Approach To Earth (1.994 AU)
Apr 26 - Asteroid 55 Pandora Closest Approach To Earth (2.125 AU)
Apr 26 - Samantha Cristoforetti's 40th Birthday (1977)
Apr 26 - 55th Anniversary (1962), Kiel Meteorite Fall (Hit House in Germany)
Apr 26 - 55th Anniversary (1962), Ranger 4 Impacts Moon (1st US Spacecraft to Reach Surface of Celestrial Object)
Apr 26 - 55th Anniversary (1962), Cosmos-4 Launch (1st USSR Weather Satellite)
Apr 27 - Asteroid 11195 Woomera Closest Approach To Earth (1.266 AU)
Apr 27 - Valeri Polyakov's 75th Birthday (1942)
Apr 28 - Mercury Passes 0.15 Degrees From Uranus
Apr 28 - Moon Occults Aldebaran
Apr 28 - Comet P/2013 R3 (Catalina-PANSTARRS) At Opposition (2.478 AU)
Apr 28 - Aten Asteroid 2016 HF2 Near-Earth Flyby (0.090 AU)
Apr 28 - Apollo Asteroid 469219 (2016 HO3) Closest Approach To Earth (0.139 AU)
Apr 28 - Atira Asteroid 413563 (2005 TG45) Closest Approach To Earth (0.532 AU)
Apr 28 - Asteroid 7367 Giotto Closest Approach To Earth (1.821 AU)
Apr 28 - Asteroid 3768 Monroe Closest Approach To Earth (2.700 AU)
Apr 29 - Astronomy Day
* Apr 29 - Echostar 21 Proton-M/Briz-M P4 Launch
Apr 29 - Comet 73P-AG/Schwassmann-Wachmann Perihelion (0.967 AU)
Apr 29 - Comet 48P/Johnson Closest Approach To Earth (2.686 AU)
Apr 29 - Comet 204P/LINEAR-NEAT Closest Approach To Earth (2.917 AU)
Apr 29 - Comet C/2015 WZ (PANSTARRS) At Opposition (3.728 AU)
Apr 29 - Asteroid 30785 Greeley Closest Approach To Earth (1.280 AU)
Apr 29 - Asteroid 30928 Jefferson Closest Approach To Earth (1.808 AU)
Apr 29 - Asteroid 5249 Giza Closest Approach To Earth (1.792 AU)
Apr 29 - Kuiper Belt Object 2014 FC69 At Opposition (83.543 AU)
Apr 29 - Forest Moulton's 145th Birthday (1872)
* Apr 30 - Inmarsat 5 F4 Falcon 9 Launch
Apr 30 - Comet 73P-AR/Schwassmann-Wachmann Perihelion (0.968 AU)
Apr 30 - Comet C/2015 B1 (PANSTARRS) Closest Approach To Earth (5.503 AU)
Apr 30 - Asteroid 4319 Jackierobinson Closest Approach To Earth (1.271 AU)
Apr 30 - Asteroid 11277 Ballard Closest Approach To Earth (1.373 AU)
Apr 30 - Asteroid 5062 Glennmiller Closest Approach To Earth (1.630 AU)
Apr 30 - Asteroid 3665 Fitzgerald Closest Approach To Earth (1.678 AU)
Apr 30 - Asteroid 5811 Keck Closest Approach To Earth (1.702 AU)
Apr 30 - 50th Anniversary (1967), 1st Image of Earth Taken from Moon's Surface (Surveyor 3)
Apr 30 - 120th Anniversary (1897), Joseph John Thomson's Discovery of the Electron
Apr 30 - Carl Friedrich Gauss' 240th Birthday (1777)

May 2017
May ?? - SkySat 8-13/COPPER 2/CPOD A & B/MinXSS 2/RANGE A & B Minotaur-C-XL-3210 Launch
* May ?? - Blagovest 1 Proton-M Briz-M Launch
* May ?? - Echostar 105/SES-11 Falcon 9 Launch
May 01 - Comet 73P-AQ/Schwassmann-Wachmann Perihelion (0.967 AU)
May 01 - Aten Asteroid 326290 Akhenaten Closest Approach To Earth (0.298 AU) * May 01 - Asteroid 16770 Angkorwat Closest Approach To Earth (1.734 AU)
May 01 - Asteroid 2404 Antarctica Closest Approach To Earth (1.778 AU)
May 01 - Kuiper Belt Object 42355 Typhon At Opposition (20.077 AU)
May 01 - 335th Anniversary (1682), Inauguration of the Paris Observatory
May 01 - Johann Adam Schall von Bell's 425th Birthday (1592)
May 02 - Cassini, Distant Flyby of Daphnis & Prometheus
May 02 - Comet 255P/Levy Perihelion (1.008 AU)
May 02 - Comet 211P/Hill Closest Approach To Earth (2.569 AU)
May 02 - Comet C/2013 C2 (Tenagra) Closest Approach To Earth (8.414 AU)
May 02 - Asteroid 10044 Squyres Closest Approach To Earth (2.072 AU)
May 02 - Asteroid 5816 Potsdam Closest Approach To Earth (2.332 AU)
May 03 - Comet 94P/Russell At Opposition (1.555 AU)
May 03 - Comet 130P/McNaught-Hughes At Opposition (1.740 AU)
May 03 - Atira Asteroid 164294 (2004 XZ130) Closest Approach To Earth (0.671 AU)
May 03 - Asteroid 4370 Dickens Closest Approach To Earth (1.560 AU)
May 03 - Don Yeomans' 75th Birthday (1942)
May 04 - Moon Occults Regulus
May 04 - Moon Occults Asteroid 16 Psyche
May 04 - Comet C/2013 C2 (Tenagra) At Opposition (8.414 AU)
May 04 - Asteroid 407 Arachne Occults HIP 75272 (6.5 Magnitude Star)
May 04 - Asteroid 9622 Terryjones Closest Approach To Earth (1.511 AU)
May 04 - 15th Anniversary (2002), AQUA Launch
May 04 - 50th Anniversary (1967), Lunar Orbiter 4 Launch
May 05 - Space Day
May 05 - Mars Spring Equinox
May 05 - Eta Aquarids Meteor Shower Peak
May 05 - Comet 73P-W/Schwassmann-Wachmann Closest Approach To Earth (0.181 AU)
May 05 - Comet 189P/NEAT At Opposition (0.709 AU)
May 05 - Comet 251P/LINEAR Closest Approach To Earth (0.883 AU)
May 05 - Comet 334P/NEAT Perihelion (4.185 AU)
May 05 - Comet 201P/LONEOS At Opposition (4.242 AU)
May 05 - Comet C/2015 B1 (PANSTARRS) At Opposition (5.506 AU)
May 05 - Asteroid 3 Juno Occults 2UCAC 29533817 (12.3 Magnitude Star)
May 05 - Amor Asteroid 2009 HG Near-Earth Flyby (0.066 AU)
May 05 - Amor Asteroid 388838 (2008 EZ5) Near-Earth Flyby (0.082 AU)
May 05 - Apollo Asteroid 11311 Peleus Closest Approach To Earth (2.058 AU)
May 05 - Johann Benzenberg's 240th Birthday (1777)
May 06 - Comet P/2013 R3 (Catalina-PANSTARRS) Closest Approach To Earth (2.470 AU)
May 06 - Comet 107P/Wilson-Harrington Closest Approach To Earth (2.479 AU)
May 06 - Comet 207P/NEAT Closest Approach To Earth (2.606 AU)
* May 06 - Asteroid 12373 Lancearmstrong Closest Approach To Earth (1.244 AU)
May 06 - Asteroid 8000 Isaac Newton Closest Approach To Earth (2.045 AU)
May 06 - Asteroid 2620 Santana Closest Approach To Earth (2.047 AU)
May 06 - Centaur Object 144908 (2004 YH32) At Opposition (11.782 AU)
May 06 - Kuiper Belt Object 2010 FX86 At Opposition (45.227 AU)
May 06 - Willem de Sitter's 145th Birthday (1872)
May 07 - Cassini, Distant Flyby of Titan
May 07 - Mercury Passes 2.2 Degrees From Uranus
May 07 - Comet 182P/LONEOS Closest Approach To Earth (1.195 AU)
May 07 - Comet 322P/SOHO At Opposition (3.904 AU)
May 07 - Comet P/2001 F1 (NEAT) Perihelion (4.187 AU)
May 07 - Apollo Asteroid 2015 VD1 Near-Earth Flyby (0.046 AU)
May 07 - 20th Anniversary (1997), Galileo, Ganymede 8 Flyby
May 07 - 25th Anniversary (1992), STS-49 Launch (Space Shuttle Endeavour, Intelsat VI Repair)
May 08 - Comet 73P-BL/Schwassmann-Wachmann Perihlion (0.967 AU)
May 08 - Comet 19P/Borrelly At Opposition (4.082 AU)
May 08 - Aten Asteroid 2016 CU246 Near-Earth Flyby (0.052 AU)
May 08 - Asteroid 18132 Spector Closest Approach To Earth (0.885 AU)
* May 08 - Asteroid 17033 Rusty Closest Approach To Earth (1.266 AU)
May 08 - Asteroid 9620 Ericidle Closest Approach To Earth (1.537 AU)
* May 08 - Asteroid 1224 Fantasia Closest Approach To Earth (1.727 AU)
May 08 - 55th Anniversary (1962), 1st Atlas Centaur Launch
May 08 - 145th Anniversary (1872), Dyalpur Meteorite Fall in India
May 09 - Cassini, Distant Flyby of Daphnis, Pan, Pandora & Titan
May 09 - Comet C/2015 ER61 (PANSTARRS) Perihelion (1.046 AU)
May 09 - Apollo Asteroid 1864 Daedalus Closest Approach To Earth (0.435 AU)
May 09 - Atira Asteroid 434326 (2004 JG6) Closest Approach To Earth (0.882 AU)
* May 09 - Apollo Asteroid 2329 Orthos Closest Approach To Earth (0.936 AU)
May 09 - Asteroid 2554 Skiff Closest Approach To Earth (1.014 AU)
May 09 - Kuiper Belt Object 90568 (2004 GV9) At Opposition (38.509 AU)
May 10 - Apollo Asteroid 85585 Mjolnir Closest Approach To Earth (1.224 AU)
May 11 - Comet 194P/LINEAR Closest Approach To Earth (2.912 AU)
May 11 - Comet 204P/LINEAR-NEAT At Opposition (2.939 AU)
May 11 - Comet P/2012 TK8 (Tenagra) At Opposition (4.263 AU)
May 11 - Asteroid 117329 Spencer Closest Approach To Earth (1.240 AU)
May 11 - Asteroid 3197 Weissman Closest Approach To Earth (2.159 AU)
May 11 - Friedrich Schmiedl's 115th Birthday (1902)
May 12 - Apollo Asteroid 2016 LJ49 Near-Earth Flyby (0.062 AU)
May 12 - Atira Asteroid 2012 VE46 Closest Approach To Earth (0.536 AU)
* May 12 - Apollo Asteroid 4769 Castalia Closest Approach To Earth (0.751 AU)
May 12 - Neptune Trojan 2010 TS191 At Opposition (29.692 AU)
May 13 - Comet 211P/Hill At Opposition (2.586 AU)
May 13 - Comet 36P/Whipple At Opposition (3.989 AU)
May 13 - Asteroid 10387 Bepicolombo Closest Approach To Earth (1.705 AU)
May 13 - Asteroid 91007 Ianfleming Closest Approach To Earth (1.765 AU)
May 13 - Asteroid 34901 Mauna Loa Closest Approach To Earth (2.796 AU)
May 14 - Comet C/2016 T1 (Matheny) Closest Approach To Earth (1.561 AU)
May 14 - Comet 255P/Levy Closest Approach To Earth (1.765 AU)
May 14 - Asteroid 7958 Leakey Closest Approach To Earth (0.976 AU)
May 14 - Asteroid 274020 Skywalker Closest Approach To Earth (2.089 AU)
* May 14 - Asteroid 27500 Mandelbrot Closest Approach To Earth (2.621 AU)
May 15 - Cassini, Distant Flyby of Ephimetheus, Pan, Aegaeon & Atlas
May 15 - Comet P/2015 D6 (Lemmon-PANSTARRS) Closest Approach To Earth (4.520 AU)
May 15 - Asteroid 58221 Boston Closest Approach To Earth (1.932 AU)
May 15 - Asteroid 3992 Wagner Closest Approach To Earth (2.027 AU)
* May 15 - Asteroid 78756 Sloan Closest Approach To Earth (2.054 AU)
May 15 - Asteroid 100007 Peters Closest Approach To Earth (2.243 AU)
May 15 - 20th Anniversary (1997), STS-84 Launch (Space Shuttle Atlantis, Mir Space Station)
May 15 - Williamina Fleming's 160th Birthday (1857)
May 16 - Comet 73P-AE/Schwassmann-Wachmann Perihelion (0.966 AU)
May 16 - Comet 216P/LINEAR Closest Approach To Earth (2.294 AU)
May 16 - Apollo Asteroid 2012 EC Near-Earth Flyby (0.050 AU)
May 16 - Asteroid 93 Minerva Closest Approach To Earth (1.469 AU)
* May 16 - Asteroid 6143 Pythagoras Closest Approach To Earth (1.879 AU)
May 16 - Asteroid 188534 Mauna Kea Closest Approach To Earth (1.941 AU)

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