September (continued)
- Sep 10 - Asteroid 9941 Iguanodo Closest Approach To Earth (1.483 AU)
- Sep 11 - Mercury At Its Greatest Eastern Elongation (27 Degrees)
- Sep 11 - Comet 7P/Pons-Winnecke Perihelion (1.253 AU)
- Sep 11 - Asteroid 2829 Bobhope Closest Approach To Earth (1.665 AU)
- Sep 12 - Asteroid 4370 Dickens Closest Approach To Earth (0.778 AU)
- Sep 12 - Asteroid 2309 Mr. Spock Closest Approach To Earth (1.942 AU)
- Sep 13 - Progress M-66 Soyuz U Launch (International Space Station 31P)
- Sep 13 - Uranus At Opposition
- Sep 13 - Asteroid 588 Achilles Closest Approach To Earth (4.219 AU)
- Sep 13-14 - Pacific Astronomy and Telescope Show, Pasadena, California
- Sep 14 - 30th Anniversary (1978), Venera 12 Launch (USSR Venus Lander)
- Sep 14 - 40th Anniversary (1968), Zond 5 Launch (USSR Moon Orbiter)
- Sep 14-19 - 8th European Space Power Conference, Konstanz, Germany
- Sep 15 - Comet C/2006 OF2 (Broughton) Perihelion (2.431 AU)
- Sep 15 - Asteroid 35352 Texas Closest Approach To Earth (0.952 AU)
- Sep 16 - Asteroid 17023 Abbott Closest Approach To Earth (1.550 AU)
- Sep 16-21 - 27th Scientific Instrument Symposium, Lisbon, Portugal
- Sep 17 - Cassini, Distant Mimas & Calypso Flyby
- Sep 17 - Asteroid 2001 SQ3 Near-Earth Flyby (0.056 AU)
- Sep 18 - STS-126 Launch, Space Shuttle Endeavour (International Space Station ULF2)
- Sep 18 - Comet C/2007 S2 (Lemmon) Perihelion (5.549 AU)
- Sep 18 - Asteroid 3352 McAuliffe Closest Approach To Earth (1.223 AU)
- Sep 18 - Asteroid 3568 ASCII Closest Approach To Earth (1.471 AU)
- Sep 19 - Asteroid 2003 SW130 Near-Earth Flyby (0.022 AU)
- Sep 19 - Asteroid 9949 Brontosaurus Closest Approach To Earth (1.483 AU)
- Sep 19 - 160th Anniversary (1848), William Bonds's & George Bond's Disovery of Saturn Moon Hyperion
- Sep 20 - Cassini, Orbital Trim Maneuver #164A (OTM-164A)
- Sep 21 - 5th Anniversary (2003), Galileo, Jupiter Impact
- Sep 21-26 - European Planetary Science Congress 2008, Munster, Germany
- Sep 22 - Autumnal Equinox, 22:16 UT
- Sep 22 - Comet 147P/Kushida-Muramatsu Perihelion (2.756 AU)
- Sep 22-26 - 9th Hvar Astrophysical Colloquium : Solar Minimum Meeting, Hvar, Croatia
- Sep 23 - Asteroid 5641 McCleese Closest Approach To Earth (1.079 AU)
- Sep 23 - Asteroid 216 Kleopatra Closest Approach To Earth (1.233 AU)
- Sep 23 - Asteroid 12574 LONEOS Closest Approach To Earth (1.711 AU)
- Sep 25 - Asteroid 2001 SY269 Near-Mars Flyby (0.044 AU)
- Sep 25-28 - Symposium: The Invention of the Dutch Telescope, Middelburg, the Netherlands
- Sep 26 - Asteroid 137032 (1998 UO1) Near-Earth Flyby (0.063 AU)
- Sep 26 - 10th Anniversary (1998), Galileo, Europa 17 Flyby
- Sep 27 - Asteroid 2006 TD Near-Earth Flyby (0.081 AU)
- Sep 27 - Asteroid 8014 (1990 MF) Near-Mars Flyby (0.022 AU)
- Sep 27 - 5th Anniversary (2003), SMART-1 Launch (ESA Moon Orbiter)
- Sep 29 - Asteroid 7818 Muirhead Closest Approach To Earth (0.734 AU)
- Sep 29 - Asteroid 3355 Onizuka Closest Approach To Earth (1.141 AU)
- Sep 29-Oct 03 - Back to the Galaxy II Conference, Santa Barbara, California
- Sep 30 - Asteroid 3808 Tempel Closest Approach To Earth (1.619 AU)
- Sep 30 - Asteroid 4169 Celsius Closest Approach To Earth (1.827 AU)
