January (continued)
- Jan 21 - Greenhouse Gas Observing Satellite (GOSAT)/SDS-1 (Small Demo Sat)/Sohla 1/Microlabsat 2/SpriteSat/PRISM/Kagakaki/KKS-1/STARS H-2A Launch (Japan)
- Jan 21 - Comet 195P/Hill Perihelion (4.439 AU)
- Jan 21 - Asteroid 132524 APL Closest Approach To Earth (2.305 AU)
- Jan 22 - Venus Express, End of Extended Mission
- Jan 22 - Asteroid 216 Kleopatra Occults TYC 0013-00545-1 (11.7 Magnitude Star)
- Jan 23 - Cassini, Orbital Trim Maneuver #180 (OTM-180)
- Jan 23 - Asteroid 2000 CK59 Near-Earth Flyby (0.050 AU)
- Jan 24 - Asteroid 17062 Bardot Closest Approach To Earth (2.249 AU)
- Jan 24 - Asteroid 1604 Tombaugh Closest Approach To Earth (2.252 AU)
- Jan 25 - Comet P/2002 JN16 (LINEAR) Perihelion (1.784 AU)
- Jan 25 - Asteroid 2 Pallas Occults TYC 6468-01802-1 (11.2 Magnitude Star)
- Jan 25 - Asteroid 8249 Gershwin Closest Approach To Earth (1.175 AU)
- Jan 25 - 5th Anniversary (2004), Mars Exploration Rover B (Opportunity), Mars Landing
- Jan 25 - 15th Anniversary (1994), Clementine Launch (USA Moon Orbiter)
- Jan 26 - Annular Solar Eclipse
- Jan 26 - Chinese New Year
- Jan 26 - Comet 144P/Kushida Perihelion (1.439 AU)
- Jan 26 - Asteroid 8088 Australia Closest Approach To Earth (1.387 AU)
- Jan 26 - Asteroid 25399 Vonnegut Closest Approach To Earth (1.521 AU)
- Jan 26-30 - 4th International Workshop on Science and Applications of SAR Polarimetry and Polarimetric Interferometry (POLinSAR 2009), Frascati, Italy
- Jan 27 - Asteroid 2007 UY1 Near-Earth Flyby (0.073 AU)
- Jan 27 - Asteroid 73491 Robmatson Closest Approach To Earth (1.348 AU)
- Jan 27 - Asteroid 1288 Santa Closest Approach To Earth (2.019 AU)
- Jan 28 - Asteroid 5020 Asimov Closest Approach To Earth (1.592 AU)
- Jan 29 - 20th Anniversary (1989), Phobos 2, Mars Orbit Insertion
- Jan 30 - Comet P/2003 O3 (LINEAR) Perihelion (1.247 AU)
- Jan 31 - TacSat 3/Genesat 2/PharmaSat 1/HawkSat 1/CP-6Minotaur 1 Launch
- Jan 31 - Asteroid 38237 Roche Closest Approach To Earth (1.398 AU)
February
- Feb 01 - 10th Anniversary (1999), Galileo, Europa 19 Flyby
- Feb 01-07 - Conference: Thirty Years of Magnetars - New Frontiers, Aspen, Colorado
- Feb 01-07 - Snowbird Workshop on Particle Astrophysics, Astronomy & Cosmology, Snowbird, Utah
- Feb 01-08 - 44th Rencontres de Moriond: Very High Energy Phenomena in the Universe, Val d'Aosta, Italy
- Feb 02 - Cassini, Distant Rhea Flyby
- Feb 02 - Asteroid 2008 CD119Near-Earth Flyby (0.044 AU)
- Feb 02 - Asteroid 6227 Alanrubin Closest Approach To Earth (2.642 AU)
- Feb 04 - NOAA-N Prime (NOAA-19)Delta 2 Launch
- Feb 04 - Cassini, Orbital Trim Maneuver #181 (OTM-181)
- Feb 04 - Asteroid 27 Euterpe At Opposition (8.8 Magnitude)
- Feb 04 - Asteroid 10389 Robmanning Closest Approach To Earth (1.593 AU)
- Feb 04 - Asteroid 51825 Davidbrown Closest Approach To Earth (1.943 AU)
- Feb 04 - Asteroid 43844 Rowling Closest Approach To Earth (2.090 AU)
- Feb 05 - Comet 67P/Churyumov-Gerasimenko Closest Approach To Earth (1.669 AU)
- Feb 05 - Comet 11P/Tempel-Swift-LINEAR Closest Approach To Earth (1.981 AU)
- Feb 05 - Asteroid 3351 Smith Closest Approach To Earth (2.489 AU)
- Feb 05 - Alert Workshop, Noordwijk, The Netherlands
- Feb 05 - 35th Anniversary (1974), Mariner 10, Venus Flyby
- Feb 05-10 - TIARA Winter School on Star Formation, Hsinchu, Taiwan
- Feb 06 - Asteroid 6433 Enya Closest Approach To Earth (1.399 AU)
- Feb 07 - Cassini, Titan Flyby
- Feb 07 - Comet 202P/Scotti Perihelion (2.527 AU)
- Feb 07 - Asteroid 3169 Ostro Closest Approach To Earth (0.898 AU)
- Feb 07 - Asteroid 2830 Greenwich Closest Approach To Earth (1.233 AU)
- Feb 07 - Asteroid 5000 IAU Closest Approach To Earth (1.753 AU)
- Feb 07 - Astronomical Society of the Pacific's 120th Birthday (1889)
- Feb 07 - William Huggins' 185th Birthday (1824)