Portal:Astronomy/Events/January 2011
| 3 January, 18:32 | Earth at perihelion |
| 4 January | Quadrantids peak |
| 4 January, 08:52 | New moon and partial solar eclipse |
| 8 January, 16:00 | Venus at greatest western elongation |
| 9 January, 14:24 | Mercury at greatest western elongation |
| 10 January, 05:41 | Moon at apogee |
| 19 January, 21:21 | Full moon |
| 22 January, 00:17 | Moon at perigee |