5541.

Lunar occultation of Delta Scorpii The Moon will pass in front of Delta Scorpii (Dschubba) creating a lunar occultation, though it will open be visible only at sea. Thu, 22 Dec 2011 at 11:25 EDT (4,580 days ago) in Scorpius

5542.

December solstice 22 December will be the shortest day of 2011 in the northern hemisphere. Thu, 22 Dec 2011 at 00:36 EDT (4,580 days ago) in Sagittarius

5543.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month. Wed, 21 Dec 2011 at 21:58 EDT (4,581 days ago) in Libra

5544.

December Leonis Minorid meteor shower 2011 The December Leonis Minorid meteor shower reaches its peak. Tue, 20 Dec 2011 (4,582 days ago) in Leo Minor

5545.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 6°30'. Tue, 20 Dec 2011 at 05:12 EDT (4,582 days ago) in Virgo

5546.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Tue, 20 Dec 2011 (4,582 days ago) in Ophiuchus

5547.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Tue, 20 Dec 2011 at 01:58 EDT (4,582 days ago) in Virgo

5548.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Sun, 18 Dec 2011 at 13:43 EDT (4,584 days ago) in Scorpius

5549.

Moon at Last Quarter The Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise. Sat, 17 Dec 2011 at 19:48 EDT (4,585 days ago) in Leo

5550.

Supernova SN2011ja discovered A new supernova has been discovered in NGC 4945. Sat, 17 Dec 2011 (4,584 days ago)

5551.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 8°29'. Sat, 17 Dec 2011 at 08:26 EDT (4,585 days ago) in Leo

5552.

Comae Berenicid meteor shower 2011 The Comae Berenicid meteor shower reaches its peak. Fri, 16 Dec 2011 (4,586 days ago) in Leo

5553.

Geminid meteor shower 2011 The Geminid meteor shower reaches its peak. Wed, 14 Dec 2011 (4,588 days ago) in Gemini

5554.

σ-Hydrid meteor shower 2011 The σ-Hydrid meteor shower reaches its peak. Mon, 12 Dec 2011 (4,590 days ago) in Hydra

5555.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 10 Dec 2011 at 09:36 EDT (4,592 days ago) in Taurus

5556.

Total lunar eclipse There will be an eclipse of the Moon, visible from Asia, Russia, the Americas, Oceania, Eastern and Northern Europe and Alaska. Sat, 10 Dec 2011 at 09:32 EDT (4,592 days ago) in Taurus

5557.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Sat, 10 Dec 2011 at 02:59 EDT (4,592 days ago) in Pisces

5558.

Monocerotid meteor shower 2011 The Monocerotid meteor shower reaches its peak. Fri, 09 Dec 2011 (4,593 days ago) in Monoceros

5559.

The Moon at aphelion The Moon recedes to its orbit's furthest point from the Sun, which happens each month around the time of full moon. Thu, 08 Dec 2011 at 22:58 EDT (4,594 days ago) in Taurus

5560.

Supernova SN2011iy discovered A new supernova has been discovered in NGC 4984. Thu, 08 Dec 2011 (4,593 days ago)