3041.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from countries and territories including Canada, Greenland, the Contiguous United States and Russia amongst others. Sat, 30 Dec 2017 at 19:35 EDT (2,378 days ago) in Taurus

3042.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Sat, 30 Dec 2017 at 16:03 EDT (2,378 days ago) in Taurus

3043.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Fri, 29 Dec 2017 (2,379 days ago) in Monoceros

3044.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Thu, 28 Dec 2017 (2,379 days ago) in Ophiuchus

3045.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Thu, 28 Dec 2017 (2,380 days ago) in Monoceros

3046.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Wed, 27 Dec 2017 at 18:29 EDT (2,381 days ago) in Ophiuchus

3047.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and setting in the west at around midnight. Tue, 26 Dec 2017 at 04:20 EDT (2,382 days ago) in Pisces

3048.

Ursid meteor shower 2017 The Ursid meteor shower reaches its peak. Fri, 22 Dec 2017 (2,386 days ago) in Ursa Minor

3049.

Saturn at solar conjunction Saturn is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 21 Dec 2017 at 15:59 EDT (2,387 days ago) in Sagittarius

3050.

December solstice 21 December will be the shortest day of 2017 in the northern hemisphere. Thu, 21 Dec 2017 at 11:23 EDT (2,387 days ago) in Sagittarius

3051.

December Leonis Minorid meteor shower 2017 The December Leonis Minorid meteor shower reaches its peak. Tue, 19 Dec 2017 (2,389 days ago) in Leo Minor

3052.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Mon, 18 Dec 2017 at 21:39 EDT (2,390 days ago) in Sagittarius

3053.

The Moon at apogee The Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month. Mon, 18 Dec 2017 at 20:25 EDT (2,390 days ago) in Sagittarius

3054.

New Moon The Moon disappears into the Sun's glare for a few days. Mon, 18 Dec 2017 at 01:31 EDT (2,390 days ago) in Sagittarius

3055.

Asteroid 20 Massalia at opposition Asteroid 20 Massalia makes closest approach to the Earth. Fri, 15 Dec 2017 at 23:46 EDT (2,392 days ago) in Taurus

3056.

Comae Berenicid meteor shower 2017 The Comae Berenicid meteor shower reaches its peak. Fri, 15 Dec 2017 (2,392 days ago) in Leo

3057.

The Orion Nebula is well placed The Orion Nebula (M42; mag 4.0) culminates at around midnight local time. Fri, 15 Dec 2017 (2,393 days ago) in Orion

3058.

The Running Man cluster is well placed The Running Man cluster NGC 1977 (mag 4.2) in Orion's sword culminates at around midnight local time. Fri, 15 Dec 2017 (2,393 days ago) in Orion

3059.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Thu, 14 Dec 2017 at 11:56 EDT (2,394 days ago) in Libra

3060.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°14'. Thu, 14 Dec 2017 at 09:26 EDT (2,394 days ago) in Libra