401.

December solstice 21 December will be the shortest day of 2021 in the northern hemisphere. Tue, 21 Dec 2021 at 10:53 EDT (893 days ago) in Sagittarius

402.

Conjunction of Venus and Pluto Venus and Pluto share the same right ascension, at a separation of 2°09'. Tue, 21 Dec 2021 at 21:55 EDT (893 days ago) in Sagittarius

403.

Ursid meteor shower 2021 The Ursid meteor shower reaches its peak. Wed, 22 Dec 2021 (892 days ago) in Ursa Minor

404.

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. Sun, 26 Dec 2021 at 21:24 EDT (888 days ago) in Virgo

405.

The cluster NGC 2232 is well placed The open star cluster NGC 2232 (mag 4.2) in Monoceros culminates at around midnight local time. Tue, 28 Dec 2021 (886 days ago) in Monoceros

406.

Conjunction of Venus and Mercury Venus and Mercury share the same right ascension, at a separation of 4°13'. Tue, 28 Dec 2021 at 20:10 EDT (886 days ago) in Sagittarius

407.

The Rosette Nebula is well placed The Rosette Nebula (C49; mag 9.0) in Monoceros culminates at around midnight local time. Wed, 29 Dec 2021 (885 days ago) in Monoceros

408.

Conjunction of Mercury and Pluto Mercury and Pluto share the same right ascension, at a separation of 13'. Thu, 30 Dec 2021 at 09:27 EDT (884 days ago) in Sagittarius

409.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 31 Dec 2021 at 14:52 EDT (883 days ago) in Ophiuchus

410.

Lunar occultation of Mars The Moon will pass in front of Mars, creating a lunar occultation visible from Australia. Fri, 31 Dec 2021 at 14:52 EDT (883 days ago) in Ophiuchus

411.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 56'. Fri, 31 Dec 2021 at 15:13 EDT (883 days ago) in Ophiuchus

412.

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. Sat, 01 Jan 2022 at 17:55 EDT (882 days ago) in Sagittarius

413.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 02 Jan 2022 at 13:34 EDT (881 days ago) in Sagittarius

414.

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. Sun, 02 Jan 2022 at 15:54 EDT (881 days ago) in Sagittarius

415.

The cluster Messier 41 is well placed The open star cluster M41 (NGC 2287; mag 4.5) in Canis Major culminates at around midnight local time. Sun, 02 Jan 2022 (881 days ago) in Canis Major

416.

Comet C/2021 A1 (Leonard) passes perihelion Comet C/2021 A1 (Leonard) makes its closest approach to the Sun. Mon, 03 Jan 2022 (880 days ago)

417.

Quadrantid meteor shower 2022 The Quadrantid meteor shower reaches its peak. Mon, 03 Jan 2022 (880 days ago) in Bootes

418.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 3°07'. Mon, 03 Jan 2022 at 20:22 EDT (880 days ago) in Capricornus

419.

The Earth at perihelion The Earth reaches its closest point to the Sun. Tue, 04 Jan 2022 at 01:54 EDT (879 days ago) in Pisces

420.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 4°11'. Tue, 04 Jan 2022 at 11:47 EDT (879 days ago) in Capricornus