541.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Thu, 12 Jan 2023 at 15:54 EDT (552 days ago) in Taurus

542.

Comet C/2022 U2 (ATLAS) passes perihelion Comet C/2022 U2 (ATLAS) makes its closest approach to the Sun. Sat, 14 Jan 2023 (550 days ago) in Cassiopeia

543.

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, 14 Jan 2023 at 21:10 EDT (550 days ago) in Virgo

544.

The cluster Messier 47 is well placed The open star cluster M47 (NGC 2422; mag 4.4) in Puppis culminates at around midnight local time. Sun, 15 Jan 2023 (549 days ago) in Puppis

545.

NGC 2403 is well placed NGC 2403 (mag 8.9), a spiral galaxy in Camelopardalis culminates at around midnight local time. Sun, 15 Jan 2023 (549 days ago) in Camelopardalis

546.

Asteroid 2 Pallas at opposition Asteroid 2 Pallas makes closest approach to the Earth. Sun, 15 Jan 2023 at 23:46 EDT (548 days ago) in Canis Major

547.

Lunar occultation of Delta Scorpii The Moon will pass in front of Delta Scorpii (Dschubba), creating a lunar occultation visible from Asia, Christmas Island, Spratly Islands and Paracel Islands. Tue, 17 Jan 2023 at 17:29 EDT (547 days ago) in Scorpius

548.

The cluster NGC 2451 is well placed The open star cluster NGC 2451 (mag 2.8) in Puppis culminates at around midnight local time. Tue, 17 Jan 2023 (547 days ago) in Puppis

549.

γ-Ursae Minorid meteor shower 2023 The γ-Ursae Minorid meteor shower reaches its peak. Thu, 19 Jan 2023 (545 days ago) in Ursa Minor

550.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 6°56'. Fri, 20 Jan 2023 at 02:51 EDT (544 days ago) in Sagittarius

551.

The cluster NGC 2516 is well placed The open star cluster NGC 2516 (mag 3.8) in Volans culminates at around midnight local time. Fri, 20 Jan 2023 (544 days ago) in Carina

552.

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. Sat, 21 Jan 2023 at 00:14 EDT (543 days ago) in Sagittarius

553.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 21 Jan 2023 at 15:54 EDT (543 days ago) in Capricornus

554.

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, 21 Jan 2023 at 15:57 EDT (543 days ago) in Capricornus

555.

Jupiter at perihelion Jupiter passes its orbit's closest point to the Sun. Sun, 22 Jan 2023 at 00:53 EDT (542 days ago) in Pisces

556.

Conjunction of Venus and Saturn Venus and Saturn share the same right ascension, at a separation of 21'. Sun, 22 Jan 2023 at 14:36 EDT (542 days ago) in Capricornus

557.

Close approach of Venus and Saturn Venus and Saturn pass within 20' of each other. Sun, 22 Jan 2023 at 17:13 EDT (542 days ago) in Capricornus

558.

Uranus ends retrograde motion Uranus returns to its usual eastward motion after opposition. Sun, 22 Jan 2023 at 18:23 EDT (542 days ago) in Aries

559.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 3°49'. Mon, 23 Jan 2023 at 02:22 EDT (541 days ago) in Capricornus

560.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 3°27'. Mon, 23 Jan 2023 at 03:19 EDT (541 days ago) in Capricornus