601.

The Earth at perihelion The Earth reaches its closest point to the Sun. Wed, 04 Jan 2023 at 11:17 EDT (559 days ago) in Pisces

602.

Full Moon The Moon reaches full phase and is visible for much of the night. Fri, 06 Jan 2023 at 18:07 EDT (557 days ago) in Gemini

603.

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. Fri, 06 Jan 2023 at 22:55 EDT (557 days ago) in Gemini

604.

Mercury at inferior solar conjunction Mercury passes around the near side of the Sun. Sat, 07 Jan 2023 at 07:53 EDT (556 days ago) in Sagittarius

605.

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. Sun, 08 Jan 2023 at 04:19 EDT (555 days ago) in Cancer

606.

Comet C/2022 E3 (ZTF) passes perihelion Comet C/2022 E3 (ZTF) makes its closest approach to the Sun. Thu, 12 Jan 2023 (551 days ago)

607.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Thu, 12 Jan 2023 at 15:54 EDT (551 days ago) in Taurus

608.

Comet C/2022 U2 (ATLAS) passes perihelion Comet C/2022 U2 (ATLAS) makes its closest approach to the Sun. Sat, 14 Jan 2023 (549 days ago) in Cassiopeia

609.

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 (549 days ago) in Virgo

610.

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 (548 days ago) in Puppis

611.

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 (548 days ago) in Camelopardalis

612.

Asteroid 2 Pallas at opposition Asteroid 2 Pallas makes closest approach to the Earth. Sun, 15 Jan 2023 at 23:46 EDT (547 days ago) in Canis Major

613.

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 (546 days ago) in Scorpius

614.

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 (546 days ago) in Puppis

615.

γ-Ursae Minorid meteor shower 2023 The γ-Ursae Minorid meteor shower reaches its peak. Thu, 19 Jan 2023 (544 days ago) in Ursa Minor

616.

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 (543 days ago) in Sagittarius

617.

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 (543 days ago) in Carina

618.

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 (542 days ago) in Sagittarius

619.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 21 Jan 2023 at 15:54 EDT (542 days ago) in Capricornus

620.

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 (542 days ago) in Capricornus