401.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°29'. Wed, 30 Aug 2023 at 14:07 EDT (305 days ago) in Aquarius

402.

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, 30 Aug 2023 at 11:54 EDT (305 days ago) in Aquarius

403.

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. Tue, 29 Aug 2023 at 04:36 EDT (306 days ago) in Capricornus

404.

Uranus enters retrograde motion Uranus reverses its direction of motion across the sky. Mon, 28 Aug 2023 at 22:11 EDT (307 days ago) in Aries

405.

Saturn at opposition Saturn lies in the opposite direction to the Sun in the sky, making it slightly closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Sun, 27 Aug 2023 at 04:20 EDT (308 days ago) in Aquarius

406.

Asteroid 8 Flora at opposition Asteroid 8 Flora makes closest approach to the Earth. Sat, 26 Aug 2023 at 19:58 EDT (309 days ago) in Aquarius

407.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from the Contiguous United States, Mexico and Canada. Thu, 24 Aug 2023 at 22:29 EDT (311 days ago) in Scorpius

408.

Lunar occultation of Delta Scorpii The Moon will pass in front of Delta Scorpii (Dschubba), creating a lunar occultation visible from Antarctica. Thu, 24 Aug 2023 at 09:16 EDT (311 days ago) in Scorpius

409.

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. Thu, 24 Aug 2023 at 05:57 EDT (311 days ago) in Scorpius

410.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Fri, 18 Aug 2023 at 21:17 EDT (317 days ago) in Virgo

411.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 2°10'. Fri, 18 Aug 2023 at 19:07 EDT (317 days ago) in Virgo

412.

κ-Cygnid meteor shower 2023 The κ-Cygnid meteor shower reaches its peak. Fri, 18 Aug 2023 (317 days ago) in Draco

413.

Comet C/2023 E1 (ATLAS) passes perigee Comet C/2023 E1 (ATLAS) makes its closest approach to the Earth. Fri, 18 Aug 2023 (317 days ago) in Cygnus

414.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 6°56'. Fri, 18 Aug 2023 at 07:26 EDT (317 days ago) in Leo

415.

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. Fri, 18 Aug 2023 at 04:41 EDT (317 days ago) in Leo

416.

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. Wed, 16 Aug 2023 at 07:54 EDT (319 days ago) in Leo

417.

New Moon The Moon disappears into the Sun's glare for a few days. Wed, 16 Aug 2023 at 05:39 EDT (319 days ago) in Leo

418.

Messier 2 is well placed The globular cluster M2 (NGC 7089; mag 6.6) in Aquarius culminates at around midnight local time. Tue, 15 Aug 2023 (320 days ago) in Aquarius

419.

Messier 15 is well placed The globular cluster M15 (NGC 7078; mag 6.3) in Pegasus culminates at around midnight local time. Mon, 14 Aug 2023 (321 days ago) in Pegasus

420.

Venus at inferior solar conjunction Venus passes around the near side of the Sun. Sun, 13 Aug 2023 at 07:10 EDT (322 days ago) in Cancer