341.

Lunar occultation of Neptune The Moon will pass in front of Neptune, creating a lunar occultation visible from countries and territories including Canada, the Contiguous United States, Mexico and Alaska amongst others. Wed, 18 Sep 2024 at 03:04 EDT (135 days away) in Pisces

342.

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, 18 Sep 2024 at 09:22 EDT (135 days away) in Pisces

343.

Neptune at opposition Neptune lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Fri, 20 Sep 2024 at 20:08 EDT (137 days away) in Pisces

344.

Close approach of the Moon and M45 The Moon and M45 pass close to each other. Sun, 22 Sep 2024 at 06:57 EDT (139 days away) in Taurus

345.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Sun, 22 Sep 2024 at 08:42 EDT (139 days away) in Virgo

346.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Mon, 23 Sep 2024 at 18:22 EDT (140 days away) in Taurus

347.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 5°50'. Mon, 23 Sep 2024 at 19:22 EDT (140 days away) in Taurus

348.

Lunar occultation of Beta Tauri The Moon will pass in front of Beta Tauri (Elnath), creating a lunar occultation visible from Africa and Western Asia. Mon, 23 Sep 2024 at 22:08 EDT (140 days away) in Taurus

349.

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. Tue, 24 Sep 2024 at 14:50 EDT (141 days away) in Auriga

350.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Tue, 24 Sep 2024 (141 days away) in Sculptor

351.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 4°53'. Wed, 25 Sep 2024 at 07:50 EDT (142 days away) in Gemini

352.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Wed, 25 Sep 2024 at 08:45 EDT (142 days away) in Gemini

353.

Daytime Sextantid meteor shower 2024 The Daytime Sextantid meteor shower reaches its peak. Fri, 27 Sep 2024 (144 days away) in Sextans

354.

Comet C/2023 A3 (Tsuchinshan-ATLAS) passes perihelion Comet C/2023 A3 (Tsuchinshan-ATLAS) makes its closest approach to the Sun. Fri, 27 Sep 2024 (144 days away) in Sextans

355.

47 Tuc is well placed The second brightest globular cluster in the sky, 47 Tuc (NGC 104; mag 4.0), in Tucana culminates at around midnight local time. Fri, 27 Sep 2024 (144 days away) in Tucana

356.

Asteroid 20 Massalia at opposition Asteroid 20 Massalia makes closest approach to the Earth. Sun, 29 Sep 2024 at 12:46 EDT (146 days away) in Pisces

357.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Mon, 30 Sep 2024 at 17:19 EDT (147 days away) in Virgo

358.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Tue, 01 Oct 2024 (148 days away) in Andromeda

359.

Annular solar eclipse There will be an eclipse of the Sun, visible from southern Argentina and southern Chile. Wed, 02 Oct 2024 at 14:45 EDT (149 days away) in Virgo

360.

New Moon The Moon disappears into the Sun's glare for a few days. Wed, 02 Oct 2024 at 14:50 EDT (149 days away) in Virgo