241.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Mon, 30 Sep 2024 at 17:19 EDT (597 days ago) in Virgo

242.

Asteroid 20 Massalia at opposition Asteroid 20 Massalia makes closest approach to the Earth. Sun, 29 Sep 2024 at 12:46 EDT (598 days ago) in Pisces

243.

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 (600 days ago) in Tucana

244.

Daytime Sextantid meteor shower 2024 The Daytime Sextantid meteor shower reaches its peak. Fri, 27 Sep 2024 (600 days ago) in Sextans

245.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Wed, 25 Sep 2024 at 08:45 EDT (602 days ago) in Gemini

246.

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 (602 days ago) in Gemini

247.

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 (603 days ago) in Sculptor

248.

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 (603 days ago) in Auriga

249.

Lunar occultation of Beta Tauri The Moon will pass in front of Beta Tauri (Elnath), creating a lunar occultation visible from parts of Africa and Western Asia. Mon, 23 Sep 2024 at 22:08 EDT (604 days ago) in Taurus

250.

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 (604 days ago) in Taurus

251.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Mon, 23 Sep 2024 at 18:22 EDT (604 days ago) in Taurus

252.

September equinox Day and night have equal length: the beginning of astronomical autumn in the northern hemisphere. Sun, 22 Sep 2024 at 08:42 EDT (605 days ago) in Virgo

253.

Close approach of the Moon and M45 The Moon and M45 pass close to each other. Sun, 22 Sep 2024 at 06:57 EDT (605 days ago) in Taurus

254.

Neptune at opposition Neptune is optimally positioned for observation. Fri, 20 Sep 2024 at 20:08 EDT (607 days ago) in Pisces

255.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, appearing larger than at other times of the month – though only very fractionally. Wed, 18 Sep 2024 at 09:22 EDT (609 days ago) in Pisces

256.

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 (609 days ago) in Pisces

257.

Partial lunar eclipse There will be an eclipse of the Moon, visible from the Americas, Antarctica, Africa, Europe, Western Asia and south-western Russia. Tue, 17 Sep 2024 at 22:45 EDT (610 days ago) in Pisces

258.

Full Moon The Moon reaches full phase and is visible for much of the night. Tue, 17 Sep 2024 at 22:34 EDT (610 days ago) in Pisces

259.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 18'. Tue, 17 Sep 2024 at 06:21 EDT (610 days ago) in Aquarius

260.

Lunar occultation of Saturn The Moon will pass in front of Saturn, creating a lunar occultation visible from countries and territories including the Contiguous United States, Australia, Canada and Mexico amongst others. Tue, 17 Sep 2024 at 06:07 EDT (610 days ago) in Aquarius