241.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Sun, 02 Sep 2018 at 05:42 EDT (2,086 days ago) in Leo

242.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Sun, 02 Sep 2018 at 17:45 EDT (2,086 days ago) in Taurus

243.

Lunar occultation of Aldebaran The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from Greenland, Iceland and Canada. Sun, 02 Sep 2018 at 21:36 EDT (2,086 days ago) in Taurus

244.

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. Sun, 02 Sep 2018 at 22:37 EDT (2,086 days ago) in Taurus

245.

Venus at aphelion Venus passes the furthest point along its orbit from the Sun. Wed, 05 Sep 2018 at 07:32 EDT (2,083 days ago) in Virgo

246.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Thu, 06 Sep 2018 at 07:19 EDT (2,082 days ago) in Sagittarius

247.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Thu, 06 Sep 2018 at 22:26 EDT (2,082 days ago) in Cancer

248.

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, 07 Sep 2018 at 14:18 EDT (2,081 days ago) in Aquarius

249.

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. Fri, 07 Sep 2018 at 21:19 EDT (2,081 days ago) in Leo

250.

September ε-Perseid meteor shower 2018 The September ε-Perseid meteor shower reaches its peak. Sun, 09 Sep 2018 (2,079 days ago) in Perseus

251.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 09 Sep 2018 at 14:02 EDT (2,079 days ago) in Leo

252.

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. Tue, 11 Sep 2018 at 22:12 EDT (2,077 days ago) in Virgo

253.

Comet 21P/Giacobini-Zinner passes perihelion Comet 21P/Giacobini-Zinner makes its closest approach to the Sun. Thu, 13 Sep 2018 (2,075 days ago) in Auriga

254.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 4°22'. Thu, 13 Sep 2018 at 22:19 EDT (2,075 days ago) in Libra

255.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Fri, 14 Sep 2018 at 00:43 EDT (2,074 days ago) in Libra

256.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Sun, 16 Sep 2018 at 08:53 EDT (2,072 days ago) in Capricornus

257.

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. Sun, 16 Sep 2018 at 19:15 EDT (2,072 days ago) in Ophiuchus

258.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°03'. Mon, 17 Sep 2018 at 12:29 EDT (2,071 days ago) in Sagittarius

259.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Mon, 17 Sep 2018 at 12:43 EDT (2,071 days ago) in Sagittarius

260.

Asteroid 30 Urania at opposition Asteroid 30 Urania makes closest approach to the Earth. Wed, 19 Sep 2018 at 07:58 EDT (2,069 days ago) in Pisces