241.

Mars at perihelion Mars passes its orbit's closest point to the Sun. Sun, 16 Sep 2018 at 08:53 EDT (2,101 days ago) in Capricornus

242.

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 (2,101 days ago) in Ophiuchus

243.

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 (2,100 days ago) in Sagittarius

244.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Mon, 17 Sep 2018 at 12:43 EDT (2,100 days ago) in Sagittarius

245.

Asteroid 30 Urania at opposition Asteroid 30 Urania makes closest approach to the Earth. Wed, 19 Sep 2018 at 07:58 EDT (2,098 days ago) in Pisces

246.

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, 19 Sep 2018 at 20:53 EDT (2,098 days ago) in Capricornus

247.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Thu, 20 Sep 2018 at 01:19 EDT (2,097 days ago) in Capricornus

248.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 4°46'. Thu, 20 Sep 2018 at 02:40 EDT (2,097 days ago) in Capricornus

249.

Mercury at superior solar conjunction Mercury passes around the far side of the Sun. Thu, 20 Sep 2018 at 22:01 EDT (2,097 days ago) in Virgo

250.

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, 21 Sep 2018 at 20:56 EDT (2,096 days ago) in Capricornus

251.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Sat, 22 Sep 2018 at 21:48 EDT (2,095 days ago) in Virgo

252.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 24 Sep 2018 at 22:52 EDT (2,093 days ago) in Pisces

253.

Venus at greatest brightness Venus reaches its greatest brightness in the evening sky. Tue, 25 Sep 2018 at 00:18 EDT (2,092 days ago) in Virgo

254.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Tue, 25 Sep 2018 (2,092 days ago) in Sculptor

255.

Daytime Sextantid meteor shower 2018 The Daytime Sextantid meteor shower reaches its peak. Thu, 27 Sep 2018 (2,090 days ago) in Sextans

256.

136472 Makemake at solar conjunction 136472 Makemake is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Thu, 27 Sep 2018 at 15:46 EDT (2,090 days ago) in Coma Berenices

257.

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. Thu, 27 Sep 2018 (2,090 days ago) in Tucana

258.

Close approach of the Moon and Collinder 50 The Moon and Collinder 50 pass close to each other. Sat, 29 Sep 2018 at 23:11 EDT (2,088 days ago) in Taurus

259.

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, 02 Oct 2018 at 05:45 EDT (2,085 days ago) in Gemini

260.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Tue, 02 Oct 2018 (2,085 days ago) in Andromeda