21.

Comet 260P/McNaught passes perihelion Comet 260P/McNaught makes its closest approach to the Sun. Wed, 11 Sep 2019 (1,688 days ago) in Aries

22.

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. Fri, 13 Sep 2019 at 09:32 EDT (1,686 days ago) in Aquarius

23.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 14 Sep 2019 at 00:32 EDT (1,685 days ago) in Aquarius

24.

Saturn ends retrograde motion Saturn returns to its usual eastward motion after opposition. Wed, 18 Sep 2019 at 04:25 EDT (1,681 days ago) in Sagittarius

25.

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. Sat, 21 Sep 2019 at 22:41 EDT (1,678 days ago) in Orion

26.

September equinox Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. Mon, 23 Sep 2019 at 03:43 EDT (1,676 days ago) in Virgo

27.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Tue, 24 Sep 2019 at 18:00 EDT (1,675 days ago) in Cancer

28.

NGC 55 is well placed NGC 55 (mag 8.2), a barred irregular galaxy in Sculptor culminates at around midnight local time. Wed, 25 Sep 2019 (1,674 days ago) in Sculptor

29.

Comet C/2018 W2 (Africano) reaches peak brightness Comet C/2018 W2 (Africano) is forecast to reach the brightest point in its 2019 apparition. Thu, 26 Sep 2019 (1,673 days ago) in Pegasus

30.

Comet C/2018 W2 (Africano) passes perigee Comet C/2018 W2 (Africano) makes its closest approach to the Earth. Fri, 27 Sep 2019 (1,672 days ago) in Pegasus

31.

Daytime Sextantid meteor shower 2019 The Daytime Sextantid meteor shower reaches its peak. Fri, 27 Sep 2019 (1,672 days ago) in Sextans

32.

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 2019 (1,672 days ago) in Tucana

33.

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, 27 Sep 2019 at 22:23 EDT (1,672 days ago) in Virgo

34.

Asteroid 21 Lutetia at opposition Asteroid 21 Lutetia makes closest approach to the Earth. Sat, 28 Sep 2019 at 03:10 EDT (1,671 days ago) in Pisces

35.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 28 Sep 2019 at 14:27 EDT (1,671 days ago) in Virgo

36.

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. Sat, 28 Sep 2019 at 22:14 EDT (1,671 days ago) in Coma Berenices

37.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 6°14'. Sun, 29 Sep 2019 at 18:01 EDT (1,670 days ago) in Virgo

38.

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, 01 Oct 2019 at 00:12 EDT (1,668 days ago) in Libra

39.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Wed, 02 Oct 2019 (1,667 days ago) in Andromeda

40.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Thu, 03 Oct 2019 at 02:18 EDT (1,666 days ago) in Virgo