501.

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. Sat, 05 Oct 2019 at 12:47 EDT (1,746 days ago) in Sagittarius

502.

NGC 253 is well placed The Sculptor Galaxy NGC 253 (mag 7.1) culminates at around midnight local time. Thu, 03 Oct 2019 (1,748 days ago) in Sculptor

503.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Thu, 03 Oct 2019 at 16:56 EDT (1,748 days ago) in Ophiuchus

504.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 1°52'. Thu, 03 Oct 2019 at 16:22 EDT (1,748 days ago) in Ophiuchus

505.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Thu, 03 Oct 2019 at 02:18 EDT (1,748 days ago) in Virgo

506.

The Andromeda Galaxy is well placed The Andromeda Galaxy M31 (mag 3.4) culminates at around midnight local time. Wed, 02 Oct 2019 (1,749 days ago) in Andromeda

507.

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 (1,750 days ago) in Libra

508.

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 (1,752 days ago) in Virgo

509.

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 22:09 EDT (1,753 days ago) in Coma Berenices

510.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 28 Sep 2019 at 14:27 EDT (1,753 days ago) in Virgo

511.

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 (1,754 days ago) in Virgo

512.

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 (1,754 days ago) in Tucana

513.

Daytime Sextantid meteor shower 2019 The Daytime Sextantid meteor shower reaches its peak. Fri, 27 Sep 2019 (1,754 days ago) in Sextans

514.

Asteroid 21 Lutetia at opposition Asteroid 21 Lutetia makes closest approach to the Earth. Fri, 27 Sep 2019 at 12:46 EDT (1,754 days ago) in Pisces

515.

Comet C/2018 W2 (Africano) passes perigee Comet C/2018 W2 (Africano) makes its closest approach to the Earth. Fri, 27 Sep 2019 (1,754 days ago) in Pegasus

516.

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 (1,755 days ago) in Pegasus

517.

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 (1,756 days ago) in Sculptor

518.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Tue, 24 Sep 2019 at 18:00 EDT (1,757 days ago) in Cancer

519.

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 (1,758 days ago) in Virgo

520.

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 (1,760 days ago) in Orion