501.

Messier 81 is well placed Bode's Galaxy M81 (NGC 3031; mag 6.9) in Ursa Major culminates at around midnight local time. Fri, 19 Feb 2021 (1,244 days ago) in Ursa Major

502.

Venus at aphelion Venus passes the furthest point along its orbit from the Sun. Fri, 19 Feb 2021 at 22:05 EDT (1,244 days ago) in Capricornus

503.

The cluster NGC 3114 is well placed The open star cluster NGC 3114 (mag 4.2) in Carina culminates at around midnight local time. Sat, 20 Feb 2021 (1,243 days ago) in Carina

504.

Asteroid 29 Amphitrite at opposition Asteroid 29 Amphitrite makes closest approach to the Earth. Mon, 22 Feb 2021 at 04:34 EDT (1,241 days ago) in Leo

505.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Fri, 26 Feb 2021 (1,237 days ago) in Capricornus

506.

Full Moon The Moon reaches full phase and is visible for much of the night. Sat, 27 Feb 2021 at 03:17 EDT (1,236 days ago) in Leo

507.

Comet C/2021 D1 (SWAN) passes perihelion Comet C/2021 D1 (SWAN) makes its closest approach to the Sun. Sat, 27 Feb 2021 (1,236 days ago) in Pegasus

508.

The cluster IC 2581 is well placed The open star cluster IC 2581 (mag 4.0) in Carina culminates at around midnight local time. Sat, 27 Feb 2021 (1,236 days ago) in Carina

509.

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. Sun, 28 Feb 2021 at 22:57 EDT (1,235 days ago) in Virgo

510.

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. Tue, 02 Mar 2021 at 00:17 EDT (1,233 days ago) in Virgo

511.

Comet C/2020 R4 (ATLAS) passes perihelion Comet C/2020 R4 (ATLAS) makes its closest approach to the Sun. Tue, 02 Mar 2021 (1,233 days ago) in Aquarius

512.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Tue, 02 Mar 2021 at 09:18 EDT (1,233 days ago) in Capricornus

513.

Asteroid 4 Vesta at opposition Asteroid 4 Vesta makes closest approach to the Earth. Wed, 03 Mar 2021 at 16:34 EDT (1,232 days ago) in Leo

514.

The Theta Carinae cluster is well placed The Theta Carinae open star cluster (IC 2602, also known as the Southern Pleiades; mag 1.9) culminates at around midnight local time. Wed, 03 Mar 2021 (1,232 days ago) in Carina

515.

Lunar occultation of Beta1 Scorpii The Moon will pass in front of Beta1 Scorpii (Acrab), creating a lunar occultation visible from Sub-Saharan Africa and Brazil. Thu, 04 Mar 2021 at 23:37 EDT (1,230 days ago) in Scorpius

516.

Close approach of Jupiter and Mercury Jupiter and Mercury pass within 19' of each other. Fri, 05 Mar 2021 at 00:54 EDT (1,230 days ago) in Capricornus

517.

Conjunction of Jupiter and Mercury Jupiter and Mercury share the same right ascension, at a separation of 19'. Fri, 05 Mar 2021 at 01:45 EDT (1,230 days ago) in Capricornus

518.

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. Fri, 05 Mar 2021 at 20:30 EDT (1,230 days ago) in Ophiuchus

519.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Sat, 06 Mar 2021 at 04:58 EDT (1,229 days ago) in Capricornus

520.

Lunar occultation of Sigma Sagittarii The Moon will pass in front of Sigma Sagittarii (Nunki), creating a lunar occultation visible from Kazakhstan. Sun, 07 Mar 2021 at 19:49 EDT (1,228 days ago) in Sagittarius