501.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Mon, 05 Jun 2023 (404 days ago) in Aries

502.

Asteroid 11 Parthenope at opposition Asteroid 11 Parthenope makes closest approach to the Earth. Tue, 06 Jun 2023 at 07:58 EDT (403 days ago) in Ophiuchus

503.

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, 06 Jun 2023 at 19:05 EDT (403 days ago) in Sagittarius

504.

Messier 10 is well placed The globular cluster M10 (NGC 6254; mag 6.6) in Ophiuchus culminates at around midnight local time. Tue, 06 Jun 2023 (403 days ago) in Ophiuchus

505.

Messier 62 is well placed The globular cluster M62 (NGC 6266; mag 6.4) in Ophiuchus culminates at around midnight local time. Wed, 07 Jun 2023 (402 days ago) in Ophiuchus

506.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 2°58'. Fri, 09 Jun 2023 at 16:22 EDT (400 days ago) in Aquarius

507.

Close approach of the Moon and Saturn The Moon and Saturn pass close to each other. Fri, 09 Jun 2023 at 18:29 EDT (400 days ago) in Aquarius

508.

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, 10 Jun 2023 at 15:31 EDT (399 days ago) in Aquarius

509.

Daytime Arietid meteor shower 2023 The Daytime Arietid meteor shower reaches its peak. Sat, 10 Jun 2023 (398 days ago) in Aries

510.

Messier 92 is well placed The globular cluster M92 (NGC 6341; mag 6.5) in Hercules culminates at around midnight local time. Sun, 11 Jun 2023 (398 days ago) in Hercules

511.

Close approach of Venus and M44 Venus and M44 pass close to each other. Tue, 13 Jun 2023 at 20:30 EDT (396 days ago) in Cancer

512.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Wed, 14 Jun 2023 at 01:26 EDT (395 days ago) in Aries

513.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 1°30'. Wed, 14 Jun 2023 at 02:36 EDT (395 days ago) in Aries

514.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 4°18'. Fri, 16 Jun 2023 at 16:40 EDT (393 days ago) in Taurus

515.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Fri, 16 Jun 2023 (393 days ago) in Scorpius

516.

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. Sat, 17 Jun 2023 at 09:26 EDT (392 days ago) in Taurus

517.

Saturn enters retrograde motion Saturn reverses its direction of motion across the sky. Sat, 17 Jun 2023 at 12:51 EDT (392 days ago) in Aquarius

518.

The Butterfly cluster is well placed The Butterfly open star cluster (M6, NGC 6405; mag 4.2) in Scorpius culminates at around midnight local time. Sat, 17 Jun 2023 (392 days ago) in Scorpius

519.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Sat, 17 Jun 2023 (392 days ago) in Ara

520.

New Moon The Moon disappears into the Sun's glare for a few days. Sun, 18 Jun 2023 at 00:38 EDT (391 days ago) in Taurus