501.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Mon, 18 Jun 2018 (2,221 days ago) in Ophiuchus

502.

Asteroid 4 Vesta at opposition Asteroid 4 Vesta makes closest approach to the Earth. Mon, 18 Jun 2018 at 19:58 EDT (2,221 days ago) in Sagittarius

503.

Neptune enters retrograde motion Neptune reverses its direction of motion across the sky. Mon, 18 Jun 2018 at 19:45 EDT (2,221 days ago) in Aquarius

504.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Sun, 17 Jun 2018 (2,222 days ago) in Ara

505.

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. Sun, 17 Jun 2018 (2,222 days ago) in Scorpius

506.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Sat, 16 Jun 2018 (2,223 days ago) in Scorpius

507.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sat, 16 Jun 2018 at 15:49 EDT (2,223 days ago) in Cancer

508.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 2°20'. Sat, 16 Jun 2018 at 09:11 EDT (2,223 days ago) in Cancer

509.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Sat, 16 Jun 2018 at 08:38 EDT (2,223 days ago) in Cancer

510.

Asteroid 9 Metis at opposition Asteroid 9 Metis makes closest approach to the Earth. Sat, 16 Jun 2018 at 07:58 EDT (2,223 days ago) in Ophiuchus

511.

Asteroid 29 Amphitrite at opposition Asteroid 29 Amphitrite makes closest approach to the Earth. Fri, 15 Jun 2018 at 05:34 EDT (2,224 days ago) in Scorpius

512.

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. Thu, 14 Jun 2018 at 19:52 EDT (2,225 days ago) in Gemini

513.

New Moon The Moon disappears into the Sun's glare for a few days. Wed, 13 Jun 2018 at 15:44 EDT (2,226 days ago) in Taurus

514.

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, 12 Jun 2018 at 18:16 EDT (2,227 days ago) in Taurus

515.

Messier 92 is well placed The globular cluster M92 (NGC 6341; mag 6.5) in Hercules culminates at around midnight local time. Mon, 11 Jun 2018 (2,228 days ago) in Hercules

516.

Daytime Arietid meteor shower 2018 The Daytime Arietid meteor shower reaches its peak. Sun, 10 Jun 2018 (2,229 days ago) in Aries

517.

Messier 62 is well placed The globular cluster M62 (NGC 6266; mag 6.4) in Ophiuchus culminates at around midnight local time. Thu, 07 Jun 2018 (2,232 days ago) in Ophiuchus

518.

Messier 10 is well placed The globular cluster M10 (NGC 6254; mag 6.6) in Ophiuchus culminates at around midnight local time. Wed, 06 Jun 2018 (2,233 days ago) in Ophiuchus

519.

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. Wed, 06 Jun 2018 at 14:32 EDT (2,233 days ago) in Aquarius

520.

Mercury at perihelion Mercury passes its orbit's closest point to the Sun. Wed, 06 Jun 2018 at 06:45 EDT (2,233 days ago) in Taurus