521.

Conjunction of the Moon and Saturn The Moon and Saturn share the same right ascension, at a separation of 26'. Tue, 18 Jun 2019 at 23:45 EDT (1,855 days ago) in Sagittarius

522.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Tue, 18 Jun 2019 (1,855 days ago) in Ophiuchus

523.

Close approach of Mercury and Mars Mercury and Mars pass within 13' of each other. Tue, 18 Jun 2019 at 13:57 EDT (1,855 days ago) in Gemini

524.

Conjunction of Mercury and Mars Mercury and Mars share the same right ascension, at a separation of 14'. Tue, 18 Jun 2019 at 10:35 EDT (1,855 days ago) in Gemini

525.

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. Tue, 18 Jun 2019 at 04:14 EDT (1,855 days ago) in Sagittarius

526.

Mercury at dichotomy Mercury reaches half phase in the evening sky. Mon, 17 Jun 2019 at 22:57 EDT (1,856 days ago) in Gemini

527.

Mercury at highest altitude in evening sky Mercury is bright and well placed in the evening sky. Mon, 17 Jun 2019 (1,855 days ago) in Gemini

528.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Mon, 17 Jun 2019 (1,856 days ago) in Ara

529.

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. Mon, 17 Jun 2019 (1,856 days ago) in Scorpius

530.

Full Moon The Moon reaches full phase and is visible for much of the night. Mon, 17 Jun 2019 at 04:30 EDT (1,856 days ago) in Ophiuchus

531.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Sun, 16 Jun 2019 (1,857 days ago) in Scorpius

532.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Sun, 16 Jun 2019 at 15:24 EDT (1,857 days ago) in Ophiuchus

533.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 1°59'. Sun, 16 Jun 2019 at 14:48 EDT (1,857 days ago) in Ophiuchus

534.

Jupiter at perigee Jupiter reaches its closest point to the Earth – marking the best time to observe it in 1970. Tue, 11 Jun 2019 at 23:03 EDT (1,862 days ago) in Ophiuchus

535.

Messier 92 is well placed The globular cluster M92 (NGC 6341; mag 6.5) in Hercules culminates at around midnight local time. Tue, 11 Jun 2019 (1,862 days ago) in Hercules

536.

Daytime Arietid meteor shower 2019 The Daytime Arietid meteor shower reaches its peak. Mon, 10 Jun 2019 (1,862 days ago) in Aries

537.

Jupiter at opposition Jupiter lies in the opposite direction to the Sun in the sky, making it slightly closer, brighter and larger than at other times. It is also optimally positioned to be observable for much of the night. Mon, 10 Jun 2019 at 11:20 EDT (1,863 days ago) in Ophiuchus

538.

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. Mon, 10 Jun 2019 at 01:59 EDT (1,863 days ago) in Leo

539.

Comet C/2018 R3 (Lemmon) passes perihelion Comet C/2018 R3 (Lemmon) makes its closest approach to the Sun. Sat, 08 Jun 2019 (1,865 days ago) in Camelopardalis

540.

Messier 62 is well placed The globular cluster M62 (NGC 6266; mag 6.4) in Ophiuchus culminates at around midnight local time. Fri, 07 Jun 2019 (1,866 days ago) in Ophiuchus