521.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 2°35'. Tue, 16 Jun 2026 at 15:33 EDT (28 days ago) in Gemini

522.

NGC 6388 is well placed The globular cluster NGC 6388 (mag 6.8) in Scorpius culminates at around midnight local time. Tue, 16 Jun 2026 (28 days ago) in Scorpius

523.

Conjunction of the Moon and Jupiter The Moon and Jupiter share the same right ascension, at a separation of 2°32'. Wed, 17 Jun 2026 at 02:52 EDT (27 days ago) in Gemini

524.

Close approach of the Moon and Jupiter The Moon and Jupiter pass close to each other. Wed, 17 Jun 2026 at 03:58 EDT (27 days ago) in Gemini

525.

Conjunction of the Moon and Venus The Moon and Venus share the same right ascension, at a separation of 17'. Wed, 17 Jun 2026 at 16:20 EDT (27 days ago) in Cancer

526.

Close approach of the Moon and Venus The Moon and Venus pass close to each other. Wed, 17 Jun 2026 at 16:30 EDT (27 days ago) in Cancer

527.

Lunar occultation of Venus The Moon will pass in front of Venus, creating a lunar occultation visible from countries and territories including the Contiguous United States, Canada, Brazil and Venezuela amongst others. Wed, 17 Jun 2026 at 16:30 EDT (27 days ago) in Cancer

528.

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. Wed, 17 Jun 2026 (27 days ago) in Scorpius

529.

NGC 6397 is well placed The globular cluster NGC 6397 (mag 5.6) in Ara culminates at around midnight local time. Wed, 17 Jun 2026 (27 days ago) in Ara

530.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Wed, 17 Jun 2026 at 20:52 EDT (27 days ago) in Cancer

531.

The cluster IC 4665 is well placed The open star cluster IC 4665 (mag 4.2) in Ophiuchus culminates at around midnight local time. Thu, 18 Jun 2026 (26 days ago) in Ophiuchus

532.

Lunar occultation of Regulus The Moon will pass in front of Regulus (Alpha Leonis), creating a lunar occultation visible from countries and territories including South Africa, Mozambique, Madagascar and Zimbabwe amongst others. Fri, 19 Jun 2026 at 10:55 EDT (25 days ago) in Leo

533.

Close approach of Venus and M44 Venus and M44 pass close to each other. Fri, 19 Jun 2026 at 22:31 EDT (25 days ago) in Cancer

534.

The Ptolemy cluster is well placed The Ptolemy Cluster (M7, NGC 6475; mag 3.3) in Scorpius culminates at around midnight local time. Sat, 20 Jun 2026 (24 days ago) in Scorpius

535.

June solstice 21 June will be the longest day of 2026 in the northern hemisphere. Sun, 21 Jun 2026 at 04:27 EDT (23 days ago) in Taurus

536.

Moon at First Quarter The Moon reaches first quarter phase – appearing high in the sky at sunset and remaining visible until around midnight. Sun, 21 Jun 2026 at 17:55 EDT (23 days ago) in Virgo

537.

The Lagoon Nebula is well placed The Lagoon Nebula (M8; mag 5.8) in Sagittarius culminates at around midnight local time. Tue, 23 Jun 2026 (21 days ago) in Sagittarius

538.

NGC 6541 is well placed The globular cluster NGC 6541 (mag 6.6) in Corona Australis culminates at around midnight local time. Wed, 24 Jun 2026 (20 days ago) in Corona Australis

539.

Comet 78P/Gehrels passes perihelion Comet 78P/Gehrels makes its closest approach to the Sun. Thu, 25 Jun 2026 (19 days ago) in Taurus

540.

Lunar occultation of Antares The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from countries and territories including Antarctica, Australia, New Zealand and Tasmania amongst others. Sat, 27 Jun 2026 at 11:08 EDT (17 days ago) in Scorpius