501.

New Moon The Moon disappears into the Sun's glare for a few days. Fri, 05 Apr 2019 at 04:51 EDT (1,959 days ago) in Cetus

502.

Asteroid 2 Pallas at opposition Asteroid 2 Pallas makes closest approach to the Earth. Fri, 05 Apr 2019 at 10:22 EDT (1,959 days ago) in Bootes

503.

Messier 94 is well placed M94 (mag 8.2), a spiral galaxy in Canes Venatici culminates at around midnight local time. Fri, 05 Apr 2019 (1,959 days ago) in Canes Venatici

504.

The Jewel Box cluster is well placed The Jewel Box open star cluster (NGC 4755, also known as the Kappa Crucis Cluster; mag 4.2) in Crux culminates at around midnight local time. Fri, 05 Apr 2019 (1,959 days ago) in Crux

505.

Mercury at highest altitude in morning sky Mercury is bright and well placed in the dawn sky. Sat, 06 Apr 2019 (1,958 days ago) in Aquarius

506.

Conjunction of the Moon and Mars The Moon and Mars share the same right ascension, at a separation of 4°43'. Tue, 09 Apr 2019 at 02:39 EDT (1,955 days ago) in Taurus

507.

Close approach of the Moon and Mars The Moon and Mars pass close to each other. Tue, 09 Apr 2019 at 04:49 EDT (1,955 days ago) in Taurus

508.

Supernova SN2019dfa discovered A new supernova has been discovered in IC 582. Tue, 09 Apr 2019 (1,954 days ago)

509.

Conjunction of Venus and Neptune Venus and Neptune share the same right ascension, at a separation of 18'. Tue, 09 Apr 2019 at 23:46 EDT (1,955 days ago) in Aquarius

510.

Mercury at aphelion Mercury passes the furthest point along its orbit from the Sun. Wed, 10 Apr 2019 at 03:53 EDT (1,954 days ago) in Aquarius

511.

Jupiter enters retrograde motion Jupiter reverses its direction of motion across the sky. Wed, 10 Apr 2019 at 12:52 EDT (1,954 days ago) in Ophiuchus

512.

Mercury at greatest elongation west Mercury is bright and well placed in the dawn sky. Thu, 11 Apr 2019 at 11:45 EDT (1,953 days ago) in Aquarius

513.

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. Fri, 12 Apr 2019 at 15:06 EDT (1,952 days ago) in Gemini

514.

Mercury at dichotomy Mercury reaches half phase in the dawn sky. Fri, 12 Apr 2019 at 21:22 EDT (1,952 days ago) in Aquarius

515.

Close approach of the Moon and M44 The Moon and M44 pass close to each other. Sat, 13 Apr 2019 at 16:46 EDT (1,951 days ago) in Cancer

516.

Centaurus A is well placed Centaurus A (NGC 5128; mag 7.0) culminates at around midnight local time. Sat, 13 Apr 2019 (1,951 days ago) in Centaurus

517.

136199 Eris at solar conjunction 136199 Eris is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Sat, 13 Apr 2019 at 23:07 EDT (1,951 days ago) in Cetus

518.

Omega Centauri is well placed The brightest globular cluster in the sky, Omega Centauri (mag 3.6) culminates at around midnight local time. Sun, 14 Apr 2019 (1,950 days ago) in Centaurus

519.

The Whirlpool Galaxy is well placed The Whirlpool Galaxy M51 (NGC 5194; mag 8.4) in Canes Venatici culminates at around midnight local time. Sun, 14 Apr 2019 (1,950 days ago) in Canes Venatici

520.

136108 Haumea at opposition 136108 Haumea lies in the opposite direction to the Sun in the sky, making it optimally positioned to be observable for much of the night. Tue, 16 Apr 2019 at 04:16 EDT (1,948 days ago) in Bootes