Copeland Septet in Virgo Arp 320 HCG 57 (Mau_Bard)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: Copeland's Septet · HD101025 · HD101059 · HD101110 · NGC 3745 · NGC 3746 · NGC 3748 · NGC 3750 · NGC 3751 · NGC 3753 · NGC 3754 · PGC 1654400 · PGC 1654426 · PGC 1655271 · PGC 1655362 · PGC 1655429 · PGC 1655674 · PGC 1657316 · PGC 1657616 · PGC 1657694 · PGC 1658277 · PGC 1658988 · PGC 1660110 · PGC 1660846 · PGC 1661085 · PGC 1661926 · PGC 1662483 · PGC 1662685 · PGC 1663287 · PGC 1664283 · And 22 more.

Copeland Septet in Virgo Arp 320 HCG 57

This is an experiment in using the Antlia Tri-Band filter on a galactic target. This filter is more fit to emission-nebulae objects that get enriched by its blue band window.

Copeland Septet

Copeland’s Septet, also known as Hickson Compact Group 57 (HCG 57) and Arp 320, is a group of interacting galaxies located in the constellation Leo.

Even though it is called a septet, it is a group of eight, not seven, galaxies that consists of NGC 3748, NGC 3754, NGC 3750, NGC 3751, NGC 3745, NGC 3753, NGC 3746 and PGC 36010. The galaxies are contained within a 5’ area. The group was named after British astronomer Ralph Copeland, who discovered it in April 1874. It lies at an approximate distance of 400 million light years from Earth.

Copeland discovered the group while working for William Parsons, 3rd Earl of Rosse, as an assistant. He discovered the galaxies with the 72-inch Leviathan of Parsonstown, a historic reflector built by Lord Rosse at Birr Castle. The six-foot telescope was the largest telescope in the world between 1845 and 1917, when the 100-inch Hooker Telescope was built at Mount Wilson Observatory in California.

(Excerpted from constellation-guide.com)

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Status	Advanced success
Started	...
Astrometry.net job	7394549
PixInsight job	4QD2X5T7GAJZUP67MST14RO7KPIB67IY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h37m49s.836
RA (top/left)	11h39m22s.429
RA (top/right)	11h36m18s.334
RA (bottom/right)	11h36m17s.793
RA (bottom/left)	11h39m20s.934

Dec (center)	+21°59′24″.85
Dec (top/left)	+22°20′33″.30
Dec (top/right)	+22°20′47″.11
Dec (bottom/right)	+21°38′12″.84
Dec (bottom/left)	+21°38′00″.15

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Copeland Septet in Virgo Arp 320 HCG 57

Copeland Septet in Virgo Arp 320 HCG 57

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Copeland Septet in Virgo Arp 320 HCG 57

Copeland Septet in Virgo Arp 320 HCG 57

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