NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea (framoro)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 34 Cas · 34 phi Cas · HD236697 · HD7636 · HD7733 · HD7902 · HD8159 · NGC 436 · NGC 457 · Owl Cluster · The star φ Cas

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NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

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NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

NGC 457 is an open cluster located in the constellation Cassiopeia, almost 2 degrees south of the star δ Cassiopeiae (Ruchbah). It was discovered by William Herschel in 1787. Many of its brightest components, including the star φ Cassiopeiae, on the southern edge of the cluster, are multiple stars. It is a cluster with a very characteristic appearance: its particular shape has made it known as the Owl Cluster: in fact it is dominated by two sixth magnitude stars (one of which is φ Cassiopeiae), from which a concatenation of stars that clearly resemble the wings of a bird in flight; the two sixth stars are the "eyes" of the owl. In reality, it is not clear whether the brightest stars of the cluster, such as φ Cassiopeiae, are part of the cluster or are much closer to us, and show themselves in the direction of the cluster due to a perspective effect. Recent data places φ Cassiopeiae at a distance similar to that of NGC 457, making it a component of the cluster, which is composed of around eighty confirmed stars. The cluster lies in the Perseus Arm of the Milky Way at a distance of about 8000 LY from the Solar System and is believed to be quite young, estimated at around 21 million years.
NGC 436 is an open cluster also discovered by William Herschel, who described it as a "small, narrow cluster of mostly faint stars". It is made up of about thirty stars, is about 10,000 LY away from us and has an estimated age of about 84 million years.

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Status	Advanced success
Started	...
Astrometry.net job	8519294
PixInsight job	IMZR7405DF0W4TP6NAUPEPWJ9X07GIK4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h18m48s.309
RA (top/left)	01h22m25s.100
RA (top/right)	01h22m29s.440
RA (bottom/right)	01h15m02s.873
RA (bottom/left)	01h15m16s.403

Dec (center)	+58°17′22″.10
Dec (top/left)	+57°33′42″.29
Dec (top/right)	+59°01′02″.38
Dec (bottom/right)	+59°00′36″.91
Dec (bottom/left)	+57°33′19″.29

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NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

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NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

NGC 457 (the Owl Cluster/ET Cluster) & NGC 436 in Cassiopea

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