Gamma Cas Nebula, IC63 and IC59 (Roger Nichol)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 27 Cas) · 27 gam Cas · HD236612 · HD5342 · HD5429 · HD5459 · HD5747 · HD5777 · HD5797 · HD5851 · HD5890 · HD6048 · HD6130 · HD6382 · IC 59 · IC 63 · LBN 620 · LBN 622 · LBN 623 · LBN 625 · Sh2-185 · The star Navi (γ Cas · gamma Cas nebula

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Gamma Cas Nebula, IC63 and IC59

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Gamma Cas Nebula, IC63 and IC59

The bright star is Gamma Cassiopeiae (γ Cas), this is the bright star at the middle of the easily recognised 'W' of the Cassiopeia constellation. It is a variable binary star, with a brightness that varies over time - in 1940 it had a brightness of +3.4mag, compared to today's +2.15mag. The variation is caused by changes in a decretion disc formed around the star caused by its rapid spin.

The Cas Nebulae, IC63 and IC59, are faint emission and reflection nebulae approximately 610 light years away from us and about 3 light years from γ Cas, which illuminates and ionizes them. The brighter IC63, also known as 'The ghost of Cassiopeia', is largely hydrogen, while IC59 has a lot more dust in the mix, reflecting starlight.

The wider field version shows several dense clouds of dark dust, and star clusters NGC366, NGC381 and NGC358.

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Title: Cas Nebula wide field

Description: Uncropped image, showing dark dust clouds

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Status	Advanced success
Started	...
Astrometry.net job	6486791
PixInsight job	R7IUHFUQCA4Q1TQ9SZJBBTMI6R6Y3CDJ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h00m13s.520
RA (top/left)	00h52m48s.490
RA (top/right)	01h03m28s.688
RA (bottom/right)	01h07m41s.449
RA (bottom/left)	00h56m47s.228

Dec (center)	+60°53′10″.30
Dec (top/left)	+60°48′47″.74
Dec (top/right)	+60°04′29″.36
Dec (bottom/right)	+60°56′13″.46
Dec (bottom/left)	+61°41′55″.14

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Gamma Cas Nebula, IC63 and IC59

Gamma Cas Nebula, IC63 and IC59

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Gamma Cas Nebula, IC63 and IC59

Gamma Cas Nebula, IC63 and IC59

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