Sh2 84 HA RGB (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Sagitta (Sge) · Contains: Sh2-84

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Sh2 84 HA RGB

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Sh2 84 HA RGB

From Galaxymap:

This HII region, also called LBN 131, is near in the sky to the Wolf-Rayet star WR 128. Both Sharpless and Avedisova list WR 128 as an ionising star. However, there is some controversy about whether Sh 2-84 is part of the ring nebula surrounding this star or lies at another distance.

A look at this region in hydrogen-alpha reveals that although WR 128 lies in this direction, Sh 2-84 appears to be the brightest part of an enormous ring of ionised gas that is not centred on WR 128 but may instead surround the O7.5 I supergiant QZ Sge. Given the size of the ring it may be much closer than the Wolf-Rayet star.

It also seems possible that both QZ Sge and WR 128 contribute to the nebulosity seen in this direction and so Sh 2-84 is not a single object.

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Status	Advanced success
Started	...
PixInsight job	M63YPA1FYFCRTYCTDKBY6EZY7301WFVY
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h49m05s.72
RA (top/left)	19h50m23s.77
RA (top/right)	19h47m48s.75
RA (bottom/right)	19h47m47s.94
RA (bottom/left)	19h50m22s.42

Dec (center)	+18°23′04″.9
Dec (top/left)	+18°39′48″.1
Dec (top/right)	+18°40′04″.9
Dec (bottom/right)	+18°06′20″.0
Dec (bottom/left)	+18°06′03″.8

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