Sh2 245 HA RGB Part of the Fishhook Nebula (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Sh2-245

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Sh2 245 HA RGB Part of the Fishhook Nebula

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Sh2 245 HA RGB Part of the Fishhook Nebula

The Fishhook is much larger... this is the shank of the hook...

The GalaxyMap compilation is worth a read:

Sometimes called the Fishhook nebula, Sh 2-245 is one of the largest nebulae in apparent extent in the Sharpless catalog. It appears as a bright hydrogen-alpha ridge towards the southern end of the Orion-Eridanus superbubble. The Orion-Eridanus superbubble is ionised by the total ultraviolet radiation from the Ori OB1 association.

A good overview of the Orion-Eridanus bubble. [1]

The Orion-Eridanus bubble is ionised by members of the Ori OB1 association.[2]

The brightest part of this elongated optical feature is about 1 degree wide but extends for at least 10 degrees and possibly extends to the Barnard Loop. [3]

Notes

1. Brown, A. G. A., Hartmann, D., & Burton, W. B. (1995). "The Orion OB1 association. II. The Orion-Eridanus Bubble.", Astronomy and Astrophysics, Vol. 300, 903. [1995A&A...300..903B]

2. Reynolds, R. J. & Ogden, P. M. (1979). "Optical evidence for a very large, expanding shell associated with the I Orion OB association, Barnard's loop, and the high galactic latitude H-alpha filaments in Eridanus", The Astrophysical Journal, Vol. 229, 942-953. [1979ApJ...229..942R]

3. Caswell, J. L. (1976). "A map of the northern sky at 10 MHz", Monthly Notices of the Royal Astronomical Society, Vol. 177, 601-616. [1976MNRAS.177..601C]

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Status	Advanced success
Started	...
Astrometry.net job	3967063
PixInsight job	SUQSF4DZW0KI3LIFQK3TFWIFSRG42LGE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	04h02m33s.10
RA (top/left)	04h04m41s.89
RA (top/right)	04h00m15s.97
RA (bottom/right)	04h00m24s.50
RA (bottom/left)	04h04m50s.90

Dec (center)	+04°07′58″.0
Dec (top/left)	+04°34′19″.4
Dec (top/right)	+04°31′31″.1
Dec (bottom/right)	+03°41′36″.3
Dec (bottom/left)	+03°44′22″.3

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Sh2 245 HA RGB Part of the Fishhook Nebula

Sh2 245 HA RGB Part of the Fishhook Nebula

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Sh2 245 HA RGB Part of the Fishhook Nebula

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