Böhm-Vitense 5-1 (Gary Imm)

Böhm-Vitense 5-1

This rarely imaged object, also known as BV 5-1, PK 119+00.1, and PN G119.3+00.3, is a tiny planetary nebula located 7200 light years away in the constellation of Casseopeia at a declination of +63 degrees. The nebula spans 1 arc-minute in our apparent view, which corresponds to a diameter of 2 light years.

This object was discovered by Dr. Erika Helga Ruth Böhm-Vitense, a German-born American astrophysicist who died in 2017. She is known for her work on Cepheid variables, stellar temperatures, and many other areas of stellar astronomy.

The morphology of this PN is unlike any other that I have imaged. Because they are born out of gas outflows from dying stars, PN are comprised of spherical volumes which usually present themselves as circular or oval projections depending upon our viewing orientation. That is not the case here. I could not find an explanation for this structure in the literature, or in fact any information on this object.

My guess regarding the structure, based on comparing this object to a somewhat similar M76, is that we are are looking at a side-view perspective of a bi-polar nebula, with the white section being the torus around the waist of the nebula, and the bluish sections being the bi-polar OIII lobes. The puzzling thing to me is the straight-line reddish hydrogen segments. I have seen these types of reddish segments in this relative location before, as in M76, but they always take on an arc form. Perhaps the interstellar medium is responsible for deforming the nebula into these straight shapes, or perhaps there are other bi-polar jets causing interaction and deformation. In any case, it is a wonder why this interesting nebula has not yet been studied.

The refractors!
Cloudy Nights
Rarely Imaged Small DSOs
Narrowband imaging
Takahashi Refractors
Planetary Nebulae
ZWO ASI183/QHY183

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Status	Advanced success
Started	...
Astrometry.net job	3016465
PixInsight job	TP5SWZXXN6D1ZQ3HRK67KNSSYKD5UQWI
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h19m59s.238
RA (top/left)	00h21m11s.408
RA (top/right)	00h18m48s.140
RA (bottom/right)	00h18m47s.563
RA (bottom/left)	00h21m09s.713

Dec (center)	+62°59′00″.62
Dec (top/left)	+63°05′13″.63
Dec (top/right)	+63°05′23″.59
Dec (bottom/right)	+62°52′45″.40
Dec (bottom/left)	+62°52′35″.61

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Böhm-Vitense 5-1

Böhm-Vitense 5-1

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Böhm-Vitense 5-1

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