Abell 30 "The Born Again Nebula" (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Cancer (Cnc) · Contains: PK208+33.1

Abell 30 "The Born Again Nebula"

A complicated PN with little Hydrogen (very even in Ha) and a binary star. I focused on the O-III.

Eight planetary nebulae have been identified as `born-again', a class of object typified by knotty secondary ejecta having low masses with nearly no hydrogen. Abell 30, the archetype of the class, also belongs to a small subset of planetary nebulae that exhibit extreme abundance discrepancy factors (where Abell 30 is the most extreme), a phenomenon strongly linked to binary star interactions. We report the presence of light curve brightness variations having a period of 1.060 days that are highly suggestive of a binary central star in Abell 30. If confirmed, this detection supports the proposed link between binary central stars and extreme abundance discrepancies.

From:

https://arxiv.org/abs/2008.01488

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Status	Advanced success
Started	...
Astrometry.net job	5741218
PixInsight job	J4UU12SKD0VRLF82N8ZF0ANGLXTCQLZA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	08h46m53s.426
RA (top/left)	08h46m38s.879
RA (top/right)	08h47m07s.763
RA (bottom/right)	08h47m07s.854
RA (bottom/left)	08h46m38s.903

Dec (center)	+17°52′47″.43
Dec (top/left)	+17°49′19″.60
Dec (top/right)	+17°49′18″.85
Dec (bottom/right)	+17°56′12″.51
Dec (bottom/left)	+17°56′12″.93

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