RAFGL 2688 Egg Nebula #1 (Molly Wakeling)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: PGC 3097220 · PGC 3099128

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RAFGL 2688 Egg Nebula #1

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RAFGL 2688 Egg Nebula #1

Another from Okie-Tex -- the Egg Nebula!
This infrequently-imaged nebula isn't even in one of the "regular" catalogs -- RAFGL is the Revised Air Force Geophysical Laboratory catalog. The seeing conditions were really terrible at the times I was imaging this, so unfortunately I didn't get any detail, but you can see the X pattern coming off of it, which is very cool!

The Egg Nebula is a bipolar protoplanetary nebula -- protoplanetary is the stage just before the star becomes a planetary nebula, during its late asymptotic giant branch phase. At this point, the star has lost a great deal of its hydrogen envelope. Once the mass loss is high enough, however, it will stop losing additional hydrogen, and the star will burn that hydrogen, raising its temperature, but it's not hot enough to ionize the shell of gas ejected earlier to make it glow like the planetary nebulae we often see. At the same time, the star has some high-velocity stellar winds in specific, collimated directions, which will ultimately shape the future planetary nebula. These stellar winds often create bipolar jets and a series of bow shocks, which are visible in sharper images than mine.

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Status	Advanced success
Started	...
Astrometry.net job	6414400
PixInsight job	VFAR1S2V7ECIBJ33J8EIV0DTK1PHDBVI
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h02m18s.636
RA (top/left)	21h01m52s.903
RA (top/right)	21h01m46s.376
RA (bottom/right)	21h02m44s.232
RA (bottom/left)	21h02m51s.440

Dec (center)	+36°41′38″.95
Dec (top/left)	+36°50′06″.12
Dec (top/right)	+36°34′09″.55
Dec (bottom/right)	+36°33′10″.63
Dec (bottom/left)	+36°49′07″.64

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RAFGL 2688 Egg Nebula #1

RAFGL 2688 Egg Nebula #1

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RAFGL 2688 Egg Nebula #1

RAFGL 2688 Egg Nebula #1

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