Necklace Nebula (Gary Imm)

Celestial hemisphere: Northern · Constellation: Sagitta (Sge)

Necklace Nebula

This object, also known as G54.2-3.4, is a tiny planetary nebula located 15,000 light years away in the constellation of Sagitta at a declination of +17 degrees. This PN spans 25 arc-seconds, which corresponds to an actual diameter of 2 light years. The ring is tilted to our line of sight at an angle of about 60 degrees from face-on.

This PN is unusual because of the bright white stellar-like knots of gas (i.e., the “necklace”) around the rim of the nebula. The nebula is primarily OIII signal, with a minor amount of Ha. The small central star, reddish in color, is barely visible. Scientists believe that this progenitor star is a binary star with an orbital period of about a day.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	3636402
PixInsight job	QG5X0SFXCSFGD7GP6GXT82BABH6MRGUF
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h43m59s.999
RA (top/left)	19h44m28s.411
RA (top/right)	19h43m30s.203
RA (bottom/right)	19h43m31s.129
RA (bottom/left)	19h44m29s.299

Dec (center)	+17°09′02″.36
Dec (top/left)	+17°14′37″.58
Dec (top/right)	+17°14′21″.11
Dec (bottom/right)	+17°03′26″.53
Dec (bottom/left)	+17°03′43″.94

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Necklace Nebula

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