NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula) (spazmagi)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: 14 Vul · Dumbbell Nebula · HD189733 · HD345317 · HD345436 · HD345438 · HD345439 · HD345440 · HD345443 · HD345444 · HD345445 · HD345446 · HD345447 · HD345448 · HD345449 · HD345450 · HD345451 · HD345452 · HD345453 · HD345454 · HD345455 · HD345456 · HD345457 · HD345458 · HD345461 · HD345462 · HD345463 · HD345465 · HD345466 · HD345469 · And 10 more.

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NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

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NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

The Dumbbell Nebula (also known as the Apple Core Nebula, Messier 27, and NGC 6853) is a planetary nebula (nebulosity surrounding a white dwarf) in the constellation Vulpecula, at a distance of about 1360 light-years. It was the first such nebula to be discovered, by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and diameter of about 8 arcminutes, it is easily visible in binoculars and is a popular observing target in amateur telescopes.

The Dumbbell Nebula appears shaped like a prolate spheroid and is viewed from our perspective along the plane of its equator. In 1992, Moreno-Corral et al. computed that its rate of expansion angularly was, viewed from our distance, no more than 2.3 arcseconds per century. From this, an upper limit to the age of 14,600 years may be determined. In 1970, Bohuski, Smith, and Weedman found an expansion velocity of 31 km/s. Given its semi-minor axis radius of 1.01 ly, this implies that the kinematic age of the nebula is 9,800 years.

Like many nearby planetary nebulae, the Dumbbell contains knots. Its central region is marked by a pattern of dark and bright cusped knots and their associated dark tails (see picture). The knots vary in appearance from symmetric objects with tails to rather irregular tail-less objects. Similarly to the Helix Nebula and the Eskimo Nebula, the heads of the knots have bright cusps which are local photoionization fronts.

Date: 31 Oct 2022
Subs: 30 x 300s
Scope: Orion 102mm APO
Mount: Skywatcher EQ6-R Pro
Primary Camera: ZWO ASI183MC Pro
Gain: 100
Guide Scope: Williams Optics 50mm UniGuide
Guide Cmaera: ZWO ASI120MM Mini
Other: ASIAIR Plus (3rd Gen)

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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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	6918350
PixInsight job	WRG4V4DLQMTNJJLNYRHKYKOPRUERVHTL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h59m34s.277
RA (top/left)	19h58m05s.211
RA (top/right)	19h58m15s.840
RA (bottom/right)	20h01m02s.789
RA (bottom/left)	20h00m53s.979

Dec (center)	+22°42′31″.38
Dec (top/left)	+23°08′01″.72
Dec (top/right)	+22°15′23″.99
Dec (bottom/right)	+22°16′59″.24
Dec (bottom/left)	+23°09′37″.40

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NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

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NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

NGC 6853 (M27, Dumbbell Nebula, Apple Core Nebula)

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