Butterfly Nebula (NGC2346 / PK215+03.1) (DoubleStarPhotography)

Celestial hemisphere: Southern · Constellation: Monoceros (Mon) · Contains: NGC 2346 · PK215+03.1

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Butterfly Nebula (NGC2346 / PK215+03.1)

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Butterfly Nebula (NGC2346 / PK215+03.1)

NGC 2346 is a planetary nebula near the celestial equator in the constellation of Monoceros, less than a degree from Delta Monocerotis. It is informally known as the Butterfly Nebula.

The core nebula is bright and conspicuous, with a visual magnitude of 9.6, and has been extensively studied. Among its most remarkable characteristics is its unusually cool central star, which is a spectroscopic binary, and its unusual shape. The central star is a binary star consisting of an A-type subgiant and a subdwarf O star.The system, which has an orbital period of 16.00±0.03 days, is also variable in nature, probably due to dust in orbit around it. The dust itself is heated by the central star and so NGC 2346 is unusually bright in the infrared part of the spectrum. When one of the two stars evolved into a red giant, it engulfed its companion, which stripped away a ring of material from the larger star's atmosphere. When the red giant's core was exposed, a fast stellar wind inflated two ‘bubbles’ from either side of the ring.

After 10 days of clouds the skies finally cleared for an evening allowing me to squeeze in a bit of imaging again. This image was shot at FL3920 (4x the native FL of my TEC140 refractor). Good tracking with average transparency, but the moon was only a few days pass full phase this night substantially illuminating the sky.

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Status	Advanced success
Started	...
Astrometry.net job	7059256
PixInsight job	IQPWEHCFFGO6UDP4DHFDZ1Y0R1Z8T43E
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h09m23s.590
RA (top/left)	07h09m40s.578
RA (top/right)	07h09m46s.296
RA (bottom/right)	07h09m06s.484
RA (bottom/left)	07h09m00s.842

Dec (center)	-00°48′14″.29
Dec (top/left)	-00°42′33″.59
Dec (top/right)	-00°52′30″.70
Dec (bottom/right)	-00°53′54″.92
Dec (bottom/left)	-00°43′57″.55

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Butterfly Nebula (NGC2346 / PK215+03.1)

Butterfly Nebula (NGC2346 / PK215+03.1)

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Butterfly Nebula (NGC2346 / PK215+03.1)

Butterfly Nebula (NGC2346 / PK215+03.1)

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