NGC 2261 Hubble's Variable Nebula (Molly Wakeling)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: Hubble's Nebula · Hubble's variable neb · NGC 2261

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NGC 2261 Hubble's Variable Nebula

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NGC 2261 Hubble's Variable Nebula

Discovered in 1783 by William Herschel, this fascinating nebula changes its shape visibly over periods of weeks of months. The star on the left end of the cloud, R Monocerotis, is the one lighting it up. It is named for Edwin Hubble (of Hubble Space Telescope fame), who studied it at Yerkes, Mt. Wilson, and Palomar in the first half of the 20th century. It is thought that the varying appearance is due to dense knots of dust near the star R Mon casting shadows as they orbit the star. It lies about 2,500 lightyears away from us in the constellation Monoceros, which is east of the more-familiar Orion.

A lot of the data I got on this one turned out not to be very good, due to focus issues, moonlight, my flat files not working very well, and other problems. But it came out okay!

RGB: 19x600s (3h10m)

L: 39x180s (1h57m)

Broadband under Bortle 7/8/9
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Status	Advanced success
Started	...
Astrometry.net job	3403434
PixInsight job	G04NTXNZ7B87Z6JPJOA0EXMT7FRXSAHZ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h39m10s.159
RA (top/left)	06h39m51s.915
RA (top/right)	06h39m42s.324
RA (bottom/right)	06h38m28s.266
RA (bottom/left)	06h38m38s.100

Dec (center)	+08°44′19″.91
Dec (top/left)	+08°31′24″.29
Dec (top/right)	+08°58′51″.39
Dec (bottom/right)	+08°57′15″.85
Dec (bottom/left)	+08°29′48″.52

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NGC 2261 Hubble's Variable Nebula

NGC 2261 Hubble's Variable Nebula

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NGC 2261 Hubble's Variable Nebula

NGC 2261 Hubble's Variable Nebula

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