M17 Swan Nebula #7 (Molly Wakeling)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B304 · B307 · B92 · B93 · Checkmark Nebula · Eagle Nebula · IC 4701 · IC 4703 · IC 4715 · LBN 51 · LBN 52 · LBN 55 · LBN 56 · LBN 57 · LBN 59 · LBN 60 · LBN 61 · LBN 62 · LBN 64 · LBN 66 · LBN 67 · LBN 68 · LDN 322 · LDN 323 · LDN 327 · LDN 328 · LDN 331 · LDN 332 · LDN 335 · LDN 336 · And 40 more.

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M17 Swan Nebula #7

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M17 Swan Nebula #7

Another backyard project -- M17, the Swan Nebula!

I went back and forth between the Eagle Nebula and the Swan Nebula during the latter half of June and a little bit of July, although the distortion on my 50-200mm Nikon lens turned out to be a bit too much to make a mosaic.

The Swan Nebula, which goes by several names including Omega, Checkmark, and Horseshoe, lies between 5,000-6,000 lightyears away in the constellation Sagittarius, right toward the heart of the Milky Way (hence the great numbers of stars!). Its structure is similar to the Orion Nebula, although we're seeing it from the side instead of face-on. An open cluster of hot, young stars energizes the gases within to glow.

Details:

Date: 14, 15, 16, 28, 29, 30 June, 10, 11 July 2020

Location: East Bay area backyard, CA

Object: M17 Swan Nebula

Attempt: 7

Camera: ZWO ASI294MC Pro

Telescope: Nikon 50-200mm f/4.5-5.6 @ 200mm, f/something

Accessories: Orion SkyGlow filter

Mount: Celestron AVX

Guide scope: Orion 50mm mini-guider

Guide camera: QHY5

Subframes: 140x180s (7h)

Gain/ISO: 120

Acquisition method: Sequence Generator Pro

Stacking program: PixInsight 1.8.8-5

Post-Processing program: PixInsight 1.8.8-5

Darks: 100

Biases: 0

Flats: 0

Temperature: -20C

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Status	Advanced success
Started	...
Astrometry.net job	3768316
PixInsight job	PH1W0IIJGEKVKZ6TDOVS4L326292A6C3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m41s.58
RA (top/left)	18h28m36s.83
RA (top/right)	18h28m48s.78
RA (bottom/right)	18h12m58s.70
RA (bottom/left)	18h12m20s.50

Dec (center)	-16°13′02″.7
Dec (top/left)	-19°03′32″.7
Dec (top/right)	-13°25′57″.5
Dec (bottom/right)	-13°21′44″.5
Dec (bottom/left)	-18°59′12″.1

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M17 Swan Nebula #7

M17 Swan Nebula #7

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M17 Swan Nebula #7

M17 Swan Nebula #7

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