Sh2-173 Phantom of the Opera and Ou 2 (Randy Lindstrom)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 12 Cas · HD1383 · HD1613 · HD1697 · HD1917 · HD2535 · HD2654 · LBN 592 · LBN 593 · LDN 1282 · LDN 1283 · NGC 103 · NGC 136 · Sh2-173 · The star 12 Cas

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Sh2-173 Phantom of the Opera and Ou 2

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Sh2-173 Phantom of the Opera and Ou 2

This photo shows 2 objects I've seen only one other time paired and called out in a single image. On the lower left is planetary nebula Ou 2 - PN-G 120.4-01.3. Shown in the upper right is the diffuse emission nebula Sh2-173 -- often referred to as the Phantom of the Opera nebula. Both objects have extremely faint signals in the broadband RGB channels. The PN has a strong signal in O3 and is visible in H-alpha. Sh2-173 is primarily visible in the Ha and S2 channels. Ou2 was discovered in 2010 by Nicolas Outters, a Swiss amateur astrophotographer. Sh2-173 was discovered by Stewart Sharpless and appeared in his 1959 nebula catalog. The narrowband channels of this rendition are presented in an HSO color palette.

Acquisition Dates: 26, 27, 28, 29 Oct, 1 Nov 2022

Frames -- All gain 100,  -5°C, bin 1x1:
Ha: 75x300" (6h 15')
OIII: 58x300" (4h 50')
SII: 52x300" (4h 20')
R: 79x60" (1h 19')
G: 68x60" (1h 8')
B: 60x60" (1h)

Integration: 18h 52'

Bortle Dark-Sky Scale: 4

Final
Original
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C

Title: Full Uncropped Image

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NOVAC
Imaged with Voyager

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Status	Advanced success
Started	...
Astrometry.net job	6532627
PixInsight job	5NI71NLDL6X1QZATXTW6YDEEMHZC1MZD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h25m15s.49
RA (top/left)	00h30m50s.73
RA (top/right)	00h16m06s.80
RA (bottom/right)	00h19m59s.19
RA (bottom/left)	00h34m16s.43

Dec (center)	+61°38′39″.4
Dec (top/left)	+62°32′15″.4
Dec (top/right)	+61°52′23″.2
Dec (bottom/right)	+60°44′13″.7
Dec (bottom/left)	+61°22′43″.3

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Sh2-173 Phantom of the Opera and Ou 2

Sh2-173 Phantom of the Opera and Ou 2

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