Rho Ophiuchi Complex (Paul Ricker)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: 13.75 · 19 omi Sco · 20 sig Sco · 21 alf Sco · 22 i Sco · 23 tau Sco · 5 rho Oph · 503 Evelyn · 9 ome Oph · Alniyat · Antares · B229 · B42 · IC 4603 · IC 4604 · IC 4605 · LBN 1100 · LBN 1101 · LBN 1102 · LBN 1103 · LBN 1104 · LBN 1105 · LBN 1106 · LBN 1107 · LBN 1108 · LBN 1109 · LBN 1110 · LBN 1111 · LBN 1112 · LDN 1672 · And 32 more.

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Rho Ophiuchi Complex

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Rho Ophiuchi Complex

The Rho Ophiuchi cloud complex is a nearby (~ 130 pc) star-forming region in Ophiuchus/Scorpius just south of the star ρ Ophiuchi and just north of Antares. It's a lovely, colorful area of the sky, with reflection nebulae illuminated by the bluer ρ Ophiuchi and the redder Antares as well as extensive dust lanes and emission nebulae. Near Antares on the sky (but much more distant) are two globular clusters, M4 at 2.2 kpc and NGC 6144, a much looser and dimmer cluster 8.5 kpc away.

Scorpius is relatively low in the sky for me (~ 23 degrees at meridian passage), and there's a noticeable background light gradient to remove in processing. Some of the residual color in darker areas (esp. north of ρ Ophiuchi) may not be quite right.

Edit: Managed to neutralize the background color gradient with Siril.

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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.

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Status	Advanced success
Started	...
Astrometry.net job	4627242
PixInsight job	XOSTQPETIHMUGKL5892VDE6F64S1ULDG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h28m10s.34
RA (top/left)	16h38m11s.14
RA (top/right)	16h17m43s.38
RA (bottom/right)	16h17m33s.65
RA (bottom/left)	16h39m13s.83

Dec (center)	-24°52′36″.7
Dec (top/left)	-21°15′40″.9
Dec (top/right)	-21°19′39″.7
Dec (bottom/right)	-28°27′16″.3
Dec (bottom/left)	-28°22′34″.7

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