Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  IC 4603  ·  IC 4604  ·  IC 4605  ·  The star 22Sco  ·  The star ρOph  ·  rho Oph Nebula
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Rho Ophiuchi Nebula, 


            Matthew Sole
Rho Ophiuchi Nebula
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Rho Ophiuchi Nebula

Technical card

Imaging telescopes or lenses: William Optics GT81-II

Imaging cameras: ZWO AIS1600 MM pro

Mounts: SkyWatcher EQ6-R Pro

Guiding telescopes or lenses: William Optics 50mm Guide Scope

Guiding cameras: ZWO ASI1290MM Mini

Focal reducers: William Optics flat 6A III

Filters: ZWO Blue 36mm  ·  ZWO Red 36mm  ·  ZWO Lum 36mm  ·  ZWO Green 36mm

Dates:June 14, 2020June 23, 2020

ZWO Blue 36mm: 143x60" (gain: 76.00)
ZWO Green 36mm: 143x60" (gain: 76.00)
ZWO Lum 36mm: 402x30" (gain: 76.00)
ZWO Red 36mm: 144x60" (gain: 76.00)

Integration: 10.5 hours

Avg. Moon age: 12.75 days

Avg. Moon phase: 22.02%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details

Astrometry.net job: 3638812

RA center: 16h 26' 42"

DEC center: -24° 13' 58"

Pixel scale: 2.036 arcsec/pixel

Orientation: 125.938 degrees

Field radius: 1.628 degrees

Resolution: 4606x3455

Data source: Backyard


The Rho Ophiuchi Nebula.

Normally seen a spectacular wide-field target, here it is in a narrower view captured with my GT81 over a few nights in June.

10.5 hours total


Sky plot

Sky plot


Rho Ophiuchi Nebula, 


            Matthew Sole