Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  13.25  ·  19 omi Sco  ·  20 sig Sco  ·  22 i Sco  ·  37 Fides  ·  5 rho Oph  ·  Alniyat  ·  B42  ·  IC 4603  ·  IC 4604  ·  IC 4605  ·  M 4  ·  NGC 6121  ·  NGC 6144  ·  Scorpius  ·  Sh2-9  ·  The star 22Sco  ·  The star Al Niyat (σSco)  ·  The star οSco  ·  The star ρOph  ·  rho Oph nebula
Getting plate-solving status, please wait...
Rho Ophiuchi Area, 


            Gary Imm
Powered byPixInsight

Rho Ophiuchi Area

Getting plate-solving status, please wait...
Rho Ophiuchi Area, 


            Gary Imm
Powered byPixInsight

Rho Ophiuchi Area

Imaging telescopes or lenses: Takahashi FSQ-85ED

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Feathertouch Focuser Boss II Electronic Focusing Control

Dates:June 14, 2018June 15, 2018

Astrodon Blue 31mm Gen2 I-Series: 240x30" (2h) (gain: 139.00) -15C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 240x30" (2h) (gain: 139.00) -15C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 240x30" (2h) (gain: 139.00) -15C bin 1x1

Integration: 6h

Avg. Moon age: 1.36 days

Avg. Moon phase: 2.43%

RA center: 16h23m58s.140

DEC center: -24°4842.82

Pixel scale: 1.741 arcsec/pixel

Orientation: 137.140 degrees

Field radius: 2.550 degrees

More info:Open 

Resolution: 8544x6184

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard


This image is a collection of amazing and colorful deep sky objects located in the constellation of Ophiuchus. It is often called the Rho Ophiuchi area. The objects in this 4 panel mosaic include star clusters, reflection nebula, emission nebula, and dark nebula, the closest of which are about 500 light years away

I think this is the prettiest region in the entire sky, and certainly the most colorful. Shades of almost every color of the rainbow are seen in this area of the sky.

The red supergiant star Antares is just off image, above the top center. Its glow permeates the entire top half of the image. To the upper left is the large globular cluster M4. To the right of M4, at top center, is the smaller star cluster NGC 6144. To the upper right is the blue reflection nebula, IC 4605, which surrounds the star 22 Scorpii.

In the left center of the image, the bright blue star Sigma Scorpii is ionizing the SH2-9 red hydrogen emission gas front. In the right center of the image is the beautiful and unusual yellow reflection nebula, IC 4603. The dark nebula B45 extends up and to the right of this reflection nebula.

The namesake Rho Ophiuchi is the bright triple star in the lower right of the image. It is surrounded by a blue reflection nebula, designated as IC 4604. Just to the lower left of IC 4604 is the dark nebula, B42. Just to the lower left of the dark nebula is the lighter blue reflection nebula, IC 6404.

I absolutely love this part of the sky. My favorite aspect of the image are the delicate dark dust lanes which populate the lower right quadrant, silhouetted against the bright stars and contrasting with the yellow and blue reflection nebulae.


Sky plot

Sky plot


Rho Ophiuchi Area, 


            Gary Imm