Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  IC 4592  ·  IC 4604  ·  IC 4605  ·  M 4  ·  NGC 6121  ·  Part of the constellation Libra (Lib)  ·  Part of the constellation Scorpius (Sco)  ·  The star Al Niyat (σSco)  ·  The star Antares (αSco)  ·  The star Dschubba (δSco)  ·  The star Graffias (β1Sco)  ·  The star γLib  ·  The star νSco  ·  The star πSco  ·  The star ρSco  ·  The star τSco  ·  The star ω1Sco  ·  rho Oph Nebula
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Rho Ophiuchi RGB (OSC) - Very Wide Field, 



    
        

            andrea tasselli
Rho Ophiuchi RGB (OSC) - Very Wide Field
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Rho Ophiuchi RGB (OSC) - Very Wide Field

Getting plate-solving status, please wait...
Rho Ophiuchi RGB (OSC) - Very Wide Field, 



    
        

            andrea tasselli
Rho Ophiuchi RGB (OSC) - Very Wide Field
Powered byPixInsight

Rho Ophiuchi RGB (OSC) - Very Wide Field

Equipment

Acquisition details

Dates:
July 12, 2007
Frames:
1×2000(33′ 20″)
Integration:
33′ 20″
Avg. Moon age:
27.38 days
Avg. Moon phase:
5.15%

Basic astrometry details

Astrometry.net job: 4287539

RA center: 16h07m34s.1

DEC center: -19°4500

Pixel scale: 31.241 arcsec/pixel

Orientation: 315.115 degrees

Field radius: 15.019 degrees

Resolution: 2829x1994

File size: 4.7 MB

Locations: Sardinia Holiday Place, Sant'Antioco, Sardinia, Italy

Data source: Traveller

Description

This started as a (mostly) shot in the dark. I think I was aiming, more or less, at the Rho Ophiuchi region with the D50 running piggyback on the Mk67. Now aiming in these conditions was mostly by eyeballing the most significant start/cluster that you could see in the camera's viewfinder, which was never that bright. Problem number 1 was that very bright star right there where there shouldn't be any. I wish I could have told it to move elsewhere, that this was my only hope for a decent shot at that area for untold years but it wouldn't budge. So that you know, that star is Jupiter shining brightly at magnitude -2.7.

Second problem I had and even nastier than the first one was that one of the security light of the camping we were staying in was shining right into the lens. I kept moving the camera away more and more from the original aiming point (which would have had Rho Ophiuchi right in the middle of the frame) and further and further to the left until no more could be done without losing the object altogether. I thought I made it but ultimately some stray light seeped through and I had a hell of a time to remove it with the help of some cropping to the right. Bottom line: this a pretty weird shot. One day I'll get a better one though.

Final note: I have no idea what is that bright area to the left of Jupiter. Doesn't look like a stray reflection though...

Shot at f/3.5

Comments

Sky plot

Sky plot

Histogram

Rho Ophiuchi RGB (OSC) - Very Wide Field, 



    
        

            andrea tasselli