Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 108  ·  M 97  ·  NGC 3556  ·  NGC 3587  ·  Owl nebula  ·  PK148+57.1
M97 and M108 Wide Field (Cropped), 



    
        

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M97 and M108 Wide Field (Cropped)

M97 and M108 Wide Field (Cropped), 



    
        

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M97 and M108 Wide Field (Cropped)

Technical card

Imaging telescopes or lenses: Skywatcher Esprit 80 ED APO Triplet

Imaging cameras: ZWO ASI 071 MC Pro

Software: SharpCap  ·  Nebulosity  ·  PixInsight

Filters: ZWO IR/UV Cut Filter


Frames: 120x60" (2h)

Integration: 2h


Astrometry.net job: 2060554

RA center: 11h 13' 15"

DEC center: +55° 21' 31"

Pixel scale: 2.398 arcsec/pixel

Orientation: 143.692 degrees

Field radius: 0.698 degrees


Resolution: 1194x1722

Data source: Unknown

Description

A crop of my wide field image.

Gain: lowest read noise. Sensor temperature ~-20 C.

Messier 97 (the Owl Nebula) is a planetary nebula about 2000 ly away. It's almost a light-year in diameter.

Messier 108 is a galaxy about 46 Mly away. It has a diameter of about 110 kly.

I could not get more than 2 hours before going to bed, and subsequent nights have had poor seeing. A pity because targets like these really need more time. To try to disguise noise I've made the background very dark. Too dark I think. Makes it look a bit artificial. Must try again.

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M97 and M108 Wide Field (Cropped), 



    
        

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