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Contains:  NGC 185, NGC 147
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Two Andromeda satellites in Cassiopeia. (NGC185 & NGC147), 





    
        

            Kees Scherer
Two Andromeda satellites in Cassiopeia. (NGC185 & NGC147)

Two Andromeda satellites in Cassiopeia. (NGC185 & NGC147)

Technical card

Resolution: 5157x2900

Dates:Oct. 9, 2018

Frames:Hutech IDAS 2" LPS-P2: 110x300" (gain: 1.00) -15C bin 1x1

Integration: 9.2 hours

Darks: ~50

Flats: ~25

Bias: ~150

Avg. Moon age: 0.38 days

Avg. Moon phase: 0.16%

Mean SQM: 20.70

Astrometry.net job: 2303094

RA center: 8.935 degrees

DEC center: 48.378 degrees

Pixel scale: 1.113 arcsec/pixel

Orientation: 358.998 degrees

Field radius: 0.914 degrees

Locations: Knight Observatory,Quinta Castelo Novo, Serra de Tomar, Portugal

Data source: Backyard

Description

Both NGC 185 and NGC 147 lie about 7 degrees north of M31 in Cassiopeia.Like M31 and its better-known companions, each of these dwarf galaxies lie about 2 million light years away, about the same distance as M31 itself. The galaxies likely revolve around each other as a binary system, and the pair itself revolves around the much larger M31. Each is about 1/10 the diameter of its parent galaxy. And each is about the same size and shape as Andromeda's more famous companions.

3,4,5,6,7,8 & 9 october 2018.
I used 2 x drizzle in APP, so image scale is 1.11 arcsec/px for this crop.

Comments

Author

keesscherer
Kees Scherer
License: Attribution Creative Commons
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Two Andromeda satellites in Cassiopeia. (NGC185 & NGC147), 





    
        

            Kees Scherer

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