Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  M 91  ·  NGC 4548
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M91, 



    
        

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M91
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M91

Getting plate-solving status, please wait...
M91, 



    
        

            sydney
M91
Powered byPixInsight

M91

Technical card

Imaging telescopes or lenses: Celestron c14 EdgeHD Celestron C14

Imaging cameras: SBIG ST-10XME

Mounts: Astro-Physics 900 GTO

Focal reducers: Celestron Reducer 0.7x

Filters: Luminance  ·  Astrodon I-series


Dates:April 12, 2020May 14, 2020

Frames:
Astrodon I-series: 60x480" (8h) bin 2x2
Luminance: 46x600" (7h 40') bin 1x1

Integration: 15h 40'

Avg. Moon age: 20.88 days

Avg. Moon phase: 62.94%


Basic astrometry details

Astrometry.net job: 3615882

RA center: 12h 35' 25"

DEC center: +14° 29' 52"

Pixel scale: 0.511 arcsec/pixel

Orientation: 127.734 degrees

Field radius: 0.186 degrees


Resolution: 2178x1464

Data source: Backyard

Description

M91 (NGC 4548) is a barred spiral galaxy in the constellation Coma Berenices. It is one of the faintest Messier objects at approximately magnitude 11. M91 is about 63 million light-years away and has an apparent size of 5.4 x 4.3 arc minutes. The observation of Cepheid variable stars by the Hubble Space Telescope confirmed that M91 is a member of the Virgo Cluster [https://iopscience.iop.org/article/10.1086/307151/fulltext/39340.text.html]. M91 is classified as “anemic” for its relative lack of star forming regions and gas, possibly resulting from ram pressure stripping as it passes through the dense galaxy cluster [http://adsabs.harvard.edu/full/1999A%26A...349..411V].

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M91, 



    
        

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