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Contains:  NGC 4656, NGC 4631, NGC 4627
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The Whale, pup and Hockey Stick, 





    
        

            Steven Bellavia
The Whale, pup and Hockey Stick

The Whale, pup and Hockey Stick

Technical card

Resolution: 3208x2139

Dates:June 1, 2016

Frames: 24x300" ISO1600

Integration: 2.0 hours

Avg. Moon age: 25.39 days

Avg. Moon phase: 18.18%

Bortle Dark-Sky Scale: 4.00

Astrometry.net job: 1938703

RA center: 12h 42' 55"

DEC center: +32° 21' 3"

Pixel scale: 1.892 arcsec/pixel

Orientation: 179.135 degrees

Field radius: 1.013

Data source: Backyard

Description

NGC 4631 (also known as the Whale Galaxy, or Caldwell 32) is an edge-on spiral galaxy in the constellation Canes Venatici. This galaxy's slightly distorted wedge shape gives it the appearance of a whale, hence its nickname. NGC 4631 has a nearby companion dwarf elliptical galaxy, NGC 4627. Sometimes referred to as "the pup" (even though a baby whale is a "calf"). NGC 4627 and NGC 4631 together were listed in the Atlas of Peculiar Galaxies as an example of a "double galaxy" or a galaxy pair. NGC 4631 and NGC 4627 are part of the NGC 4631 Group, a group of galaxies that also includes the interacting galaxies NGC 4656 and NGC 4657 (The "Hockey Stick" or "Crowbar"). The actual members of the group is currently undetermined, and is estimated to have 5 to 27 galaxies, all approximately 30 million light-years away.

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Author

bellavia
Steven Bellavia
License: None (All rights reserved)
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The Whale, pup and Hockey Stick, 





    
        

            Steven Bellavia