NGC 4631
DSS image of NGC 4631
Overlaid DSS image of NGC 4631, 30' x 30' with north at top and west to the right

Aladin viewer for the region around NGC 4631
Whale Galaxy, Herring Galaxy
H V 42, h 1397, GC 3165, MCG +06-28-020, ARP 281, UGC 7865, IRAS 12396+3249, PGC 42637

Type  Galaxy
Magnitude  9.3
Size  15.5' x 2.7' @ 86°
Right Ascension  12h 42' 7.9"  (2000)
Declination  32° 32' 29" N
Constellation  Canes Venatici
Description  vB, vL, eE70, bMN, * att n (NGC4627)
Classification  SBcd
Observing Notes

Andrew Cooper
Jul 18, 2023    Oregon Star Party, Ochoco Mts, OR (map)
25cm f/4.5 Newtonian, Holoholo @ 71x
Seeing: 7 Transparency: 6 Moon: 0%

Large, bright and obvious, about 10' x 2' extended east to west, an odd assymetrical shape, wider on eastern end, gives the moniker Whale Galaxy, no structure noted, no core obvious, a 12th magnitude star on the northern margin near the center of the span, a very faint 1' circular haze further away from the northern margin is NGC 4627 the interacting companion

Andrew Cooper
Mar 2, 2011    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 6 Moon: 0%

A beautiful slash of light across the field, 15'x3', wider on the eastern end, modest core, the entire structure shows mottling, a 12mag star adjacent to the core on the north side, NGC4627 is a 1' fuzzy 3' north of the core

Andrew Cooper
Jun 7, 2005    Whipple Obs., Green Valley, AZ (map)
46cm f/4.5 Deep Violet

Large!! a long spindle with tapered ends, no dust lane, mottled central region, a particularly bright knot just east of center, a 13th magnitude star just north of center, companion NGC4627 just off north edge of halo

Rev. T.W. Webb
May 19, 1885    Hardwick, Herefordshire, England (map)

Very long ray (D'A. 13'). A small star p, and beyond it a small nebula. [NGC4627] Lick photo shows two nebula, probably joined.
― Celestial Objects for Common Telescopes, T. W. Webb, 1917
Other Data Sources for NGC 4631
Associated objects for NGC 4631
Nearby objects for NGC 4631
7 objects found within 120'
IC 819 IC 820 NGC 4583
NGC 4627 NGC 4656
NGC 4676
Credits...

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

A complete list of credits and sources can be found on the about page

NGC 4631