NGC 3628

Spiral Galaxy NGC 3628 (= H V.8 = Arp 317), type Sc, in Leo

[NGC 3628, AAT]
Right Ascension 11 : 20.3 (h:m)
Declination +13 : 36 (deg:m)
Distance 35000.0 (kly)
Visual Brightness 9.5 (mag)
Apparent Dimension 14.0 x 3.6 (arc min)

Discovered by William Herschel in 1784.

NGC 3628 forms a conspicuous group with M65 and M66, the Leo Triplet or M66 group (named after the brightest of the three).

NGC 3628 is the faintest and most difficult in the group, just faint enough to have escaped Messier's small telescopes (although it may be that his later instruments might have shown it, if he had ever looked at this place under very good conditions). Thus its discovery was left to William Herschel who cataloged it as H V.8 following its discovery on April 8, 1784.

NGC 3628 is seen edge-on. A conspicuous band of dark dust clouds form a broad equatorial band, which obscures the galaxy's bright central region, and hides most of the bright young stars in its spiral arms. The dust band, or belt, is obviously distorted and deformed in the outer regions of the galaxy. The reason for this deformation is evidently the gravitational interaction with its two bright neighbors, M65 and M66.

Our image was obtained by David Malin with the Anglo-Australian Telescope. This image is copyrighted and may be used for private purpose only. For any other kind of use, including internet mirroring and storing on CD-ROM, please contact the Photo Permissions Department (photo at of the Australian Astronomical Observatory.

  • More information on this image by David Malin

    In the SAC 110 best NGC object list. In the RASC's Finest N.G.C. Objects Objects list.

  • Edge-on spiral galaxy NGC 3628 was featured in Jeff Bondono's Masterpieces Messier Missed for April, 1996

  • NED data of NGC 3628
  • SIMBAD Data of NGC 3628
  • Publications on NGC 3628 (NASA ADS)
  • Observing Reports for NGC 3628 (IAAC Netastrocatalog)
  • NGC Online data for NGC 3628

    Hartmut Frommert
    Christine Kronberg

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    Last Modification: June 5, 2005