NGC 4151 [SEP] constellation
NGC 4151
NGC 4151 is an intermediate spiral seyfert galaxy with weak inner ring structure located from Earth in the constellation Canes Venatici. The galaxy was first mentioned by William Herschel on March 17, 1787; it was one of the two Seyfert galaxies described in the paper which defined the term. It is one of the nearest galaxies to Earth to contain an actively growing supermassive black hole; it was speculated that the nucleus may host a binary black hole, with about 40 million and about 10 million solar masses respectively, orbiting
black hole is listed as fourth largest, and it is unusually large in proportion to the host galaxy, being 14% of the mass, instead of the usual 0.1%
- NGC 1566
- NGC 2778
- NGC 2787
- NGC 3079
- NGC 3115
- NGC 3245
- NGC 3377
- NGC 3384
- NGC 3608
- NGC 3894
- NGC 3998
- NGC 4151
- NGC 4261
- NGC 4291
- NGC 4342
- NGC 4350
- NGC