742 740
Psc
☀11.1mag
Ø 3.0' / 2.9'
Drawing Uwe Glahn

NGC 741, also known as PGC 7252, is a formerly active radio galaxy in the constellation of Pisces. Located 74.13 Mpc away, NGC 741 is part of a group of galaxies including NGC 742 and PGC 7250. NGC 741 and NGC 742 recently collided, although the disruption was minor. Radio filaments have been found connecting NGC 741 to NGC 742, and due to the bent structure of the radio filaments, NGC 741 is estimated to be moving at 1400 km/s with respect to its local group, suggesting that ram-pressure stripping was created as a product of the former merger.

200/250mm - 8" (1/1/84): faint, round, diffuse edges, small faint core. A mag 12 star is close NW.

400/500mm - 17.5" (11/6/93): moderately bright, round, prominent core, faint stellar nucleus at moments, larger halo with averted. A mag 11 star is 2.4' NW. In a common halo with NGC 742 attached at the east end at 0.8' separation in pa 100°. Brightest in a group and forms a close triple with MCG +01-06-006 1.5' NNW. CGCG 413-006 (generally misidentified as IC 1751) appeared very faint, very small, slightly elongated N-S. A mag 10.5 star lies 1.3' WNW.

600/800mm - 24" (12/21/16): at 375x; bright, moderately large, round, sharply concentrated with a small very bright core that increases to the center. The halo increases with averted to over 1'. A mag 11 star is 2.4' NW. NGC 741 is the brightest in a group (WBL 061) with NGC 742 0.8' E of center, at the edge of the halo. NGC 741 has a extended X-ray halo reaching a distance of 19' from its center. Furthermore, twin radio jets emerge from the nucleus of NGC 742 and spread into a larger lobe that encircles NGC 741. A total of 8 members of the group were logged within 15' of NGC 741.

CGCG 413-006 (often misidentified as IC 1751) is 1.5' NW. It appeared faint or fairly faint, very small, slightly elongated N-S, 0.3'x0.2', sharp stellar nucleus. The mag 11 star lies 1.4' W.

CGCG 413-002, 3.3' SW of NGC 741, appeared faint to fairly faint, very small, round, 12" diameter.

CGCG 413-001, 9.5' NW of NGC 741, is very faint, very small, elongated ~2:1 ~E-W, 18"x9". Not noticed initially but once picked up could just hold continuously with careful averted vision.

CGCG 413-010, 11' NNE of NGC 741, is faint, very small, irregularly round, ~15"x12".

UGC 1425, 12' NE of NGC 741, is fairly faint to moderately bright, small, roundish, 18" diameter, high surface brightness (core only), occasional sharp stellar nucleus. Increases a bit in size with averted.

UGC 1435, 15' E of NGC 741, is faint, fairly small, oval 3:2 SW-NE, 30"x20", very low surface brightness patch, no core or zones. Collinear with two 14th magnitude stars 2' and 3' E.