Arp 316

ARP 316 2015 Feb 18

Object:   ARP 316   (NGC 3187, 3190 & 3193) Date:               2015 February 18
Peculiarity:    Galaxy group.
Constellation:           Leo Time & altitude:  21.45 UT     48º
Catalogue data: Seeing (5 high):                               4/5
            R.A:                10h 18m Transparency (5 high):                   4/5
            Dec:                +21º 53 Telescope:     0.5m f4.1  Dob.
            Magnitudes:  see notes. Eyepiece:      8mm Ethos     x260
            Galaxy size (mins): (3193) 3 x 2.7 Filters:            No improvement with Lumicon Deep Sky.

Notes:

Part of the Hickson 44 group.

3193: (11.8m) round and bright across most of its diameter.

3190: (12.1m) elongated 4:1 NW-SE. The SW edge is sharply defined with the brightness falling off abruptly; it reminds me of NGC 7331. This effect is caused by a dust lane.

3187: (13.9m) very faint but seen and held with DV. Seen only as an oval haze. The “integral sign” shape which appears in deep images was not seen. The major axes of 3187 and 3190 are in alignment.