IC 257
DSS image of IC 257
Overlaid DSS image of IC 257, 30' x 30' with north at top and west to the right

Aladin viewer for the region around IC 257
MCG+08-06-011, UGC 2298, PGC 10729

Type  Non-Existent
Magnitude  14.5
Size  2.2' x 1.6' @ 90°
Right Ascension  2h 49' 45.6"  (2000)
Declination  46° 58' 35" N
Constellation  Perseus
Description  eF, pS, R, v diffic, 2nd of 3
Classification  E/S0
Observing Notes

Object Note
Sep 9, 2020    

There is considerable disagreement in the identification of this object and IC 256 thus the relevant conflicting notes are included here

Courtney Seligman

Per Dreyer, IC 257 (Swift list VIII (#3), 1860 RA 02 40 30, NPD 43 36.1) is "extremely faint, pretty small, round, very difficult, 2nd of 3", the others being IC 256 and 260. As noted in the entry for IC 256 (which see for the gory details), IC 257 is probably a nonexistent object (with the precessed position listed above), but is usually (almost certainly erroneously) listed as PGC 10729 (which is probably actually IC 256). Given that, readers who prefer to accept the identification as PGC 10729 should refer to the PGC entry, immediately following.
Courtney Seligman, Celestial Atlas

Harold Corwin

This was seen by WH in 1786, but never published. Also see IC 256 where this figures in that galaxy's identification.
IC Notes by Harold Corwin
Other Data Sources for IC 257
Associated objects for IC 257
Nearby objects for IC 257
3 objects found within 120'
IC 256 IC 260 NGC 1146
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

IC 257