IC 3657
DSS image of IC 3657
Overlaid DSS image of IC 3657, 60' x 60' with north at top and west to the right

Aladin viewer for the region around IC 3657
SDSS J124119.02+214020.9, Gaia DR3 3955449654511847296

Type  Unknown
Magnitude  16
Size  0.2'
Right Ascension  12h 41' 19.0"  (2000)
Declination  21° 40' 31" N
Constellation  Coma Berenices
Observing Notes

Harold Corwin

Earlier, I wrote about this:
My first look at the print of the original plate suggested that this is nothing more than a defect. However, as Wolfgang and Malcolm have found, there is in fact a faint star just south of Wolf's position. A second look shows that the image of the star was indeed faintly recorded on Wolf's plate. I suspect that the original plate would show it more clearly. See IC 3636 for more about this discovery plate.
Finally, in May 2015, I found that the "star" is in fact a compact galaxy. The SDSS has an emission-line spectrum with a redshift of z = 0.0215.
IC Notes by Harold Corwin
Other Data Sources for IC 3657
Nearby objects for IC 3657
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 3657