IC 3557
Overlaid DSS image of IC 3557, 60' x 60' with north at top and west to the right
Aladin viewer for the region around IC 3557
MCG+03-32-077, NPM1G +16.0310, PGC 42015, SDSS J123608.13+163829.2, Gaia DR3 3935322681847527168
| Type | Galaxy Cluster |
|---|---|
| Magnitude | 15 |
| Size | 0.473' x 0.369' @ 105° |
| Right Ascension | 12h 36' 8.2" (2000) |
| Declination | 16° 38' 29" N |
| Constellation | Coma Berenices |
| Classification | E |
Observing Notes
Harold Corwin
IC 3557 is a double (at least) galaxy in a compact group, which is, in turn, in a cluster. There are at least 4 companions nearby -- and on DSS (DSSR1), a defect as well. The defect, fortunately, is in an empty bit of sky just northeast of the IC object. I've included positions for the companions as at least two of these -- directly north of the brighter pair -- may be included in the image on Frost's plate from the 24-inch Bruce refractor.
Other Data Sources for IC 3557
Nearby objects for IC 3557
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 3557