Type | Unknown |
---|---|
Magnitude | 15 |
Size | 0.497' x 0.258' @ 100° |
Right Ascension | 11h 23' 40.3" (2000) |
Declination | 9° 47' 44" S |
Constellation | Crater |
Classification | Sa |
Harold Corwin
IC 688 was found by Ormond Stone in January 1888. He measured it micrometrically (12 settings in RA, 2 in Dec), as did Frank Muller about a year later (12 RA settings, 4 Dec settings). They referred their two sets of measurements to the same star, and it is those that I've used to re-reduce the position. (Stone has another set of four measurements using another star, but he did only the RA; I've not reduced these, but they are consistent with the other measurements.) The position so reduced is within a couple of arcseconds of the 2MASS position, so there is no question about the identity of the galaxy.
Unfortunately, Wolfgang picked up a fainter galaxy 44 seconds of time further on east and called it IC 688. I did not catch this until I was loading the IC into NED early in 2005, so all my earlier lists have the wrong galaxy.― IC Notes by Harold Corwin
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