Type | Galaxy |
---|---|
Magnitude | 13.5 |
Size | 0.637' x 0.42' @ 105° |
Right Ascension | 21h 39' 44.6" (2000) |
Declination | 6° 17' 11" N |
Constellation | Pegasus |
Description | F, pL, R |
Classification | SBb |
Harold Corwin
IC 5127 is probably identical to NGC 7102. Bigourdan's position is just five seconds of time too large, and his description is appropriate. However, he dates his three measurements to the same night on which he made three measurements of NGC 7102 (these reduce to the correct position).
Since I've not yet found Bigourdan's error -- if there is one -- I'm not prepared to say for sure that the two objects are identical. However, it seems likely. See IC 2120 for a case where we are sure that Bigourdan saw the "same" object on the same night, yet apparently thought that it was a nebula once and a comet the next!
One curious thing while I'm here: Bigourdan's comparison star for NGC 7102 (BD+5 4840) is almost exactly at its BD position, while that for IC 5127 (BD+5 4837) is nearly 4 arcmin away, as large an error as I've seen in the BD. Was this really the star that Bigourdan used? I don't see anything on the POSS1 prints that might be the star/galaxy pair matching Bigourdan's measurements (the galaxy being -3.83 seconds and -5 arcmin 44.0 arcsec from the star).
So, a mystery -- but the objects are probably identical. But I'd certainly like to know what went on that evening in the western dome of the Observatoire de Paris.― IC Notes by Harold Corwin
3 Pegasi | 4 Pegasi | 7 Pegasi |
HD 205801 | SAO 126937 | SAO 126939 |
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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