NGC 4497
DSS image of NGC 4497
Overlaid DSS image of NGC 4497, 30' x 30' with north at top and west to the right

Aladin viewer for the region around NGC 4497
H III 42, GC 3046, IC 3452, MCG+02-32-113, UGC 7665, PGC 41457, SDSS J123132.52+113728.9, Gaia DR3 3907586298445407744

Type  Galaxy
Magnitude  12.47
Size  1.193' x 0.573' @ 60°
Right Ascension  12h 31' 32.6"  (2000)
Declination  11° 37' 29" N
Constellation  Virgo
Description  vF (d'A pF)
Classification  SB_{xa}
Observing Notes

Harold Corwin

IC 3452 = NGC 4497. There is no doubt about this identity. As with several other of Schwassmann's objects, the only doubt is why both he and Dreyer missed the identity with the NGC object. Both the IC and NGC positions are near the modern position for the galaxy.

Furthermore, Schwassmann has two accordant measurements and descriptions for the galaxy. The only difference with the image on the DSS is the position angle: Schwassmann gives 100 degrees, while the outer isophotes of the galaxy are closer to 70 degrees. However, the bright inner part is closer to Schwassmann's PA, suggesting that his plates showed only this piece of the galaxy. It's also possible that he got the quadrant wrong, and that he meant to write 80 degrees instead of 100.
IC Notes by Harold Corwin
Other Data Sources for NGC 4497
Nearby objects for NGC 4497

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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NGC 4497