NGC/IC Project Restoration Effort

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NGC3764

 

Basic Information


Location and Magnitude


Right Ascension: 11:36:54.5
Declination: +17:53:21
Constellation: LEO
Visual Magnitude: 14.7

Historic Information


Discoverer: d'Arrest
Year of discovery: 1862
Discovery aperture: 11.0

Observational


Summary description: F, S, R
Sub-type: P

Corwin's Notes

===== NGC 3764. This, as noted in CGCG and MCG, is part of a double system; only the eastern component is bright enough that d'A could have seen it. Somewhat unusually, the two galaxies have quite different types. The western object is a late-type spiral, perhaps an SBd III-IV with pretty low surface brightness. (What, at first sight, appears to be a knot on its northern edge, is probably a background galaxy; the SDSS spectrum confirms this). The brighter eastern galaxy is an S0 (or perhaps an elliptical). There hardly appears to be any interaction between the two, though the redshifts reported by NED are similar (given that they come from different sources, it's possible that they both refer to the brighter eastern object). Another obvious nearby galaxy is on to the east by a few arcminutes; it, too, is well in the background given its SDSS spectrum.

Steve's Notes

===== NGC 3764 17.5" (4/14/01): faint, small, round, 0.7' diameter, very small brighter core with direct vision. This is a close interacting system (unresolved). Forms a pair with NGC 3768 5.5' SE. Both William and John Herschel missed this galaxy although they observed nearby NGC 3768.