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NGC3632

 

Basic Information


Location and Magnitude


Right Ascension: 11:20:3.6
Declination: +18:21:24
Constellation: LEO
Visual Magnitude: 11.0

Historic Information


Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7

Observational


Summary description: pB, * inv
Sub-type: S0-a

Corwin's Notes

===== NGC 3632 = NGC 3626. This is an identity first suggested by Dreyer, and was adopted by him in his notes to his 1912 edition of WH's Scientific Papers. It is most likely correct since WH found II 30 (which later became N3632) during one of his earlier sweeps (on 15 February 1784) when he was still perfecting his techniques. I did notice, however, that NGC 3599 is just 5 minutes of time preceding the position WH gave for N3632. The problem with that galaxy, though, is that it does not match WH's description -- "A pB nebula, it seems to contain stars; it is of some extent" -- very well. Also, if WH had seen N3599, I would have expected him to also record the much brighter NGC 3607 and 3608 just a minute and a half following at essentially the same declination. He did not record these until a month later. All considered, then (well, all that I can think of given the field), Dreyer's solution is the best one, so is the one that I fully endorse.

Steve's Notes

===== NGC 3632 See observing notes for NGC 3626.