NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4099
Basic Information
Location and Magnitude
Right Ascension: 12:6:3.6
Declination: +20:36:28
Constellation: COM
Visual Magnitude: 13.1
Historic Information
Discoverer: Herschel W.
Year of discovery: 1786
Discovery aperture: 18.7
Observational
Summary description: eF, eS
Sub-type: S?
Corwin's Notes
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NGC 4099 = NGC 4098. WH found three nebulae in this group. It's reasonable
to suppose that he saw the three brightest (two of these were seen by JH, and
the others were found by d'A); these are NGC 4092, 4095, and 4098. As Dreyer
realized in 1912, this would make the number 4099 = GC 2714 irrelevant as it
was added (by JH) explicitly for H III 384, the third of his father's three.
On the DSS image, this looks like an interacting double galaxy (it may be a
triple -- there is a broad plume extending on to the southeast that may be a
third component). The two are well merged, so the early observers would not
have seen them as separate objects. So that won't save the extra NGC number
(nor IC 2998, which see).
Steve's Notes
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NGC 4099
See observing notes for NGC 4098.