NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC2630
Basic Information
Location and Magnitude
Right Ascension: 8:47:6.0
Declination: +73:0:0
Constellation: UMA
Visual Magnitude:
Historic Information
Discoverer: Tempel
Year of discovery: 1883
Discovery aperture: 11.0
Observational
Summary description: 2 vF, vS, v nr III 982
Sub-type: NF
Corwin's Notes
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NGC 2630 and NGC 2631. These two objects were found by Tempel (apparently in
1883), and described in his note in AN 2660. Of the twelve novae mentioned in
the note, these are the only two not listed in his table. It is remarkable,
too, that he nevertheless describes them as "much brighter" than NGC 2629
and NGC 2641, both seen and measured by the Herschels and by d'Arrest.
At the moment, my feeling is that Tempel confused NGC 2633 with NGC 2629, and
that his pair is actually NGC 2634 and NGC 2634A. These two galaxies are the
only ones in the group that are close enough to be actually called a "pair."
However, while N2634 is bright enough to rival the earlier observers'
discoveries in the area, N2634A is certainly not. It's just conceiveable,
however, that on a night of exceptional transparency, the pair may have stood
out enough to capture Tempel's attention. He was, in fact, so struck by their
brightness -- compared to the nearby nebulae that the Herschel's and d'Arrest
found -- that he suggested variablility for them.
This is a pretty weak argument, however, so until Tempel's discovery sketch
(which he mentions explicitly) can be examined, the question of the identities
of these two NGC numbers has to remain open. So, I've simply entered the NGC
positions in the table for the time being.