NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC7091
Basic Information
Location and Magnitude
Right Ascension: 21:34:7.7
Declination: -36:39:14
Constellation: GRU
Visual Magnitude: 12.6
Historic Information
Discoverer: Herschel J.
Year of discovery: 1834
Discovery aperture: 18.3
Observational
Summary description: eF, pL, vgbM, * 6 f 40s
Sub-type: SBd
Corwin's Notes
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NGC 7091 = IC 5114. JH found this on 1 September 1834, about 6 months after
he began observing from the Cape of Good Hope. He says of it "... place
considerably uncertain having been found when much past the meridian in
searching in vain for Dunlop 561." The RA and NPD are both given only to full
minutes of time in his CGH Observations.
Unfortunately, he precesses this imprecise (and inaccurate) position to 1860
and gives it to 0.1 seconds of time and NPD in GC. The only indication that
it is an approximate position is on the "Number of times observed by H and h"
-- that is given as "1::". Dreyer either ignored or missed that, so the
object came into the NGC with its position given nominal accuracy (1 second of
time and 0.1 arcmin of NPD) and with no note.
The galaxy is a good ways off JH's position (1m 20s preceding, 7.5 arcmin
north), but can be positively identified by JH's note "It precedes a * 6m
nearly in the parallel, about 40 seconds of time."
Swift's position is even further off -- see the IC 5114 entry for that story.
Steve's Notes
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NGC 7091
17.5" (9/7/96): extremely faint, very small, round, 20" diameter. Requires averted vision and finder chart to pinpoint location but once identified could nearly hold continuously. Probably only viewed core as listed dimensions are much larger. Located 7' W of mag 6.9 SAO 213103. Not found on a previous attempt.