NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC5925
Basic Information
Location and Magnitude
Right Ascension: 15:27:26.0
Declination: -54:31:42
Constellation: NOR
Visual Magnitude: 8.4
Historic Information
Discoverer: Dunlop
Year of discovery: 1826
Discovery aperture: 9.0
Observational
Summary description: Cl, vL, vRi, lC, st 11…14
Sub-type: III1m
Corwin's Notes
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NGC 5925. JH saw this in three sweeps and used the word "remarkable" to
describe it in two of those; in the third, he wrote "A most numerous and
beautiful milky way group or cluster ..." In all three sweeps, he had it more
than filling his 15-arcminute field. His three positions are, as you might
expect for such a large object, not very accordant (here precessed to J2000):
Sweep 468 on 8 July 1834 15 27 42 -54 31.9
Sweep 469 on 9 July 1834 15 27 29 -54 32.4
Sweep 599 on 19 June 1835 15 28 07 -54 30.0
GC and NGC 15 27 46 -54 31.4
He adopted a mean value for the GC and Dreyer of course used that for the NGC.
When I look at the DSS, I see a rough hour-glass figure, approximately 22
arcmin by 16 arcmin with the long axis in position angle 60 degrees. I put
the center right at JH's position on 9 July 1834. While there are enough
other similarly bright stars scattered around the field to account for JH's
other two observations, the accordance with what I see on the sky with his
second observation has led me to essentially adopt that position for the
cluster.
Steve's Notes
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NGC 5925
22" (6/28/06 - Hawaii): at 110x appears as a large, fairly rich cluster of ~150 stars mag 11 to 14 in a 25'x12' group (roughly rectangular) elongated SSW to NNE. Not concentrated and without any distinctive rich clumps, though many stars forming small subgroups. Situated in a rich region of the Milky Way and not distinguishable at moderate power but fairly detached using low power.