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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

===== 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

===== 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.