NGC/IC Project Restoration Effort

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NGC4184

 

Basic Information


Location and Magnitude


Right Ascension: 12:13:32.5
Declination: -62:42:47
Constellation: CRU
Visual Magnitude:

Historic Information


Discoverer: Herschel J.
Year of discovery: 1837
Discovery aperture: 18.3

Observational


Summary description: Cl, mC, st eS
Sub-type: I2p

Corwin's Notes

===== NGC 4184 is a group of faint stars just where JH says it is. The object was rediscovered over a century later by Ruprecht (it is his number 102), but the NGC number was not attached. Thus, the "non-existent" status in RNGC. It has two concentrations of stars. While JH's position more closely coincides with the eastern, it seems likely that the somewhat richer western one is also a part of the cluster. But there is considerable patchy Galactic obscuration in the area, so only a full investigation of the field will serve to clearly delineate the real cluster here. I've estimated positions for both concentrations. There is a richer cluster of much fainter stars nearby at 12 13 03.6, -62 42 24 (J2000; HCsv, DSS2IR). This is Alessi J12130-6242, discussed by Archinal and Hynes in their 2003 book, "Star Clusters". This is much too faint to have been seen by JH, so is only coincidentally near NGC 4184.

Steve's Notes

===== NGC 4184 14" (4/4/16 - Coonabarabran, 184x and 318x): about two dozen faint stars resolved in a 4' circle. Flanked by a mag 10 star ~4' SW and a mag 10 star ~4' NE. The richest part is a 30" clump on the east side with a half-dozen stars resolved at 318x. Located 16' NNE of mag 6.0 HD 106068.