NGC/IC Project Restoration Effort

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NGC5998

 

Basic Information


Location and Magnitude


Right Ascension: 15:49:38.1
Declination: -28:34:39
Constellation: SCO
Visual Magnitude:

Historic Information


Discoverer: Herschel W.
Year of discovery: 1786
Discovery aperture: 18.7

Observational


Summary description: Cl, pL, pRi, st vS
Sub-type: *Grp

Corwin's Notes

===== NGC 5998 is probably not a cluster, but it is close to WH's position, and matches his description. It is so clearly seen on the IIIa-J film that I'm a bit surprised that both RNGC and ESO list it as not found. Still, the relevant information is not in NGC; WH's published description reads, in full, "A cluster of very small stars, pretty rich, 6 arcmin long, 4 arcmin broad; in the form of a parallelogram." The parallelogram, which I make just a bit larger than WH's estimate, encloses about two dozen stars, half of which are in GSC. The center of the figure is about 2 arcmin northeast of WH's place, but that is well within his usual error for clusters.

Steve's Notes

===== NGC 5998 17.5" (6/30/00): this asterism appears as a faint, elongated group of 9 stars. Most of these stars are arranged in an arc concave to the NE. Appears fully resolved and too poor to be a true cluster.