NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC6253

Basic Information

Location and Magnitude

Right Ascension: 16:59:6.1
Declination: -52:42:57
Constellation: ARA
Visual Magnitude: 10.2

Historic Information

Discoverer: Dunlop
Year of discovery: 1826
Discovery aperture: 9.0

Observational

Summary description: Cl, S, triangular, st 13
Sub-type: I3m

Corwin's Notes

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NGC 6253.  JH described this simply as "A small triangular cl, 2' diam; st =
13 m" in the single sweep that he picked it up.  On the DSS2R image, it seems
to be considerably larger than 2 arcminutes, but its extremities are defined 
by fainter stars.  JH apparently saw only the core -- his description fits 
that quite well.  I've adopted the ESO position for the core as consideration
of the full extent of the cluster pulls the position north by an arcminute or
so.

Steve's Notes

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NGC 6253

14" (4/4/16 - Coonabarabran, 71x, 184x and 230x): fairly small 5' cluster, but quite rich with 60-70 stars mag 12-14.5 resolved at 230x.  Stands out as a bright, partially resolved glow at 71x.  Irregular shape but expands E-W on the south side and tapers on the north side.  Contains no bright stars but a mag 8.9 star is just off the southwest side.  Located 27' NNW of 4th magnitude Epsilon1 Arae.  This well-studied cluster is an old, very metal-rich with an age of ~4 billion years.