NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC6638
Basic Information
Location and Magnitude
Right Ascension: 18:30:56.2
Declination: -25:29:45
Constellation: SGR
Visual Magnitude: 9.2
Historic Information
Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7
Observational
Summary description: globular, B, S, R, rr
Sub-type: VI
Steve's Notes
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NGC 6638
18" (7/22/06): at 435x this globular appeared fairly bright, ~3' in diameter with an intense 1' core. The core appears very mottled and just begins to break up into a swarm of faint stars, particularly around the edges. Several very faint stars pepper the halo and pop in and out of visibility. The halo has an irregular scraggly appearance. I was able to pick up this globular with 15x50 IS binoculars as a very small, faint glow along with a mag 9.4 star close south.
17.5" (5/10/91): fairly bright, fairly small, round, 2.5' diameter, gradually increases to a bright core. The halo has a fairly even surface brightness. A few extremely faint mag 15-16 stars are resolved at the mottled edges. Located 3.6' N of mag 9.4 SAO 186904.