NGC/IC Project Restoration Effort

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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

===== 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.