NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC6439
Basic Information
Location and Magnitude
Right Ascension: 17:48:19.8
Declination: -16:28:44
Constellation: SGR
Visual Magnitude: 12.6
Historic Information
Discoverer: Pickering
Year of discovery: 1882
Discovery aperture: 15.0
Observational
Summary description: planetary, stellar = 13 m
Sub-type: PN
Corwin's Notes
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NGC 6439. I've used the finding chart in Steve Hynes's book "Planetary
Nebulae" to identify this planetary. Some lists have mistakenly pointed at
the star about an arcminute to the north-northeast.
Steve's Notes
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NGC 6439
18" (7/25/06): easily picked up at 115x as a quasi-stellar light-blue mag 12.5 "star" just 1' S of a mag 10.4 star. Very good response to the OIII filter. A very small disc was visible at 225x, perhaps 3" in size. Adding a UHC filter this compact planetary was similar in brightness to the mag 10.4 star and appeared to increase slightly in diameter. At 435x a small oval, ~4"x3" was resolved of uniform surface brightness except it seemed to fade around the periphery, hinting at a thin faint envelope. Located in the NW corner of Sgr near the border of Ophiuchus and Serpens Cauda.
13.1" (7/12/86): fairly bright stellar planetary at 79x, verified with OIII blinking. At 166x a mag 10.5 star just 1.2' N is perfectly placed for blinking comparison! Appears stellar at 214x. Estimate V = 12.0-12.5.