NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC1501

 

Basic Information


Location and Magnitude


Right Ascension: 4:6:59.4
Declination: +60:55:17
Constellation: CAM
Visual Magnitude: 11.5

Historic Information


Discoverer: Herschel W.
Year of discovery: 1787
Discovery aperture: 18.7

Observational


Summary description: planetary, pB, pS, vlE, 1' diam
Sub-type: PN

Steve's Notes

===== NGC 1501 18" (11/7/07): superb view at 450x in good seeing. The 1' diameter disc is slightly elongated ~E-W, ~60"x50" with a very narrow, brighter rim and darker center. The mag 14.4 central star was steadily visible. On closer inspection the thin rim was clearly irregular in surface brightness and slightly brighter along the southwest and northeast sides with a couple of tiny knots embedded in the rim. The slightly darker interior was weakly mottled or patchy with subtle variations in surface brightness. 17.5" (1/8/00): at 100x, this moderately bright PN was irregularly round, 1' diameter, weakly annular with a faint glimpse of the central star. There was a good contrast gain with the OIII filter and the image was crisp-edged, slightly elongated SW-NE and the small, darker center was more evident. Excellent view at 220x with the faint central star (mag 14.4) clearly visible. The surface brightness was irregular with an unevenly brighter outer rim. The central star was visible steadily at 280x and the overall surface brightness was mottled or "clumpy" (brighter on west and NE rim), darkening in the center. 17.5" (9/14/85): bright, moderately large, almost round, 1' diameter, high surface brightness. An easy mag 14.2 central star is visible. Appears darker near the central star with a brighter rim. 13" (1/28/84): slightly annular, very faint mag 14 central star visible. 8": fairly faint, moderately large, bluish, slightly elongated, sharp-edged.