NGC/IC Project Restoration Effort

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NGC6240

 

Basic Information


Location and Magnitude


Right Ascension: 16:52:58.8
Declination: +2:24:11
Constellation: OPH
Visual Magnitude: 12.9

Historic Information


Discoverer: Stephan
Year of discovery: 1871
Discovery aperture: 31.0

Observational


Summary description: vF, pL, lE, dif
Sub-type: E?

Corwin's Notes

===== NGC 6240 = IC 4625, which see. There is no problem in the NGC position, but the IC position -- from Barnard -- is a few arcmin off. The identity is clinched nevertheless by Barnard's note of a star near north-following.

Steve's Notes

===== NGC 6240 48" (4/6/13): this disrupted galaxy appeared fairly bright, moderately large, elongated 3:2 SSW-NNE, ~1.2'x0.8', though the shape is irregular. A prominent, thin extension or spike extends 4:1 or 5:1 to the NNE from the central region. This wing is sharply defined and narrow. A short, bright, broader extension juts out to the SSW, in the opposite direction of the NNE wing. Finally, a faint, short wing (~15"x5") extends south from the central region on the east side (on the DSS, this branch curves at the south end). A mag 13.5 star is 30" E, a mag 15.5-16 star is 0.8' SSE and a 12" pair of mag 13.5/15 stars lies 1.5' S. 24" (7/22/14): the Rumpled Starfish appeared fairly faint to moderately bright, moderately large, irregular but roughly elongated 3:2 SSW-NNE, ~60"x40", though increases in size with averted vision. The surface brightness is irregular, with a mottled texture. The brightest portion has an offset nucleus or knot on the east side. On the northeast side, a faint narrow wing extends to the north. A very short extension was also glimpsed on the southeast side. A mag 13.5 star is 0.6' NE and a mag 15.7 star is 50" SSE of center. 24" (8/15/12): this irregular galaxy appeared fairly faint, moderately large, elongated 2:1 SSW-NNE, ~1.0'x0.5', broad concentration with a slightly brighter core. The shape is unusual as the NNE end is narrow, like an edge-on, while the south-southwest end appears wider. With careful viewing, a very faint extension branches south from the central region, creating a forked appearance with the brighter portion trending SSW. A mag 13.5 star is 0.6' NE and a mag 15.5 star is 0.8' SE of center. 18" (7/22/03): fairly faint, fairly small, elongated 2:1 SSW-NNE, 0.8'x0.4', weak concentration, appears slightly brighter along the major axis. With extended viewing, there is an impression of an irregular shape with a very faint extension off the main bar near the center. 17.5" (6/8/91): fairly faint, small, elongated 2:1 SW-NE, even surface brightness. A mag 13 star is at the NE edge 0.6' from center.