Type | Galaxy |
---|---|
Magnitude | 8.3 |
Size | 18.6' x 7.2' @ 150° |
Right Ascension | 12h 18' 57.6" (2000) |
Declination | 47° 18' 14" N |
Constellation | Canes Venatici |
Description | B, vL, vmE 0°, sbMBN |
Classification | SAB(s)bc |
Andrew Cooper
Mar 2, 2011 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 6 Moon: 0%
Large!, bright, with a bright core, 10'x4' north-south, NGC4248 is 15' northwest
Andrew Cooper
Jun 7, 2005 Whipple Obs., Green Valley, AZ (map)
46cm f/4.5 Deep Violet
Big!! Bright! extended 4:1 northwest-southeast, bright central region 5'x3' surrounded by a fainter halo, distinct almost stellar core, subtle hint of spiral structure visible at ends of central region, NGC4248 visible 13' west
Andrew Cooper
Jun 13, 1999 Pinal Peak, AZ (map)
20cm f/10 SCT
Large, extended north-south with obvious core
Rev. T.W. Webb
May 19, 1885 Hardwick, Herefordshire, England (map)
Large, oval, bright, best defined at sides; nucleus s, like Androm. neb. on small scale. D'A., 10'x2½'. Spectrum continuous. L.P., spiral.― Celestial Objects for Common Telescopes, T. W. Webb, 1917
William Herschel
Mar 9, 1788 Observatory House, Slough (map)
Very brilliant. Bright Nucleus. With faint milky branches north preceding and south following. 15' long and to the south following running into very faint nebulosity extending a great way. The nucleus is not round.― SEDS website
Pierre Méchain
Jan 6, 1783
In July 1781 I found another nebula close to Ursa Major, near the star No. 3 of Canes Venatici and 1 deg further south."― Messier's correspondence to Bernoulli
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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