| Type | Planetary Nebula |
|---|---|
| Magnitude | 11.2 |
| Size | 3.2' x 3.37' |
| RA (2000) | 11h 14' 47.8" |
| Dec (2000) | 55° 1' 8" N |
| Constellation | Ursa Major |
| Description | !! vB, vL, R, vvg, vsbM |
Andrew Cooper
12 Jun 1999 Pinal Peak, AZ (map)
20cm f/10 SCT
A faint patch with no discernable detail
John Herschel
10 Feb 1831
A large uniform nebulous disc, diameter 19.0s of time in AR [RA]. Quite round, very bright; not sharply defined, but yet very suddenly fading away to darkness. A most extraordinary object.
Charles Messier
24 Mar 1781
Nebula in the Great Bear, near Beta: It is difficult to see, reports M. Méchain, especially when one illuminates the micrometer wires: its light is faint, without a star. M. Méchain saw it the first time on Feb 16, 1781, & the position is that given by him. Near this nebula he has seen another one, which has not yet been determined [M108], and also a third which is near Gamma of the Great Bear [M109]"
Rev. T.W. Webb
Hardwick, Herefordshire, England (map)
Large pale plan. neb.; very remarkable object. h., 2'40"", which at distance of 61 Cygni only, would equal 7 times orbit of Neptune. He saw light nearly equable, though with softened edge, and faintly bicentral. E. of Rosse, on the contrary, two large perforations (whence it has been called the 'Owl Neb.'), and an indistinct spiral structure. Before 1850 there was a star in each opening; since, one only. Huggins, gas spectrum; 2° sf β. L.P. shows an outer ring. Barnard three faint stars, the central one variable. Mt. Wilson 5 stars. 100 small neb in field.
Drawings, descriptions and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission. Use for non-profit and educational reasons is generally given on request.
Positional and some physical information is from the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Additional object data from the SIMBAD database, operated at CDS, Strasbourg, France.
The Digitized Sky Survey was produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope.
Dark nebulae data from E.E. Barnard, A Photographic Atlas of Selected Regions of the Milky Way. Ed. Edwin B. Frost and Mary R. Calvert. Carnegie Institution of Washington, 1927
Object descriptions of Rev. Webb from Celestial Objects for Common Telescopes sixth edition, Rev. T.W. Webb, 1917, edited by Rev T.E.Espin.