NGC3587 - M97
DSS image of NGC3587
Digitized Sky Survey image of NGC3587, 15' x 15' with north at top and west to the right

DSS image of NGC3587
Overlaid DSS image of NGC3587, 15' x 15' with north at top and west to the right
Owl Nebula
GC 2343, h 838, PK148+57.1

Type  Planetary Nebula
Magnitude  9.9
Size  3.4' x 3.3'
RA (2000)  11h 14' 47.8"
Dec (2000)  55° 1' 8" N
Constellation  Ursa Major
Description  !!, PN, vB, vL, R, vvg, vsbM, 150" d

Observing Notes

Andrew Cooper
19 Apr 2012 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x

Bright, round, about 5' across, some structure just beginning to appear with an OIII filter, no central star noted, no color noted

Andrew Cooper
2 Mar 2011 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x

Bright, a round disk 3' across, averted vision reveals some structure in the disk, at least one dark area visible, pale blue, no stars noted within the disk

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.
Other Data Sources for NGC3587
Nearby objects for NGC3587
Acknowledgements and Credits...

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.