NGC3556 - M108
DSS image of NGC3556
Digitized Sky Survey image of NGC3556, 30' x 30' with north at top and west to the right

DSS image of NGC3556
Overlaid DSS image of NGC3556, 30' x 30' with north at top and west to the right
GC 2318, h 831, H V-46, IRAS 11085+5556, MCG+09-18-098, PGC 34030, UGC 6225

Type  Galaxy
Magnitude  10.1
Size  8.7' x 2.2' @ 82°
RA (2000)  11h 11' 31.0"
Dec (2000)  55° 40' 27" N
Constellation  Ursa Major
Description  cB, vL, vmE 79°, pbM, r

Observing Notes

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

Large, bright, elongated 7'x3' east-west, a star just beside the center, not much structure to note

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

Large, bright, a 7'x2' east-west bar, a 13th magnitude star near the core

Andrew Cooper
29 Apr 2006 TIMPA, Avra Valley, AZ (map)
46cm f/4.5 Deep Violet

Large! dim, no obvious core, large halo elongated 6:1 E-W, a 10th mag. star just east of center, some mottling visible, much like a dimmer version of M82

Andrew Cooper
12 Jun 1999 Pinal Peak, AZ (map)
20cm f/10 SCT

Elongated east-west with a nearly stellar concentration near the center

William Herschel
17 Apr 1789

Very bright. Much extended. Resolvable [mottled]. 10' long, 2' broad. There is an unconnected pretty bright star in the middle.

Rev. T.W. Webb
Hardwick, Herefordshire, England (map)

Large, faint, well defined, elongated, rather curved: small star in centre. 1° sf β. L.P., probably spiral.
Other Data Sources for NGC3556
Nearby objects for NGC3556
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.