NGC5194 - M51
DSS image of NGC5194
Digitized Sky Survey image of NGC5194, 30' x 30' with north at top and west to the right

DSS image of NGC5194
Overlaid DSS image of NGC5194, 30' x 30' with north at top and west to the right
Lord Rosse's Question Mark Galaxy, Whirlpool Galaxy
ARP 85, GC 3572, h 1622, IRAS 13277+4727, MCG+08-25-012, PGC 47404, UGC 8493, VV 403

Type  Galaxy
Magnitude  8.4
Size  11' x 7.8' @ 163°
RA (2000)  13h 29' 52.8"
Dec (2000)  47° 11' 43" N
Constellation  Canes Venatici
Description  !!!, Great spiral nebula

Observing Notes

Andrew Cooper
30 Jun 2010 Keck Observatory, Mauna Kea Summit (map)
76mm f/6 APO, TeleVue-76 @ 14x

Small, bright enough to be quite obvious, a halo easily visible around the core, NGC5195 visible on the northern margin, easily found by sweeping south from Alcor, viewed without and then with supplemental oxygen, no major difference seen in the galaxies despite the altitude of 13,600ft

Andrew Cooper
18 Apr 2010 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x

Stunning! Big, bright, a wonderful spiral surrounding a bright core, two spiral arms wrap around the core, a bridge of material reaches to the companion NGC5195, a 14th magnitude star overlies the spiral in the southwest quadrant, always a showpiece object with a large 'scope and a dark sky!

Andrew Cooper
6 Apr 2007 Hale Pohaku, HI (map)
15cm f/5 Newtonian, Primero @ 97x

Bright, large, beautiful halo around a bright core, spiral arms clearly visible with averted vision, about 10' across, NGC5195 visible at northern margin and connected by a bright bridge of material, a sublime sight even in a modest telescope given nearly perfect conditions at a true dark sky site

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

Both galaxies clearly visible, some structure barely visible, large, bright, obvious cores

Charles Messier
11 Jan 1774

Very faint nebula, without stars, near the eye of the Northern Greyhound, below the star Eta of 2nd magnitude of the tail of Ursa Major: M. Messier discovered this nebula on October 13, 1773, while he was watching the comet visible at that time. One cannot see this nebula without difficulties with an ordinary telescope of 3.5 foot: Near it is a star of 8th magnitude. M. Messier reported its position on the Chart of the Comet observed in 1773 & 1774. Memoirs of the Academy 1774, plate III. It is double, each has a bright center, which are separated 4'35"". The two ""atmospheres"" touch each other, the one is even fainter than the other. Re-observed several times."

Rev. T.W. Webb
Hardwick, Herefordshire, England (map)
24cm Reflector

E. of Rosse's wonderful spiral; its wreaths are beyond all but the first telescopes; common ones will only show two very unequal nebula nearly in contact, both brightening in the centre: traces of the halo encompassing the larger may be caught; Sm. could not do more; 'The enigma is another unequivocal mark of the illimitable power of the Supreme Creator!' 9-1/3 in. speculum showed plainly outer end of spiral and junction with smaller nebula. A misty spot in finder 3° sp, Alkaid, at end of Great Bear's tail.
Other Data Sources for NGC5194
Nearby objects for NGC5194
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.