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RA: 11h 11m 31.29s
Dec: +55° 40′ 31″
Con: Ursa Major
Ch: MSA:576, U2:46, SA:2
Type: galaxy, Sc
Mag: B=10.7, V=?
Size: 8.128′ x 2.754′
Synonyms: H V-046
Recorded on APril 17, 1789 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vB, mE, resolvable, 10' long, 2' broad. There is an unconnected pretty bright star in the middle."
A supernova erupted in this galaxy in 1969 (13.5p)
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag galaxy. Their coded description reads EL,HISB,KNPCHYDSKSTR.
Doig, P. (1925) Notes on the nebulae and clusters in Webb's 'Celestial Objects for Common Telescopes' (Sixth edition, Vol.ii). Part V. M.N.R.A.S., 36(3), 89.
This galaxy appears on page 35 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Houston writes: "Although Messier did not include this object in his original 18th century catalogue, handwritten notes in his personal copy of the work make it clear he was aware of it ... it is a narrow streak about 7' long with a small central condensation."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10M; 8' x 2' extent; very large and bright, E-W-oriented gash; somewhat mottled appearance; 12.5M star superimposed off-center; see photo at HAG-35; 50' NW of M-97; !good supernova prospect!."
Observing site: Little Tycho Observatory
[11h 11m 30s, 55° 40m 0s] AKA M 108. An almost starlike nucleus, surrounded by a faint, elliptical haze in pa 80°. The "nucleus" is actually a foreground star, as shown in a U of Arizona 4 meter image.
The Messier objects
The Bennett objects
The Caldwell list
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