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Type: galaxies (interacting), Sb
Mag: B=11.3, V=?
Size: 7.413′ x 4.897′
Synonyms: H I-112
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vB, L, R, mbM, not easily resolved, 4' diameter."
An observer using the 72-inch f/8.8 speculum telescope at Birr Castle noted "Branches suspected several times, but not distinctly seen. Has a companion nebula 5' or 6' south [NGC 770]."
Burnham notes that this 12th mag spiral galaxy in Aries is bright, considerably large, elongated and gradually brighter in the middle. It is asymmetric in form, and has a strong spiral arm on the northwest side.
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads S,DIF,SBM,DKLNS N ARM WD,S ARM NOT VIS.
Photo Index by Jim Lucyk: Sky&Tel. 9/83 p206, The Astrograph 10-11/81 p25, Astronomy mag. 10/87 p110.
Listed as No. 78 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "Companion is NGC 770. Faint material toward each of two dwarf companions."
Hartung notes "all I see with 30cm is a fairly bright round haze nearly 2' across, rising much to the centre but with no real nucleus. It is a small faint hazy spot with 10.5cm."
Houston notes that this 10th mag galaxy was classified by William Herschel as a 'bright nebula.' He writes: "A 4-inch will show it nicely . . a little east of Gamma Arietis. This spiral is about 5' by 3' in size." He estimated the magnitude as 10.0, 10.3, 10.4 & 10.6.
Listed by the Herschel Club, described as "slight elongation noted, fuzzy, bright nucleus. Used averted vision to clearly observe this elusive object. A slight bulge at centre was also noted. 8-inch, 48x."
Sanford notes that this spiral galaxy "is the best of .. a few galaxies in Aries ... which has several arms suspected in a 12-inch telescope. It has three fairly bright H II regions, one near the nucleus and two near the end of one of the widely spaced spiral arms. There is also a star of about 13th magnitude near the western side of the nuclear area, which should not be mistaken for a supernova."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 5'x 3' extent; 80' ESE of 4M Gamma ARI; large but faint with 14M stellar nucleus; bright arc (spiral arm) to NW."
Steve Coe, using a 13" f/5.6, notes: "Bright, Large, little elongated in PA 135 degrees. The arms of this face-on spiral are very mottled. The core is much brighter than the arms at 165X and the very center has a stellar nucleus in moments of good seeing."
AJ Crayon, using an 8" f/6 Newtonian, notes: "is another spiral galaxy, 10m 6'X3' in position angle east, brighter in the middle and at 100x NGC 770 is 5' to the southwest. Due to its magnitude size ration this observation required averted vision, moments of good seeing and a dark hood.
POSS: elong SE-NW in both core & halo. asym-br arm extends WNW from core.
T&B: three *s.
15cm - sim to 25cm obs #2 but a bit smlr.
- consp mod br glow @ 50x. 140x: rel lg mod f halo w/broad concen. sm core
concen, then sub*ar nuc that has *ar center. halo 2'x1'.75, elong ~E-W.
I get impression of short cen bar elong ~N-S. m13.5 * 2' WSW, farther S
is gx N 770. BS, 7Nov1988, Anderson Mesa.
25cm - 5'x2', granular. core is gran and sharp; BS says sm, intense core.
- *ar nuc seen on reobs. core elong 45" E-W.
30cm - fairly lg, mod well concen @ lox. approx round, 2' diam @ hix. fairly
well concen w/*ar nuc. lox gives 3'.5x1'.5.
Location: Campsite (23 16 South - 29 26 East)
Date: 15th November 1998
Telescope: 8" Meade telescope & 18mm eyepiece.
Field of view: 36.2 arc minutes
Bright galaxy with a very misty roundish appearance. Getting much brighter to a striking nucleus. Multiply the galaxy wyth tot the south to locate a bright star.
12-inch f5 (EP: 26mm SW, 20mm UW, 7mm UW)
Conditions: The most clear sky possible. Dark moon and stars magnitude 6 and fainter are visible with the naked eye. Excellent clean sky, limited star flickering and brilliant objects. Limiting Magnitude: 6.2.
Spiral Galaxy located in Aries. Faint, well-defined shape. Fairly low surface brightness. It has a faint oval like shape. It almost has an appearance of an elliptical galaxy but it is a spiral galaxy. The galaxy's faint spiral arms are not shown because it is to faint. There are a few faint 3rd to 4th magnitude stars nearby. No darker regions are observed in the galaxy. There are areas of even brightness, towards the central disk. Although I have observed areas of even brightness.
The Messier objects
The Bennett objects
The Caldwell list
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