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RA: 07h 27m 6s
Dec: +13° 35′ 0″
Ch: MSA:200, U2:184, SA:12
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 42m
Mag: B=8.81, V=8
Synonyms: H VIII-011
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a cluster of scattered stars."
Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 14' and the class as 3 2 p.
The RNGC (Sulentic and Tifft 1973) notes that this is a 9.5 mag open cluster.
Listed by the Herschel Club, described as "very faint and elusive, no shape, scattered, fairly rich, stands out well using averted vision. 8-inch, 48x."
Houston notes that recent studies suggest this may be a line-of-sight asterism and not a true open cluster. He writes: "regardless of its nature, you'll find up to 30 stars scattered across a 1/4 degree circle of sky. Their combined light is equal to a star of magnitude 8.0."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "9M; 12' diameter; 30-plus 10M and dimmer members; faint and sparse; may not be a true association."
Steve Coe, observing with a 13" f/5.6, notes: "Bright, large, somewhat compressed. 40 stars counted at 100X. Seen with 11X80 finder. This nice cluster is elongated 2X1."
6cm - just vis, lgr than N2355.
15cm - 30' NW of PK205+14 1, just obs'd. mod well sep from fld @ 80x. 10' diam excluding a clump of stragglers SE containing two m9.5-10 *s. 140x: 40 *s wkly concen in irreg bounded cl. brtst is m10.5 * on S side, remainder m11.5+. BS, 10Feb1991, Anderson Mesa.
25cm - mod br, seen @ 47x. 20' diam w/40 *s m9+. not much concen, irreg distributed. to S end is tail containing two m9 *s.
30cm - 149x: loose, poor cl w/35 *s in 15' area. elong pa110, shaped like a lg triangle.
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (76x, 218x)
The overall shape of this cluster is triangular, with faint stars scattered randomly throughout. Perhaps a dozen stars were seen with averted vision. Sh2-274 is close to NGC 2395. The faint stars form a arrow shape with very faint stars pointing NE. A very short string point SW connected to the main stars.
1997 October 28, Tue/Wed: Jonkershoek, seeing 3, transparency 3, sky darkness 4, lim.mag. at south pole 6.0 (naked eye), 10.7 (binoculars). 11x80 tripod-mounted. "A definite but ill-defined fuzzy patch, perhaps 3 or 4 stars seen."
1994-02-14 01:00 Die Boord 11x80 tripod-mounted. Not found.
Observing site: Little Tycho Observatory
[7h 27m 6s, 13° 35m 0s] In these light polluted skies, hardly seems a cluster. The field was found, but only the central star and hints of a few fainter ones close by were seen. Confirmed by WikiSky. Very few stars in this one, hardly a cluster.
Location:Blesfontein Guest Farm,Sutherland.
Sky Conditions:The most crystal 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.
This open cluster has the shape of a key stone where the stars in this cluster is well arranged in a north south direction.In this cluster I have counted 38 stars within a fixed diameter.In this open cluster most of the stars are nearly as bright as each other and that I have noticed that this cluster consists of 9.5-10.2 magnitude stars.This open clusters stars are slightly concentrated towards each other.This open cluster measures 11.2'x8.8'with P.A:North/South.Chart No.211,NSOG Vol.1.
The Messier objects
The Bennett objects
The Caldwell list
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