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RA: 16h 34m 36s
Dec: −49° 46′ 0″
Ch: MSA:1481, U2:407, SA:22
Ref: SIMBAD, WEBDA, Collinder (1931), DAML02, Archinal&Hynes (2003)
Type: open cluster, 23m
Mag: B=7.58, V=6.7
James Dunlop discovered this cluster from Paramatta, New South Wales, and included it as No. 400 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a pretty large faint nebula, about 6' diameter, easily resolvable, round figure, with two rows of small stars following."
Observed by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "a large irregular cluster of loose stars 11..14th magnitude which fills field; place that of an 8th magnitude star in the preceding part."
The NGC calls it "large, slightly compressed and irregular in shape".
Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 14' and the class as 1 3 m.
Burnham calls it a loose cluster 7' diameter with 60 faint stars. Also known as Harvard 11, the cluster measures 7' across and shines at magnitude 6.7.
Moffat, AFJ & Vogt. N. (1975) "Southern Open Star Clusters VI. UBV-H-beta Photometry of 18 Clusters from Centaurus to Sagittarius." Astron.Astrophys.Suppl., 20, 155-182. [image, table]
"A sequnce of highly reddened late B stars is seen in the cluster diagrams from which .. d = 0.59 kpc. The A supergiant (no 1) is a likely member .. The surrounding OB stars nos 20, 21, are probably background."
"Cat. of Open Cl. south of -45° Decl.", Mem. 17 Mnt Stromlo Obs.
This is probably included in the n.f. region of NGC 6167.
The RNGC (Sulentic and Tifft 1973) notes that this is a 6.5 mag open cluster.
Bennett observed it with a 5-inch short-focus refractor, including it in his list of cometary objects as number 79a. His coded description describes it as an extended object, very faint, easily missed.
*s mostly V > 11.0.
15cm - nice sharply concen cl that protrudes into dk area S of it. there seem to be no outliers S, but they don't stop going N. considering circ- symmetric area 7' diam, there are 70 *s m12+, much concen twd elong grp at center. BS, 27Feb1990, LCO.
10x50 tripod-mounted, 1997-05-02 (clear skies, no light pollution on horizon, dew on binocs):
Three brightest members visible, 10' ,brightness evenly spread [RH]
1998-05-25/26, 6-inch f/8.6 Newtonian, Jonkershoek (exurban). Lim mag 6.2 naked eye; seeing good; dew!
In the sweeper, appears as a regular bunch of large and small stars, with a prominent arc of stars to the SSE.
At 144x, 16 stars are readily counted in this trapezium shaped grouping, measuring 4' x 2' in PA 45°. At the southern corner of the trapezium is a close knot of 4 stars. Although it is a distinct, bright grouping, it is star-poor. It bears magnification well, but has too few stars to be impressive.
In 11x80 binoculars, the cluster looks like two stars involved in faint nebulosity extending towards the north. A two-inch refractor reveals it as a small, somewhat unimpressive cluster, needing averted to see details, although it is easily seen directly. The cluster is borderd on its southern edge by two very bright stars, lying on a northwest-southeast axis. Due north of the southern-most one, (in what turns out to be the centre of the cluster), lies two small stars, and due north of these lies another 10th magnitude star. This latter star marks the apparent end of the cluster. Because of the position of these brighter stars, the cluster appears triangular, although at times there seems to be an elongation slightly towards the east, making it square in shape. The general shape is clearly dictated by the brighter stars. Due north of the cluster lies a pretty wide double, which is shown on the Uranometria 2000.0 charts.
1998-04-23/24, 11x80 tripod-mounted binoculars, Die Boord. Seeing good, transparency below average, dew. "Three stars of differing magnitude, situated on the southern and western edge of an unresolved nebulous patch, 7' across. Although clearly seen as a nebulous object, no further detail can be discerned."
RA: 16h34m36s - DEC: -49o34'36" - Magnitude: 6.7 - Size: 7'
Tel: 16" S/C - 290x - Date: 29 April 2009 – Polokwane – Vis 5.2+-
There is no other way to describe this cluster as the "right up chair cluster" or it could be seen as the letter "h" in shape. A 7.2 white magnitude star sits comfortable on the chair facing south-west. This cluster is one of reasons I love to observe clusters with there very much appreciate character. Around 50 stars involved with fainter members spraying out into the eastern star field.
Location: Camp Site: ( South 23 16 East 29 26 )
Sky conditions: clear fair about 6 magnitude.
Instrument: 8 inch Meade ( super wide-angle 18 mm. Eyepiece ).
Date: April 1997.
Large open cluster with faint and bright groupings of stars running out loosely. Two bright stars visible to the south just outside the cluster in the field visible.
12-inch f/10 SCT (EP: 2-inch 32mm SW 95x 42' fov; 2-inch 14mm UW 218x 23' fov)
Beautiful bright cluster with a characteristic appearance. Relatively dense middle with two prominent star strings running out from the middle-east and north east into the field of view. Outstanding is the 8th magnitude star immediately next to the western edge of the cluster. Stars are denser to the east that gives a convex impression. A lovely yellow star rounds off the tightly woven inner part. Situated 24' arc minutes north is the planetary nebula PK 335.401.1 with a close asterism of 6 stars to its east. (Mag 6.7; size 7.0'. )
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This open clusters form takes the shape of an office chair consisting of stars in the magnitude range from 10th to 12th magnitude whereby I have noticed that NGC 6167 constitutes a bright 9th magnitude star which marks the top of the chair.This clusters stars in comparison are clearly well detached and that the stars in this object are slightly concentrated towards each other with some many fainter companion stars being resolved on the outskirts of NGC 6167.This open cluster measures 12.5'x 7.8'.
The Messier objects
The Bennett objects
The Caldwell list
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