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NGC 3255 (6,906 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 3255

NGC 3255, Cl Collinder 221, C 1024-604, Cl VDBH 96, Ocl 817, h 3253, GC 2113

RA: 10h 26m 32s
Dec: −60° 40′ 42″

Con: Carina
Ch: MSA:992, U2:426, SA:25

Ref: SIMBAD, Collinder (1931), DAML02, Archinal&Hynes (2003)

(reference key)

Type: open cluster, 12m

Mag: B=11.54, V=11

Size: 2′
PA: ?

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "a very compressed knot or cluster of milky way stars, 4' in diameter, somewhat insulated from the rest. Stars .. 15th mag."

Published comments

Trumpler, R.J. (1928)

Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 3' and the class as 1 2 p.

Hogg, A.R. (1965)

"Cat. of Open Cl. south of -45° Decl.", Mem. 17 Mnt Stromlo Obs.

A small cluster on a 'edge'. There is a suggestion of a second cluster centred 5' to the south of NGC 3255 which may account for the larger diam. estimated by Mme. Barkhatova's figure of 8'. The clusters are in the vicinity of the Eta Carinae complex and as there is considerable variation in star density across the plate, the field counts have been made relatively close to the cluster.

Moffat, A.F.J. & Vogt. N. (1975)

Moffat, AFJ & Vogt. N. (1975) "Southern Open Star Clusters V. UBV-H-beta Photometry of 20 Clusters in Carina.." Astron.Astrophys.Suppl., 20, 125-153. [image, table]

"Of the 8 stars observed, only nos 2, 5, 6, 7 appear to be related to the cluster. As a very tentative solution, we give .. d = 1.4: kpc."

They list 8 stars with V: 12.44 to 14.09

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag open cluster.

Modern observations

Brian Skiff

QBS: brtr *s accurately described in 15cm.

15cm - consp @ 80x as sm well concen grainy haze w/two f *s on S side. 195x: 4'

diam, circ, two m13.5 *s: one in S side, the other SE at edge of haze.

the remaining 6-8 *s all m14.5+. mod broad concen. BS, 21Feb1990, LCO.

Contemporary observations

Magda Streicher

(no date)

16-inch f/10 SCT (127x)

Very soft round ball of splintering lights. Resolved stars lovely star field. West of Hogg in a very busy star field.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

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