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Cl VDBH 117 (7,764 of 18,816)

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Cl Melotte 105

Cl VDBH 117, C 1117-632, Cl Melotte 105, Cl Collinder 246, Bennett 47, Cl Melotte 105

RA: 11h 19m 30s
Dec: −63° 30′ 0″

Con: Carina
Ch: MSA:1004, U2:449, SA:25

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

(reference key)

Type: open cluster, 12r

Mag: B=9.05, V=8.5

Size: 5′
PA: ?

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Published comments

Union Observatory Circulars

Discovered by Worssell of the Union Observatory.

Union Observatory Circulars, Nos. 45-76, p444. "In Dreyer's Second Index Catalogue of Nebulae there will be found the following reference: No. 2714 .... Cl., pC.

Near this position there are in reality two star clusters, whose positions have been roughly determined from a photograph obtained with the Franklin-Adams star camera ... The North preceding of these two clusters agrees in position with Bailey's cluster (No. 2714) but the description does not agree. This cluster is an open large cluster (12' in diameter) of stars of approximately the same magnitude and is of the x Carinae type. It lies immediately North of CPD -62° 1953. The South following cluster is a compact irregular cluster, about 2' in diameter, of the kappa Crucis type, and is a more striking object than its North preceding neighbour. It is due following CPD -62° 1959. The 1900 positions of these clusters are

11h 13m 32s, -62° 7.3'

11h 15m 28s, -62° 57.6'

- H.E.Worssell "

In (2000), these positions are

11:17:50, -62:40:05 ( = Mel 104, IC 2714)

11:19:47, -63:30:27 ( = Mel 105, ESO 93 SC 7)

Hogg, A. R. (1965)

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

Melotte, P.J. (1915)

A catalogue of star clusters shown on Franklin-Adams chart plates. Mem.R.A.S., 60(5), 175-186.

A well-defined small cluster. Stars fairly bright. Not in NGC or Bailey.

Raab, S. (1922) "A research on open clusters"

Discussed, Based on F-A plates.

Modern observations

ASV Journal

ASV Journal Vol 24 No 3 June 1971: "resembles a globular - difficult in 2-inch 64x."

Brian Skiff

QBS: fld not esp obscured; dk bands mostly due W of br *, also SW of *.

15cm - nice mod br cl. 140x: 6' diam w/30 *s and some haziness (*s nr threshold too close to res). well isolated from fld thanks to general dk area SE of eta Carinae region. some elong dk streaks S & SW of cl twd m5 * 1 deg SW. cl *s m12+. BS, 18Feb1990, LCO.

Contemporary observations

Auke Slotegraaf

Easy in a 10-inch f/5 at 30x, appears as an irregular milky patch lying in a milky way starfield, and appears clearly separated from the background. Individual stars cannot be seen at 30x, but at 120x stars are clearly seen, and the cluster appears angular, quite small, the 15-20 members lying close together making a very tight, compact group. At low powers, they merge into an irresolvable milky mass. Nice contrast with IC 2714, which lies to the north in the same low-power field.

1994-02-06

1994-02-06, Die Boord, 11x80's tripod-mounted. Easy, looks like a tiny, reasonably bright globular cluster.

1997 April 14

1997 April 14, 02:00 - 04:00 Jonkershoek. 11x80's tripod-mounted. Easy to see. Looks like a globular cluster; or a miniature version of nearby IC 2714 - only much smaller. Surrounding field is 'murky' with dark nebulosity.

Magda Streicher

(no date)

16-inch f/10 SCT

Dense, faint grouping of approximately 25 stars in a short string and W shape. The brightest stars are between 10 and 11 magnitude and form a capital letter W, filled in with faint stars (127x). With higher magnification (290x) faint strings can be discerned to the north. A very dainty cluster in a speckled star-field.

Faint stars more to the West with lines in a NE to SW direction.( (Mag 8.5; size 4.0'; number of stars = 70.))

Richard Ford

2013 May 13th, Saturday

Location:Perdeberg.

Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.

Instrument:12-inch Dobsonian.

This open cluster has the resemblance of an unresolved haze which consists of 12th to 13th magnitude stars.I have noticed that this objects stars are well detached whereby I have counted 30 stars in this cluster and that this faint open clusters stars are strongly concentrated towards each other.This open cluster measures 4.7'x 3.3'.

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