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RA: 07h 31m 36s
Dec: −17° 11′ 0″
Ch: MSA:320, U2:319, SA:12
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 23mn
Mag: B=7.48, V=7.3
Select a sketch and click the button to view
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "a small but brilliant group of 6 or 8 large stars, 8, 9 and 10th mag, within a very small compass."
Photo Index by Jim Lucyk: Vehrenberg's Atlas of Galactic Neb-1 p123.
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NOCL S.
This cluster was first recorded by Moffat and Vogt.
Moffat, AFJ & Vogt. N. (1975) "Southern Open Star Clusters IV. UBV-H-beta Photometry of 26 Clusters from Monoceros to Vela." Astron.Astrophys.Suppl., 20, 85-124. [image, table]
Anon around BD-16°1999 = Bo 4 + 5. Two previously uncatalogued groups are apparent here as indicated in figures 20abc: Group A = Bo 4 comprises several stars in an obvious concentration in the southern part of figure 19 but also a few stars distributed elsewhere amongst group B (Bo 5). Group A is a foreground cluster with: d = 0.87kpc.
Steve Coe, observing with a 13" f/5.6, notes: "Pretty faint, small, 8 stars counted at 135X. There are two pretty bright stars, approximately 9th mag and 6 other stars of mags 11 to 13 in this small asterism."
Steve Coe, observing with a 13" f/5.6, notes: Pretty bright, pretty large, somewhat compressed, 22 stars counted at 135X.
This grouping is situated just north of Bochum 5 and I do made a sketch of the area. A slight X shape with a handful of stars that runs out to the NE. Faint stars can be between the brighter ones. Bochum 5 consist of only about 6 faint stars in a short string. I had a look for the nebulosity to the east of this cluster and just suspect it. Will go back again.
The Messier objects
The Bennett objects
The Caldwell list
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