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RA: 07h 31m 0s
Dec: −16° 56′ 0″
Ch: MSA:320, U2:274, SA:12
Ref: SIMBAD, DAML02, Archinal&Hynes (2003)
Type: open cluster, 12pn
Mag: B=7.74, V=7
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 B = Bo 5 consists of 7 stars, associated with its own local nebulosity as seen on POSS charts .. d = 2.29kpc .. the central stars 18, 19 and especially 17 are reddened more than the rest. This group coincides with the reflection nebula no 97 of van den Bergh (1966). Only one illuminating star was quoted by van den Bergh (BD-16°2003 = star no 21 here) and observed by Racine (1968). In view of the probable presence of at least one O star, some of the nebulosity may be HII in addition to reflection. Indeed, group B appears to coincide with the HII region S 302 ..."
Steve Coe, observing with a 13" f/5.6, notes: "7 stars counted at 100X. This small asterism has one orange star and 6 white stars in a horseshoe shape."
The Messier objects
The Bennett objects
The Caldwell list
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