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Cr 140
ESO428-SC026
RA 07:23:11
Dec -32°02.1'
Open cluster |
Tom Lorenzin: “4M; 40' diameter; 30-plus
members; large and sparse; great binocular object.”
Steve Coe, using a 17.5” f/4.5, notes: “is
a very large open cluster I have called The Tuft in the tail of the dog. There
is a naked eye fuzzy spot at the end of the tail of Canis Major. I have found it
to be an excellant area with the binoculars. It includes a wide double, Dunlop
47, which is 5.3 and 7 mag, sep 99 ", which I see as blue and light yellow
in the telescope at 100X.”
An article published in MNASSA by P M Williams
was entitled "The Open Cluster Cr 140": "Three colour
photoelectric results are presented for 24 stars in the region of Cr 140. From
these results and some photographic photometry the distance of the cluster is
found to be about 360 pc [making it a foreground object between the Sun and the
Orion Arm] and the age 23 million years from the brightest main-sequence stars."
V magnitudes ranged from 5.34 to 10.95.
10-inch f/5 Newtonian: A
10-inch f/5 at 30x shows this off-beat cluster, with two bright members, lying
in a very rich milky way field. It is a pleasing sight, and is sprinkled with
stars 10th mag and fainter, having no apparent boundaries. On the northern tip
of the cluster lies a wide, uneven pair of stars, about 8th mag; the
south-eastern star is decidedly orange. (suburban skies) [AS] |
