Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..422t&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, June 1984, p. 422-428. Research supported by the Na
Astronomy and Astrophysics
Astronomy
10
Astronomical Photometry, Cepheid Variables, Open Clusters, Ubv Spectra, B Stars, Interstellar Extinction
Scientific paper
Photoelectric UBV photometry is presented for twelve 12th- to 15th-magnitude stars lying within 2 arcmin of the 22-day Cepheid WZ Sgr. Eight of these stars are identified as probable B stars of similar reddening (0.56 plus or minus 0.02, relative to a B0 star), and it is argued from star counts and photometric distance estimates that seven of these objects belong to a newly discovered, sparsely populated open cluster that is 1.71 plus or minus 0.06 kpc distant and centered only 3.6 arcmin northwest of WZ Sgr. WZ Sgr is demonstrated to be an excellent candidate for membership in this sparse cluster, based upon its similarity in reddening and age to cluster stars and upon its inferred luminosity of -4.88 plus or minus 0.10 as a cluster member.
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