Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..474b&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Aug. 1983, p. 474-479.
Astronomy and Astrophysics
Astronomy
12
Carbon Stars, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, Electrophotometry, Semiregular Variable Stars, Stellar Color, Stellar Magnitude
Scientific paper
Photometric observations of 38 objects in the vicinity of the open cluster NGC 1252 obtained in the UBVRI passbands using a 15.5-arcsec diaphragm and an RCA 31034A photoelectric tube on the 50-cm and 1-m telescopes at ESO in November, 1982, are reported. A visual identification chart and color-color and color-magnitude diagrams are shown, and the photometric data are presented in a table. Fourteen objects, including the N-type semiregular variable TW Hor (HD 20234), are found to belong to the cluster, which has approximate age = 5 x 10 to the 8th years, distance = 470 pc, and diameter (for the 14 objects) = 8 pc. The bolometric magnitude of TW Hor is estimated as -5.32 arcmin, suggesting that it belongs to the young population of the disk.
Bouchet Patrice
Thé Pik-Sin
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