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HD 155231


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New UBVRI photometry for 900 supergiants
A description is presented of the results obtained in connection with asystematic program of supergiant photometry on the Johnson UBVRI system.During the eight years after the start of the program, almost 1000 starshave been observed, about 400 three or more times each. The originalselection of stars used the spectral type catalog of Jaschek et al.(1964) to choose supergiants. Since observations were possible from bothChile and Canada, no declination limits were imposed, and no particularselection criteria were imposed other than to eliminate carbon stars.These are so red as to require enormous extrapolations of thetransformation equations.

MK classifications for F-and G-type stars. 3.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974AJ.....79..682H&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Ofiuco
Ascensione retta:17h10m15.56s
Declinazione:+00°28'53.8"
Magnitudine apparente:6.824
Distanza:76.22 parsec
Moto proprio RA:-13.2
Moto proprio Dec:3.6
B-T magnitude:8.033
V-T magnitude:6.924

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 155231
TYCHO-2 2000TYC 399-499-1
USNO-A2.0USNO-A2 0900-09399177
HIPHIP 83999

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