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HD 31743


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Photometric and spectroscopic analysis of high Galactic latitude molecular clouds. I - Distances and extinctions of stars toward 25 selected regions
The paper presents new photoelectric photometry in the UBV, uvby, andH-beta systems for 320 stars at high Galactic latitudes, selected fortheir proximity to the densest portions of a variety of high Galacticlatitude atomic and molecular clouds. Low-resolution digital spectra areemployed to classify 115 of the stars. Several novel techniques aredeveloped for automatic digital spectral classification, and fordereddening Stromgren uvby-beta and Johnson UBV,H-beta photometry. Anempirical determination of the errors in the derived dereddened colors,and techniques for converting between the two photometric systems arepresented on the basis of the analysis of a statistically significantsample of 1480 stars with complete data sets in both photometric systemsand with an accurate MK spectral type. New constraints on the distancesto several clouds are presented.

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Osservazione e dati astrometrici

Costellazione:Eridano
Ascensione retta:04h57m44.64s
Declinazione:-13°42'17.9"
Magnitudine apparente:7.571
Distanza:193.424 parsec
Moto proprio RA:-11.9
Moto proprio Dec:-2.5
B-T magnitude:7.648
V-T magnitude:7.578

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 31743
TYCHO-2 2000TYC 5329-2017-1
USNO-A2.0USNO-A2 0750-01165733
HIPHIP 23058

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