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HD 73031


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Investigation of the Praesepe cluster. I - Identification of halo members
Coravel radial velocities and UBVRI (Kron) photometry of 117 starsselected by their proper motion in the region surrounding Praesepe (NGC2632, C 0837 + 201) have permitted identification of 48 members of thecluster halo, up to a distance of 4 deg from the cluster center. The 43(F5-K0) new members represent 51 percent of the number of nucleusmembers known in this spectral interval. Ten spectroscopic binaries havebeen discovered among the F5-F0 members, resulting in a frequency of 23percent, which rises to 33 percent four probable binaries are taken intoaccount. Six orbits have been obtained, with periods ranging from 1.2 to143 d. Four additional binaries have been detected among the non-memberstars.

A Proper Motion Membership Study of Praesepe
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1983AJ.....88..215J&db_key=AST

Novye chleny korony skopleniia Iasli
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Photometrie der Präsepe-Umgebung mit kurzbrennweitigen Schmidt-Spiegeln. Mit 7 Textabbildungen
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Observation and Astrometry data

Constellation:Cancer
Right ascension:08h36m40.05s
Declination:+18°28'07.9"
Apparent magnitude:8.823
Proper motion RA:-27.2
Proper motion Dec:-20.8
B-T magnitude:9.355
V-T magnitude:8.867

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 73031
TYCHO-2 2000TYC 1395-1339-1
USNO-A2.0USNO-A2 1050-05795881
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