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HD 137809


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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A photometric study of K and M dwarf stars found by Stephenson
Broadband photometry has been obtained for a sample of the K and M dwarfstars found in an objective prism survey by Stephenson (1986). Among thestars with unknown proper motion, about 24 percent of those observedappear from the photometry not to be dwarfs, although the percentagevaries considerably with spectral type. For stars with V less than 11.5and B - V equal to or greater than 1.2, it is estimated that, within thearea surveyed, Stephenson's survey is about 68 percent complete.

E. W. Fick Observatory stellar radial velocity measurements. I - 1976-1984
Stellar radial velocity observations made with the large vacuumhigh-dispersion photoelectric radial velocity spectrometer at FickObservatory are reported. This includes nearly 2000 late-type starsobserved during 585 nights. Gradual modifications to this instrumentover its first eight years of operation have reduced the observationalerror for high-quality dip observations to + or - 0.8 km/s.

Dwarf K and M stars of small proper motion found in a large spectroscopic survey
More than 2000 candidates for K and M dwarf status, generally havingproper motions that are either unknown or less than 0.2 arcsec perannum, have been identified in an objective-prism survey covering theentire sky north of declination - 25 degrees and more than 10 degreesfrom the galactic plane. More than 95 percent have no previousindication that they are dwarfs. Several dozen appear to be visualdouble stars.

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观测天体数据

星座:天秤座
右阿森松:15h28m28.08s
赤纬:-09°09'36.3"
视星:8.304
距离:182.149 天文距离
右阿森松适当运动:9.8
赤纬适当运动:-5.7
B-T magnitude:10.225
V-T magnitude:8.463

目录:
适当名称   (Edit)
HD 1989HD 137809
TYCHO-2 2000TYC 5595-807-1
USNO-A2.0USNO-A2 0750-08983888
HIPHIP 75746

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