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HD 197814


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First radial velocities for 146 bright F- and G-type stars
We have obtained an average of 5.7 radial velocities for 146 northernstars of types F and G (all luminosity classes) listed in 'A Supplementto the Bright Star Catalogue' as having no previously known radialvelocity measures. Those were obtained with charge coupled devices(CCDs) and a cross-correlation technique; the intrinsic velocityaccuracy, based on stars of apparently constant velocity, is probablyless than +/- 0.3 km/s per mean. Of those stars 14% are newly discoveredSB2 stars. The prevelance of rapid profile variations (in minutes orhours) in most of the broad-lined F-type stars makes it difficult toobtain accurate measures for them.

UvbyH-beta photoelectric and CCD photometry of IC 4651
An analysis of uvbyH-beta photoelectric and CCD photometry of IC4651shows a Fe/H abundance ratio of 0.23 + or - 0.02, an E(b-y) value of0.064 + or - 0.006, and an age on the system of VandenBerg (1985) of 2.4+ or - 0.2 x 10 to the 9th yr. Scatter noted in the clustercolor-magnitude diagram can be explained by binaries, nonmembers, and ablueward hook due to the hydrogen-exhaustion phase. The cluster turnoffindicates some evidence for the presence of bimodality which issuggested to be the result of nonstandard evolution near theBohm-Vitense gap.

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

Lichtelektrische UBV-Photometrie von Standardsternen und in vier Sternfeldern am Äquator
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Kova
Sað Açýklýk:20h46m01.21s
Yükselim:-00°20'25.5"
Görünürdeki Parlaklýk:6.769
Uzaklýk:200 parsek
özdevim Sað Açýklýk:3.7
özdevim Yükselim:-6.7
B-T magnitude:7.97
V-T magnitude:6.869

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 197814
TYCHO-2 2000TYC 5178-70-1
USNO-A2.0USNO-A2 0825-18687518
HIPHIP 102480

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