Home     Getting Started     To Survive in the Universe    
Inhabited Sky
    News@Sky     Astro Photo     The Collection     Forum     Blog New!     FAQ     Press     Login  

HD 157809


Contents

Images

Upload your image

DSS Images   Other Images


Related articles

ICCD speckle observations of binary stars. III - A survey for duplicity among high-velocity stars
An analysis of speckle interferometry data for 182 stars has resulted inthe detection of 10 binaries, four of which are newly resolved systems.After correcting for selection effects, the data are found to becompatible with a total frequency for high-velocity long-period doubleswhich is as large as that for low-velocity stars. Based on spectroscopicparallaxes and visual magnitudes, these binaries are found to be within100 pc of the sun, with eight having linear separations of less than 20AU. Four of the binaries are determined to have periods of less than 20yr.

Submit a new article


Related links

  • - No Links Found -
Submit a new link


Member of following groups:


Observation and Astrometry data

Constellation:Ophiucus
Right ascension:17h25m17.42s
Declination:+06°05'41.9"
Apparent magnitude:9.094
Proper motion RA:-50.4
Proper motion Dec:-54.4
B-T magnitude:10.103
V-T magnitude:9.178

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 157809
TYCHO-2 2000TYC 413-309-1
USNO-A2.0USNO-A2 0900-09759153

→ Request more catalogs and designations from VizieR