HD 70573

HD 70573
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydra
Right ascension 8h 22m 49.9514s
Declination +01° 51 33.552
Apparent magnitude (V) +8.70
Characteristics
Spectral type G1.2V
B−V color index 0.59
Variable type none
Astrometry
Radial velocity (Rv)+19.5 km/s
Proper motion (μ) RA: -54.00 mas/yr
Dec.: -48.20 mas/yr
Parallax (π)21.9 mas
Distance149 ly
(45.7 pc)
Absolute magnitude (MV)+5.40
Details
Mass1 ± 0.1 M
Radius? R
Luminosity0.60 L
Surface gravity (log g)? cgs
Temperature5737 ± 70 K
Metallicity66%
Rotation?
Age0.101 ± 0.024 Gyr
Other designations
BD+02º 1951, SAO 116694
Database references
SIMBADdata

HD 70573 is a 9th magnitude star approximately 149 light-years away in the constellation of Hydra. The star is young, only 101 million years old.

Planetary system

On March 19, 2007, an extrasolar planet was announced, having been discovered by the radial velocity method.[1] This is thus far the youngest host star discovered to have an orbiting planet.

The HD 70573 planetary system[1]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >6.1 ± 0.4 MJ 1.76 ± 0.05 851.8 ± 11.6 0.4 ± 0.1

See also

References

External links

Coordinates: 08h 22m 49.9514s, +01° 51′ 33.552″


This article is issued from Wikipedia - version of the Saturday, February 28, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.