HD 70573

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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
Distance 149 ly
(45.7 pc)
Absolute magnitude (MV) +5.40
Details
Mass 1 ± 0.1 M
Radius R
Luminosity 0.60 L
Surface gravity (log g) cgs
Temperature 5737 ± 70 K
Metallicity 66%
Rotation ?
Age 0.101 ± 0.024 Gyr
Other designations
BD+02º 1951, SAO 116694
Database references
SIMBAD data

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[edit]

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[edit]

References[edit]

External links[edit]

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