HD 70573
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| 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) | ? |
| Temperature | 5737 ± 70 K |
| Metallicity | 66% |
| Rotation | ? |
| Age | 0.101 ± 0.024 Gyr |
| Other designations | |
| 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.
Contents |
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.
| 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]
- ^ a b Setiawan et al. (2007). "Evidence for a Planetary Companion around a Nearby Young Star". The Astrophysical Journal Letters 660 (2): L145–L148. arXiv:0704.0441. Bibcode:2007ApJ...660L.145S. doi:10.1086/518213.
External links [edit]
- "Notes for star HD 70573". The Extrasolar Planet Encyclopaedia.
Coordinates: 
08h 22m 49.9514s, +01° 51′ 33.552″
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