70 Virginis
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Virgo |
| Right ascension | 13h 28m 25.8s |
| Declination | +13° 46′ 43.5″ |
| Apparent magnitude (V) | +4.98 |
| Characteristics | |
| Spectral type | G2.5Va |
| U-B color index | 0.26 |
| B-V color index | 0.71 |
| V-R color index | 0.39 |
| R-I color index | 0.36 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | 5 km/s |
| Proper motion (μ) | RA: −234.81 mas/yr Dec.: −576.19 mas/yr |
| Parallax (π) | 55.22 ± 0.73 mas |
| Distance | 59.1 ly (18.1 pc) |
| Absolute magnitude (MV) | 3.68 |
| Details | |
| Mass | 1.1 M☉ |
| Radius | 1.76 R☉ |
| Surface gravity (log g) | 3.58 |
| Luminosity | 3.06 L☉ |
| Temperature | 5770 K |
| Metallicity | −0.03 [Fe/H] |
| Rotation | unknown |
| Age | 8,200 million years |
| Other designations | |
| Database references | |
| SIMBAD | data |
70 Virginis is a yellow dwarf star approximately 59 light-years away in the constellation Virgo. It is rather unusually bright for its spectral type and may be just starting to evolve into the subgiant phase.
In 1996, 70 Virginis was discovered to have an extrasolar planet in orbit around it.[1]
[edit] Planetary system
| Companion (in order from star) |
Mass (MJ) |
Orbital period (days) |
Semimajor axis (AU) |
Eccentricity |
|---|---|---|---|---|
| b | >7.49 ± 0.61 | 116.6884 ± 0.0044 | 0.484 ± 0.028 | 0.4007 ± 0.0035 |
[edit] References
- ^ G. Marcy et al. (1996). "A Planetary Companion to 70 Virginis". Astrophysical Journal 464: L147–L151.
[edit] External links
- SIMBAD: HD 117176 -- High proper-motion Star
- SolStation: 70 Virginis
- Extrasolar Planets Encyclopaedia: 70 Virginis
- Extrasolar Visions: 70 Virginis
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