13h16m46.51596s, +09° 25′ 26.9590″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h16m 46.51616s[1] |
| Declination | 09° 25′ 26.9672″[1] |
| Characteristics | |
| Spectral type | G0V[2] |
| Apparent magnitude (B) | 5.81 |
| Apparent magnitude (V) | 5.22 |
| Apparent magnitude (R) | 4.8 |
| Apparent magnitude (I) | 4.5 |
| Apparent magnitude (J) | 4.392 ± 0.284 |
| Apparent magnitude (H) | 4.107 ± 0.208 |
| Apparent magnitude (K) | 4.033 ± 0.238 |
| Astrometry | |
| Radial velocity (Rv) | −25.9 ± 0.9 km/s |
| Proper motion (μ) | RA: -335.47±0.19 mas/yr[3] Dec.: 191.04±0.20 mas/yr[3] |
| Parallax (π) | 56.86 ± 0.12 mas[3] |
| Distance | 57.4 ± 0.1 ly (17.59 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.08±0.010[4] |
| Details | |
| Mass | 1.16 ± 0.05[5] M☉ |
| Radius | 1.36 ± 0.04[5] R☉ |
| Luminosity (bolometric) | 2.15 ± 0.15[2] L☉ |
| Surface gravity (log g) | 4.34+0.01 −0.02[6] cgs |
| Temperature | 6291+14 −16[6] K |
| Metallicity [Fe/H] | 0.27+0.02 −0.03[6] dex |
| Rotation | 3.329 days[2] |
| Rotational velocity (v sin i) | 5.47+0.12 −0.17[6] km/s |
| Age | 160[6] Myr |
| Other designations | |
e Vir (e Virginis), BD+10 2531, 59 Vir (59 Virginis), GJ (Gliese, Gl) 504, HD 115383, HIP 64792, HR 5011, SAO 119847, WDS J13168+0925A | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
59 Virginis (e Virginis, HR 5011, Gliese 504) is a G-type main-sequence star, located in constellation Virgo at approximately 57 light-years from Earth.
59 Virginis is known to astronomers at least from 1598, when it was catalogued by Tycho Brahe in his manuscript catalogue of 1004 fixed stars. Brahe designated it as "Parvula sequens vindemiatricem", which means in Latin "A tiny following Vindemiatrix" (that is Epsilon Virginis), and assigned it a visual magnitude6[7][8] (a modern value of its apparent magnitude (in band V) is 5.22). Five years later in 1603 Johann Bayer pictured it on constellation Virgo folio of his celestial atlas "Uranometria" and designated it with number 37, letter "e" (hence its Bayer designation e Virginis, or e Vir) and name "Alæ dextræ sequens", which means in Latin "Following right wing". Bayer also assigned it a visual magnitude 6.[9]
Four hundred fifteen years later in 2013 July Kuzuhara et al. announced discovery of orbiting this star planet b. The discovery was made using 8.2-meter Subaru TelescopeofMauna Kea Observatory, Hawaii.
The star is a young Sun-like star of spectral type G0V and effective temperature 6205 ± 20 K[10] (not much hotter than the Sun). It is also twice brighter than the Sun, its log (L/L⊙) is 0.332 ± 0.032. Its rotation period is 3.329 days.[2] The star exhibit a Sun-like magnetic reversal cycle with the period about 12 years.[11]
Age of the star was estimated as 0.16+0.35
−0.60 Gyr (2013),[2] 4.5+2.0
−1.5 Gyr (2015),[5] and 2.5+1.0
−0.7 Gyr (2017).[10]
In 2013, the discovery of a Jovian planet, b, by direct imaging of the system was announced.[2] A later re-analysis suggested that it may actually be a brown dwarf.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.0+4.5 −1.0 MJ |
80±49 | >56000 | 0.31±0.31 | 141±30° | 0.97±0.07 RJ |
