Gliese 514
Star in the constellation Virgo From Wikipedia, the free encyclopedia
Gliese 514, also known as BD+11 2576 or HIP 65859, is an M-type main-sequence star, in the constellation Virgo 24.88 light-years away from the Solar System.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 29m 59.78590s[1] |
| Declination | +10° 22′ 37.7845″[1] |
| Apparent magnitude (V) | 9.029[2] |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | M0Ve[3] |
| Apparent magnitude (J) | 5.902±0.018[4] |
| Apparent magnitude (H) | 5.300±0.033[4] |
| Astrometry | |
| Radial velocity (Rv) | 14.12±0.12[1] km/s |
| Proper motion (μ) | RA: 1,127.341 mas/yr[1] Dec.: −1,073.888 mas/yr[1] |
| Parallax (π) | 131.1013±0.0270 mas[1] |
| Distance | 24.878 ± 0.005 ly (7.628 ± 0.002 pc) |
| Details | |
| Mass | 0.562[4] M☉ |
| Radius | 0.611±0.043[5] R☉ |
| Luminosity (bolometric) | 0.043[5] L☉ |
| Surface gravity (log g) | 4.78[4] cgs |
| Temperature | 2,901[6] - 3,727[4] K |
| Metallicity [Fe/H] | −0.07±0.07[4] dex |
| Rotation | 28.0±2.9[7] days |
| Rotational velocity (v sin i) | 2.00[8] km/s |
| Age | 8.25[9] Gyr |
| Other designations | |
| BD+11 2576, HIP 65859, LTT 13925, Ross 490, TYC 895-317-1, 2MASS J13295979+1022376, Gaia EDR3 3738099879558957952[2] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Gliese 514's metallicity Fe/H index is largely unknown, with median values from -0.4 to +0.18 reported in the literature. This discrepancy is due to peculiarities of the stellar spectrum of Gliese 514.[citation needed] The spectrum peculiarities also affect the accuracy of the star's temperature measurement,[8] with reported values as low as 2901 K.[6] The spectrum of Gliese 514 shows emission lines,[3] but the star itself has a low starspot activity.[10]
Multiplicity surveys did not detect any stellar companions as of 2020.[11]
The Sun is currently calculated to be passing through the tidal tail of Gliese 514's Oort cloud. Thus, future interstellar objects passing through the Solar System may originate from Gliese 514.[12]
Planetary system
The existence of a planet on a 15-day orbit around Gliese 514 was first suspected in 2019.[13] However, that planet was not confirmed. Instead, in 2022, one Super-Earth planet, named Gliese 514 b, was discovered on an eccentric 140-day orbit by the radial velocity method. The planetary orbit partially lies within the habitable zone of the parent star with planetary equilibrium temperature, averaged along orbit, equal to 202±11 K.[7]
The infrared excess of the star also indicates the possible presence of a debris disk in the system, albeit at a low signal to noise ratio.[14]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >5.2±0.9 M🜨 | 0.422+0.014 −0.015 |
140.43±0.41 | 0.45+0.15 −0.14 |
— | — |
References
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