Gliese 514, also known as BD+11 2576 or HIP 65859, is a M-type main-sequence star, in the constellation Virgo 24.85 light-years away from the Sun. The proximity of Gliese 514 to the Sun was known exactly since 1988.[11]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Virgo |
Right ascension | 13h 29m 59.7859s[1] |
Declination | 10° 22′ 37.7845″[1] |
Apparent magnitude (V) | 9.029 |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | M0Ve[2] |
Apparent magnitude (J) | 5.902±0.018[3] |
Apparent magnitude (H) | 5.300±0.033[3] |
Astrometry | |
Radial velocity (Rv) | 14.606[4] km/s |
Proper motion (μ) | RA: 1,127.34±0.03[5] mas/yr Dec.: −1,073.888±0.013[5] mas/yr |
Parallax (π) | 131.1013 ± 0.0270 mas[5] |
Distance | 24.878 ± 0.005 ly (7.628 ± 0.002 pc) |
Details | |
Mass | 0.526[6] M☉ |
Radius | 0.611±0.043[6] R☉ |
Luminosity (bolometric) | 0.043[6] L☉ |
Surface gravity (log g) | 4.59[6] cgs |
Temperature | 2,901[7] - 3,727[3] K |
Metallicity [Fe/H] | −0.07±0.07[3] dex |
Rotation | 28.0±2.9[8] |
Rotational velocity (v sin i) | 2.00[9] km/s |
Age | 8.25[10] Gyr |
Other designations | |
Database references | |
SIMBAD | 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. The spectrum peculiarities also affect the accuracy of the star's temperature measurement,[9] with reported values as low as 2901 K.[7] The spectrum of Gliese 514 shows emission lines,[2] but the star itself has a low starspot activity.[12]
Multiplicity surveys did not detect any stellar companions as of 2020.[13]
The Sun is currently calculated to be passing through the tidal tail of Gliese 514's Oort cloud. Thus, future interstellar objects passing through Solar system may originate from Gliese 514.[14]
The existence of a planet on a 15-day orbit around Gliese 514 was suspected since 2019.[15] 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.[8]
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.[16]
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 |
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