Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Virgo |
Right ascension | 12h 53m 11.1564s [1] |
Declination | −03° 33′ 11.1482″ [1] |
Apparent magnitude (V) | 6.11 |
Characteristics | |
Spectral type | F6V [2] |
B−V color index | 0.49 [2] |
Astrometry | |
Proper motion (μ) |
RA: −262.638±0.113
[1]
mas/
yr Dec.: −3.853±0.100 [1] mas/ yr |
Parallax (π) | 30.0702 ± 0.0541 mas [1] |
Distance | 108.5 ± 0.2
ly (33.26 ± 0.06 pc) |
Details | |
Mass | 1.18 ± 0.12 [2] M☉ |
Radius | 1.45 ± 0.07 [2] R☉ |
Luminosity | 3.48 [note 1] L☉ |
Temperature | 6557 ± 96 [2] K |
Metallicity [Fe/H] | 0.07 [2] dex |
Age | 1.9+0.6 −0.7 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
38 Virginis is an F-type main sequence star in the constellation of Virgo. It is around 108 light years distant from the Earth. [2] [1]
The name 38 Virginis derives from the star being the 38th star in order of right ascension catalogued in the constellation Virgo by Flamsteed in his star catalogue. The designation b of 38 Virginis b derives from the order of discovery and is given to the first planet orbiting a given star, followed by the other lowercase letters of the alphabet. [4] In the case of 38 Virginis, only one was discovered, which was designated b. [2]
38 Virginis is an F-type main sequence star that is approximately 118% the mass of and 145% the radius of the Sun. It has a temperature of 6557 K and is about 1.9 billion years old. In comparison, the Sun is about 4.6 billion years old [5] and has a temperature of 5778 K. [6]
The star is metal-rich, with a metallicity ([Fe/H]) of 0.07 dex, or 117% the solar amount. Its luminosity ( L☉) is 3.48 times that of the Sun.
A companion star is cataloged in the CCDM at a separation of half an arcsecond. [7]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 4.51 ± 0.5 MJ | 1.82 ± 0.07 | 825.9 ± 6.2 | 0.03 ± 0.04 | — | — |
The star is known to host one exoplanet, 38 Virginis b, discovered in 2016. This planet has a relatively low eccentricity out of any long-period giant exoplanet discovered, with an eccentricity of 0.03. The planet has a mass of around 4.5 times that of the planet Jupiter. [2] Its orbit very likely puts it and any moons it may have in the habitable zone of its star.[ citation needed]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Virgo |
Right ascension | 12h 53m 11.1564s [1] |
Declination | −03° 33′ 11.1482″ [1] |
Apparent magnitude (V) | 6.11 |
Characteristics | |
Spectral type | F6V [2] |
B−V color index | 0.49 [2] |
Astrometry | |
Proper motion (μ) |
RA: −262.638±0.113
[1]
mas/
yr Dec.: −3.853±0.100 [1] mas/ yr |
Parallax (π) | 30.0702 ± 0.0541 mas [1] |
Distance | 108.5 ± 0.2
ly (33.26 ± 0.06 pc) |
Details | |
Mass | 1.18 ± 0.12 [2] M☉ |
Radius | 1.45 ± 0.07 [2] R☉ |
Luminosity | 3.48 [note 1] L☉ |
Temperature | 6557 ± 96 [2] K |
Metallicity [Fe/H] | 0.07 [2] dex |
Age | 1.9+0.6 −0.7 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
38 Virginis is an F-type main sequence star in the constellation of Virgo. It is around 108 light years distant from the Earth. [2] [1]
The name 38 Virginis derives from the star being the 38th star in order of right ascension catalogued in the constellation Virgo by Flamsteed in his star catalogue. The designation b of 38 Virginis b derives from the order of discovery and is given to the first planet orbiting a given star, followed by the other lowercase letters of the alphabet. [4] In the case of 38 Virginis, only one was discovered, which was designated b. [2]
38 Virginis is an F-type main sequence star that is approximately 118% the mass of and 145% the radius of the Sun. It has a temperature of 6557 K and is about 1.9 billion years old. In comparison, the Sun is about 4.6 billion years old [5] and has a temperature of 5778 K. [6]
The star is metal-rich, with a metallicity ([Fe/H]) of 0.07 dex, or 117% the solar amount. Its luminosity ( L☉) is 3.48 times that of the Sun.
A companion star is cataloged in the CCDM at a separation of half an arcsecond. [7]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 4.51 ± 0.5 MJ | 1.82 ± 0.07 | 825.9 ± 6.2 | 0.03 ± 0.04 | — | — |
The star is known to host one exoplanet, 38 Virginis b, discovered in 2016. This planet has a relatively low eccentricity out of any long-period giant exoplanet discovered, with an eccentricity of 0.03. The planet has a mass of around 4.5 times that of the planet Jupiter. [2] Its orbit very likely puts it and any moons it may have in the habitable zone of its star.[ citation needed]