HD 142022
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Octans |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 7.70[2] + 11.19[3] |
| Characteristics | |
| Spectral type | G9IV-V[4] + M1V[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 29.1991±0.0172 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 5.02[2] |
| Details[5][3] | |
| A | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val".[6] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Rotational velocity (v sin i) | Script error: No such module "val". km/s |
| Age | Script error: No such module "val". Gyr |
| B | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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HD 142022 is a binary star[8] system located in the southernmost constellation of Octans. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.70.[2] The distance to this system is Script error: No such module "convert". based on parallax, but it is drifting closer to the Sun with a radial velocity of −10 km/s.[1]
The primary, designated component A, is an old,[8] Population I G-type star with a stellar classification of G9IV-V,[4] showing a spectrum with mixed traits of a main sequence and a subgiant star. It is an estimated 7.6 billion years old and is spinning with a projected rotational velocity of 2 km/s. The star has similar mass and dimensions as the Sun, but has a 55% higher metallicity.[5] It is radiating 89%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 5516 K.[5]
The magnitude 11.19[3] companion has the designation LTT 6384 and appears gravitationally bound to the primary. The pair have an angular separation of Script error: No such module "val"., which corresponds to a projected separation of Script error: No such module "val".. The estimated semimajor axis of their orbit is Script error: No such module "val"..[8] The secondary is a red dwarf star with a stellar classification of M1V.[3]
The primary star has a single known planetary companion, HD 142022 Ab, discovered in 2005.[8] In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.[9]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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- ↑ a b c d e f Template:Cite Gaia DR3
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- ↑ a b Template:Cite Gaia DR2
- ↑ Template:Cite simbad
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