HD 129132
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 6.13[1] |
| Characteristics | |
| Spectral type | G0V[3] or F4III[4] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: +15.157[2] mas/yr Dec.: −39.067[2] mas/yr |
| Parallax (π) | 10.0986±0.1285 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.82[1] |
| Orbit[6] | |
| Primary | Aa1 |
| Companion | Aa2 |
| Period (P) | Script error: No such module "val". |
| Semi-major axis (a) | Script error: No such module "val". |
| Eccentricity (e) | Script error: No such module "val". |
| Periastron epoch (T) | Script error: No such module "val". |
| Semi-amplitude (K1) (primary) | Script error: No such module "val". km/s |
| Orbit[6] | |
| Primary | Aa |
| Companion | Ab |
| Period (P) | Script error: No such module "val". |
| Semi-major axis (a) | Script error: No such module "val"." (Script error: No such module "val".) |
| Eccentricity (e) | Script error: No such module "val". |
| Inclination (i) | Script error: No such module "val".° |
| Periastron epoch (T) | Script error: No such module "val". |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Semi-amplitude (K1) (primary) | Script error: No such module "val". km/s |
| Details | |
| Aa1 | |
| Mass | 1.99[7] Template:Solar mass |
| Radius | Script error: No such module "val".[5] Template:Solar radius |
| Luminosity | Script error: No such module "val".[5] Template:Solar luminosity |
| Surface gravity (log g) | 3.41[7] cgs |
| Temperature | Script error: No such module "val".[5] K |
| Rotational velocity (v sin i) | 25.3[7] km/s |
| Age | 1.00[7] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Aa2 | |
| Mass | 1.29[8] Template:Solar mass |
| Ab | |
| Mass | 1.82[8] Template:Solar mass |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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HD 129132 is a triple star[6] system in the northern constellation of Boötes. It is dimly visible to the naked eye with a combined apparent visual magnitude of 6.13.[1] The distance to this system is approximately 382 light years based on parallax, and it is drifting further away from the Sun with a radial velocity of +1.7 km/s.[5]
This system was found to be a spectroscopic binary by the Dominion Astrophysical Observatory in 1923. It was then shown to be a triple star system in 1937 by William E. Harper and Guy H. Blanchet.[10] The inner pair have an orbital period of 101.6 days and an eccentricity of 0.117, with the primary forming the visible component of this pair. The third component forms a visual system with the inner pair, orbiting with a period of Script error: No such module "convert". and an eccentricity of 0.073.[6][11]
The primary component appears to be an aging giant star with a stellar classification of F4III,[4] although it has also been classed as a G-type main-sequence star of type G0V.[3] It is around a billion years old with twice the mass of the Sun.[7] The star has expanded to 17 times the Sun's radius[5] and is radiating 236 times the luminosity of the Sun[5] at an effective temperature of 5,488 K.[5] It is spinning with a projected rotational velocity of 25.3 km/s.[7]
References
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- ↑ a b c d e Template:Cite Gaia DR3
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- ↑ a b c d e f g h Template:Cite Gaia DR2
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ a b c d e f Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
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- ↑ Script error: No such module "Citation/CS1".
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