HD 92589
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Antlia[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 6.39±0.01[3] |
| Characteristics | |
| Spectral type | G8/K0 III + F/G[4] |
| U−B Template:Engvar | +0.02[5] |
| B−V Template:Engvar | +0.92[5] |
| Astrometry | |
| Radial velocity (Rv) | 11±5.4[6] km/s |
| Proper motion (μ) | RA: −25.072 mas/yr[2] Dec.: +5.872 mas/yr[2] |
| Parallax (π) | 5.5014±0.1586 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.78[1] |
| Details | |
| A | |
| Mass | 2.3[7] Template:Solar mass |
| Radius | 13.07[8] Template:Solar radius |
| Luminosity | 141[2] Template:Solar luminosity |
| Surface gravity (log g) | 2.54[7] cgs |
| Temperature | 5,171±122[9] K |
| Metallicity [Fe/H] | −0.29[10] dex |
| Rotational velocity (v sin i) | Script error: No such module "val".[11] km/s |
| B | |
| Mass | 2.96[12] Template:Solar mass |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist | |
| Database references | |
| SIMBAD | data |
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HD 92589 (HR 4183) is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39,[3] placing it near the limit of naked eye visibility. The system is located about Script error: No such module "val".[2] away based on its parallax shift and has a heliocentric radial velocity of Script error: No such module "val"..[6] This indicates that it is drifting away from the Solar System.
The system has a composite stellar classification of G8/K0 III + F/G.[4] This indicates that the primary spectrum intermediate between a G8 and K0 giant star while the companion is probably a F-type or G-type star. As of 1991, the pair have a projected separation of Script error: No such module "val". along a position angle of Script error: No such module "val"..[13] Both stars take Script error: No such module "val". to orbit each other.[13][12]
At present the visible component has 2.3 times the mass of the Sun[7] but has expanded to 13.07[8] times its girth. It shines with a luminosity 141[2] times greater than the Sun from its enlarged photosphere at an effective temperature of Script error: No such module "val".,[9] which gives the yellow hue of a G-type star. HD 92589A is metal-deficient, with an iron abundance only 51%[10] that of the Sun and spins leisurely with a projected rotational velocity of Script error: No such module "val".,[11] common for giant stars.
References
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- ↑ a b c d e f g Template:Cite Gaia DR3
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