Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hydra |
Right ascension | 09h 54m 12.32596s [1] |
Declination | −25° 55′ 56.3631″ [1] |
Apparent magnitude (V) | 4.88 [2] |
Characteristics | |
Spectral type | K2+ III CN0.5 [3] |
B−V color index | 1.23 [2] |
Astrometry | |
Radial velocity (Rv) | 50.5 [2] km/s |
Proper motion (μ) |
RA: −187.764
[1]
mas/
yr Dec.: +52.746 [1] mas/ yr |
Parallax (π) | 12.5809 ± 0.2161 mas [1] |
Distance | 259 ± 4
ly (79 ± 1 pc) |
Absolute magnitude (MV) | −0.23 [4] |
Details | |
Mass | 1.55 [2] M☉ |
Luminosity | 178 [2] L☉ |
Surface gravity (log g) | 2.35 [5] cgs |
Temperature | 4,415±25 [2] K |
Metallicity [Fe/H] | −0.03 [5] dex |
Age | 4.34 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 85859 is a single [7] star in the equatorial constellation of Hydra. It has an apparent visual magnitude of 4.88, [2] which is bright enough to be visible to the naked eye. The distance to this star, as estimated from its annual parallax shift of 12.6 mas, [1] is 259 light years. It is moving away from the Earth with a heliocentric radial velocity of 50.5 km/s. [2]
The stellar classification of the visible component is K2+ III CN0.5, [3] which matches an evolved K-type giant star with a mild overabundance of CN in the atmosphere. At the age of 4.34 [2] billion years, it is a red clump star, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. [8] The star has 1.55 [2] times the mass of the Sun and is radiating 178 [2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,415 K. [2]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hydra |
Right ascension | 09h 54m 12.32596s [1] |
Declination | −25° 55′ 56.3631″ [1] |
Apparent magnitude (V) | 4.88 [2] |
Characteristics | |
Spectral type | K2+ III CN0.5 [3] |
B−V color index | 1.23 [2] |
Astrometry | |
Radial velocity (Rv) | 50.5 [2] km/s |
Proper motion (μ) |
RA: −187.764
[1]
mas/
yr Dec.: +52.746 [1] mas/ yr |
Parallax (π) | 12.5809 ± 0.2161 mas [1] |
Distance | 259 ± 4
ly (79 ± 1 pc) |
Absolute magnitude (MV) | −0.23 [4] |
Details | |
Mass | 1.55 [2] M☉ |
Luminosity | 178 [2] L☉ |
Surface gravity (log g) | 2.35 [5] cgs |
Temperature | 4,415±25 [2] K |
Metallicity [Fe/H] | −0.03 [5] dex |
Age | 4.34 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 85859 is a single [7] star in the equatorial constellation of Hydra. It has an apparent visual magnitude of 4.88, [2] which is bright enough to be visible to the naked eye. The distance to this star, as estimated from its annual parallax shift of 12.6 mas, [1] is 259 light years. It is moving away from the Earth with a heliocentric radial velocity of 50.5 km/s. [2]
The stellar classification of the visible component is K2+ III CN0.5, [3] which matches an evolved K-type giant star with a mild overabundance of CN in the atmosphere. At the age of 4.34 [2] billion years, it is a red clump star, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. [8] The star has 1.55 [2] times the mass of the Sun and is radiating 178 [2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,415 K. [2]