Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Hydra |
Right ascension | 08h 40m 01.47182s [1] |
Declination | −12° 28′ 31.3433″ [1] |
Apparent magnitude (V) | 4.98 [2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K3 III [3] |
B−V color index | 1.415±0.001 [2] |
Astrometry | |
Radial velocity (Rv) | −7.8±0.6 [4] km/s |
Proper motion (μ) |
RA: −81.619
[1]
mas/
yr Dec.: −1.646 [1] mas/ yr |
Parallax (π) | 8.7394 ± 0.1769 mas [1] |
Distance | 373 ± 8
ly (114 ± 2 pc) |
Absolute magnitude (MV) | −0.40 [2] |
Details | |
Radius | 32.7+0.5 −2.6 [1] R☉ |
Luminosity | 267±6 [1] L☉ |
Surface gravity (log g) | 1.91 [5] cgs |
Temperature | 4,080+173 −30 [1] K |
Metallicity [Fe/H] | −0.21 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
6 Hydrae is a single [7] star in the equatorial constellation of Hydra, [6] located 373 light-years away from the Sun. [1] It has the Bayer designation a Hydrae; 6 Hydrae is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.98. [2] It is moving closer to the Earth with a heliocentric radial velocity of −8 km/s. [4] Eggen (1995) listed it as a proper motion candidate for membership in the IC 2391 supercluster. [8]
This is an aging giant star with a stellar classification of K3 III, [3] which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. As a consequence, it has expanded to 33 [1] times the radius of the Sun. The star is radiating 267 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,080 K. [1]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Hydra |
Right ascension | 08h 40m 01.47182s [1] |
Declination | −12° 28′ 31.3433″ [1] |
Apparent magnitude (V) | 4.98 [2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K3 III [3] |
B−V color index | 1.415±0.001 [2] |
Astrometry | |
Radial velocity (Rv) | −7.8±0.6 [4] km/s |
Proper motion (μ) |
RA: −81.619
[1]
mas/
yr Dec.: −1.646 [1] mas/ yr |
Parallax (π) | 8.7394 ± 0.1769 mas [1] |
Distance | 373 ± 8
ly (114 ± 2 pc) |
Absolute magnitude (MV) | −0.40 [2] |
Details | |
Radius | 32.7+0.5 −2.6 [1] R☉ |
Luminosity | 267±6 [1] L☉ |
Surface gravity (log g) | 1.91 [5] cgs |
Temperature | 4,080+173 −30 [1] K |
Metallicity [Fe/H] | −0.21 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
6 Hydrae is a single [7] star in the equatorial constellation of Hydra, [6] located 373 light-years away from the Sun. [1] It has the Bayer designation a Hydrae; 6 Hydrae is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.98. [2] It is moving closer to the Earth with a heliocentric radial velocity of −8 km/s. [4] Eggen (1995) listed it as a proper motion candidate for membership in the IC 2391 supercluster. [8]
This is an aging giant star with a stellar classification of K3 III, [3] which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. As a consequence, it has expanded to 33 [1] times the radius of the Sun. The star is radiating 267 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,080 K. [1]