Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Draco |
Right ascension | 10h 35m 05.49379s [1] |
Declination | +75° 42′ 46.4541″ [1] |
Apparent magnitude (V) | 4.86 [2] |
Characteristics | |
Spectral type | G8 III-IIIb [3] |
B−V color index | 0.957±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | +16.6 [4] km/s |
Proper motion (μ) |
RA: −0.599
[1]
mas/
yr Dec.: −17.436 [1] mas/ yr |
Parallax (π) | 4.5045 ± 0.1730 mas [1] |
Distance | 720 ± 30
ly (222 ± 9 pc) |
Absolute magnitude (MV) | +0.46 [2] |
Details | |
Mass | 2.39 [4] M☉ |
Luminosity | 69 [4] L☉ |
Surface gravity (log g) | 2.59 [5] cgs |
Temperature | 4,965±106 [4] K |
Metallicity [Fe/H] | −0.03 [5] dex |
Age | 2.06 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 91190 is a suspected astrometric binary [7] star system in the northern circumpolar constellation of Draco. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.86. [2] The distance to HD 91190, as estimated from its annual parallax shift of 4.5 mas, [1] is around 720 light years. This system is moving further away from the Sun with a heliocentric radial velocity of +17 km/s, [4] having come to within 170 ly some 2.4 million years ago. [2]
At the age of about two billion years, [4] this is an evolved G-type giant star with a stellar classification of G8 III-IIIb. [3] It has 2.39 [4] times the mass of the Sun and is radiating 69 [4] times the Sun's luminosity from its photosphere at an effective temperature of around 4,965 K. [4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Draco |
Right ascension | 10h 35m 05.49379s [1] |
Declination | +75° 42′ 46.4541″ [1] |
Apparent magnitude (V) | 4.86 [2] |
Characteristics | |
Spectral type | G8 III-IIIb [3] |
B−V color index | 0.957±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | +16.6 [4] km/s |
Proper motion (μ) |
RA: −0.599
[1]
mas/
yr Dec.: −17.436 [1] mas/ yr |
Parallax (π) | 4.5045 ± 0.1730 mas [1] |
Distance | 720 ± 30
ly (222 ± 9 pc) |
Absolute magnitude (MV) | +0.46 [2] |
Details | |
Mass | 2.39 [4] M☉ |
Luminosity | 69 [4] L☉ |
Surface gravity (log g) | 2.59 [5] cgs |
Temperature | 4,965±106 [4] K |
Metallicity [Fe/H] | −0.03 [5] dex |
Age | 2.06 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 91190 is a suspected astrometric binary [7] star system in the northern circumpolar constellation of Draco. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.86. [2] The distance to HD 91190, as estimated from its annual parallax shift of 4.5 mas, [1] is around 720 light years. This system is moving further away from the Sun with a heliocentric radial velocity of +17 km/s, [4] having come to within 170 ly some 2.4 million years ago. [2]
At the age of about two billion years, [4] this is an evolved G-type giant star with a stellar classification of G8 III-IIIb. [3] It has 2.39 [4] times the mass of the Sun and is radiating 69 [4] times the Sun's luminosity from its photosphere at an effective temperature of around 4,965 K. [4]