Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Taurus |
Right ascension | 03h 30m 52.38296s [1] |
Declination | +12° 56′ 12.0489″ [1] |
Apparent magnitude (V) | +4.14 [2] |
Characteristics | |
Spectral type | K0-III [3] |
U−B color index | +0.95 [4] |
B−V color index | +1.09 [4] |
Astrometry | |
Radial velocity (Rv) | 14.2±0.3 [2] km/s |
Proper motion (μ) |
RA: 13.537
[1]
mas/
yr Dec.: -2.037 [1] mas/ yr |
Parallax (π) | 6.1081 ± 0.3907 mas [1] |
Distance | 530 ± 30
ly (160 ± 10 pc) |
Absolute magnitude (MV) | −0.96 [2] |
Orbit [5] | |
Primary | 5 Tauri A |
Companion | 5 Tauri B |
Period (P) | 960 days |
Semi-major axis (a) | 4.25 mas [6] |
Eccentricity (e) | 0.397±0.016 |
Inclination (i) | 36.95 [6]° |
Longitude of the node (Ω) | 207.61 [6]° |
Periastron epoch (T) | 2,414,889.565±5.82 |
Argument of periastron (ω) (secondary) | 326.32±2.99° |
Semi-amplitude (K1) (primary) | 8.25±0.15 km/s |
Details | |
5 Tauri A | |
Mass | 4.0±0.7 [7] M☉ |
Radius | 8.5 [8] R☉ |
Luminosity | 329.38 [2] L☉ |
Surface gravity (log g) | 1.97 [9] cgs |
Temperature | 4,644 [9] K |
Metallicity [Fe/H] | 0.05 [9] dex |
Rotational velocity (v sin i) | 10 [10] km/s |
5 Tauri B | |
Mass | 1.13±0.13 M☉ |
Other designations | |
Database references | |
SIMBAD | data |
5 Tauri is a binary star [6] in the zodiac constellation of Taurus, located approximately 530 light years from the Sun. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of +4.14. It is moving further from the Earth with a heliocentric radial velocity of +14 km/s. [2]
This is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4. [5] The primary component is a K-type giant with a stellar classification of K0-III. [3] It has four [7] times the mass of the Sun and is radiating 329 [2] times the Sun's luminosity from its photosphere at an effective temperature of 4,644 K. [9]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Taurus |
Right ascension | 03h 30m 52.38296s [1] |
Declination | +12° 56′ 12.0489″ [1] |
Apparent magnitude (V) | +4.14 [2] |
Characteristics | |
Spectral type | K0-III [3] |
U−B color index | +0.95 [4] |
B−V color index | +1.09 [4] |
Astrometry | |
Radial velocity (Rv) | 14.2±0.3 [2] km/s |
Proper motion (μ) |
RA: 13.537
[1]
mas/
yr Dec.: -2.037 [1] mas/ yr |
Parallax (π) | 6.1081 ± 0.3907 mas [1] |
Distance | 530 ± 30
ly (160 ± 10 pc) |
Absolute magnitude (MV) | −0.96 [2] |
Orbit [5] | |
Primary | 5 Tauri A |
Companion | 5 Tauri B |
Period (P) | 960 days |
Semi-major axis (a) | 4.25 mas [6] |
Eccentricity (e) | 0.397±0.016 |
Inclination (i) | 36.95 [6]° |
Longitude of the node (Ω) | 207.61 [6]° |
Periastron epoch (T) | 2,414,889.565±5.82 |
Argument of periastron (ω) (secondary) | 326.32±2.99° |
Semi-amplitude (K1) (primary) | 8.25±0.15 km/s |
Details | |
5 Tauri A | |
Mass | 4.0±0.7 [7] M☉ |
Radius | 8.5 [8] R☉ |
Luminosity | 329.38 [2] L☉ |
Surface gravity (log g) | 1.97 [9] cgs |
Temperature | 4,644 [9] K |
Metallicity [Fe/H] | 0.05 [9] dex |
Rotational velocity (v sin i) | 10 [10] km/s |
5 Tauri B | |
Mass | 1.13±0.13 M☉ |
Other designations | |
Database references | |
SIMBAD | data |
5 Tauri is a binary star [6] in the zodiac constellation of Taurus, located approximately 530 light years from the Sun. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of +4.14. It is moving further from the Earth with a heliocentric radial velocity of +14 km/s. [2]
This is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4. [5] The primary component is a K-type giant with a stellar classification of K0-III. [3] It has four [7] times the mass of the Sun and is radiating 329 [2] times the Sun's luminosity from its photosphere at an effective temperature of 4,644 K. [9]