Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 58m 40.75s [1] |
Declination | −44° 48′ 12.9″ [1] |
Apparent magnitude (V) | +3.87 [2] |
Characteristics | |
Spectral type | B2 IV/V [3] |
B−V color index | −0.208±0.011 [2] |
Astrometry | |
Radial velocity (Rv) | +9.2±1.4 [4] km/s |
Proper motion (μ) |
RA: −27.51±0.15
[1]
mas/
yr Dec.: −22.44±0.13 [1] mas/ yr |
Parallax (π) | 7.63 ± 0.16 mas [1] |
Distance | 427 ± 9
ly (131 ± 3 pc) |
Absolute magnitude (MV) | −1.72 [2] |
Details | |
Mass | 7.9±0.1 [5] M☉ |
Radius | 3.74±0.34 [6] R☉ |
Luminosity | 1,884 [2] L☉ |
Surface gravity (log g) | 4.15±0.07 [6] cgs |
Temperature | 21,411±377 [6] K |
Rotational velocity (v sin i) | 124 [4] km/s |
Age | 13.0±2.0 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Upsilon1 Centauri, Latinized from υ1 Centauri, is a single [8] star in the southern constellation of Centaurus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.87. [2] The distance to this object is approximately 427 light years based on parallax, [1] and is receding with a radial velocity of +9 km/s. [4] It is a member of the Lower Centaurus Crux group of the Scorpius–Centaurus association. [2]
The stellar classification of this object is B2 IV/V, [2] matching a massive B-type star with a luminosity class displaying mixed traits of a main sequence and a subgiant star. It is 13 [5] million years old and is spinning with a projected rotational velocity of 124 km/s. [4] The star has 7.9 [5] times the mass of the Sun and 3.7 [6] times the Sun's radius. It is radiating 1,884 [2] times the luminosity of the Sun from its photosphere at an effective temperature of 21,411 K. [6]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 58m 40.75s [1] |
Declination | −44° 48′ 12.9″ [1] |
Apparent magnitude (V) | +3.87 [2] |
Characteristics | |
Spectral type | B2 IV/V [3] |
B−V color index | −0.208±0.011 [2] |
Astrometry | |
Radial velocity (Rv) | +9.2±1.4 [4] km/s |
Proper motion (μ) |
RA: −27.51±0.15
[1]
mas/
yr Dec.: −22.44±0.13 [1] mas/ yr |
Parallax (π) | 7.63 ± 0.16 mas [1] |
Distance | 427 ± 9
ly (131 ± 3 pc) |
Absolute magnitude (MV) | −1.72 [2] |
Details | |
Mass | 7.9±0.1 [5] M☉ |
Radius | 3.74±0.34 [6] R☉ |
Luminosity | 1,884 [2] L☉ |
Surface gravity (log g) | 4.15±0.07 [6] cgs |
Temperature | 21,411±377 [6] K |
Rotational velocity (v sin i) | 124 [4] km/s |
Age | 13.0±2.0 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Upsilon1 Centauri, Latinized from υ1 Centauri, is a single [8] star in the southern constellation of Centaurus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of +3.87. [2] The distance to this object is approximately 427 light years based on parallax, [1] and is receding with a radial velocity of +9 km/s. [4] It is a member of the Lower Centaurus Crux group of the Scorpius–Centaurus association. [2]
The stellar classification of this object is B2 IV/V, [2] matching a massive B-type star with a luminosity class displaying mixed traits of a main sequence and a subgiant star. It is 13 [5] million years old and is spinning with a projected rotational velocity of 124 km/s. [4] The star has 7.9 [5] times the mass of the Sun and 3.7 [6] times the Sun's radius. It is radiating 1,884 [2] times the luminosity of the Sun from its photosphere at an effective temperature of 21,411 K. [6]