![]() A light curve for V806 Centauri. The main plot shows the long term variability from Hipparcos data, [1] and the inset plot shows the variability over the 26.5 day period, using data from Tabur et al. (2009). [2] The green curve shows the best-fit sine wave, which has an amplitude of 18 millimagnitudes. | |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 49m 26.72175s [3] |
Declination | −34° 27′ 02.7929″ [3] |
Apparent magnitude (V) | 4.19 [4] (4.16–4.26) [5] |
Characteristics | |
Spectral type | M5 III [6] |
U−B color index | +1.44 [7] |
B−V color index | +1.49 [7] |
Variable type | SRb [5] |
Astrometry | |
Radial velocity (Rv) | +40.7±0.7 [8] km/s |
Proper motion (μ) |
RA: −41.68±0.23
[3]
mas/
yr Dec.: −59.77±0.18 [3] mas/ yr |
Parallax (π) | 17.82 ± 0.21 mas [3] |
Distance | 183 ± 2
ly (56.1 ± 0.7 pc) |
Absolute magnitude (MV) | +0.51 [9] |
Details | |
Radius | 70 [10] R☉ |
Luminosity | 71.96 [4] L☉ |
Temperature | 3,398 [11] K |
Other designations | |
Database references | |
SIMBAD | data |
2 Centauri is a single [13] star in the southern constellation of Centaurus, located approximately 183 light-years from Earth. [3] It has the Bayer designation g Centauri; [12] 2 Centauri is the Flamsteed designation. This object is visible to the naked eye as faint, red-hued star with an apparent visual magnitude of 4.19. [4] It is moving away from the Earth with a heliocentric radial velocity of +41 km/s. [8] The star is a member of the HR 1614 supercluster. [14]
This is an evolved red giant star with a stellar classification of M5 III. [6] It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26 [5] with a period of 12.57 days. [15] The star has around 70 [10] times the Sun's radius and is radiating 72 [4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,398 K. [11]
![]() A light curve for V806 Centauri. The main plot shows the long term variability from Hipparcos data, [1] and the inset plot shows the variability over the 26.5 day period, using data from Tabur et al. (2009). [2] The green curve shows the best-fit sine wave, which has an amplitude of 18 millimagnitudes. | |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 49m 26.72175s [3] |
Declination | −34° 27′ 02.7929″ [3] |
Apparent magnitude (V) | 4.19 [4] (4.16–4.26) [5] |
Characteristics | |
Spectral type | M5 III [6] |
U−B color index | +1.44 [7] |
B−V color index | +1.49 [7] |
Variable type | SRb [5] |
Astrometry | |
Radial velocity (Rv) | +40.7±0.7 [8] km/s |
Proper motion (μ) |
RA: −41.68±0.23
[3]
mas/
yr Dec.: −59.77±0.18 [3] mas/ yr |
Parallax (π) | 17.82 ± 0.21 mas [3] |
Distance | 183 ± 2
ly (56.1 ± 0.7 pc) |
Absolute magnitude (MV) | +0.51 [9] |
Details | |
Radius | 70 [10] R☉ |
Luminosity | 71.96 [4] L☉ |
Temperature | 3,398 [11] K |
Other designations | |
Database references | |
SIMBAD | data |
2 Centauri is a single [13] star in the southern constellation of Centaurus, located approximately 183 light-years from Earth. [3] It has the Bayer designation g Centauri; [12] 2 Centauri is the Flamsteed designation. This object is visible to the naked eye as faint, red-hued star with an apparent visual magnitude of 4.19. [4] It is moving away from the Earth with a heliocentric radial velocity of +41 km/s. [8] The star is a member of the HR 1614 supercluster. [14]
This is an evolved red giant star with a stellar classification of M5 III. [6] It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26 [5] with a period of 12.57 days. [15] The star has around 70 [10] times the Sun's radius and is radiating 72 [4] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,398 K. [11]