Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 55m 52.322s [1] |
Declination | −59° 22′ 16.45″ [1] |
Apparent magnitude (V) | 7.86 [2] |
Characteristics | |
Spectral type | B1 Ib [3] |
Apparent magnitude (U) | 7.34 |
Apparent magnitude (B) | 8.00 |
Apparent magnitude (V) | 7.86 |
Apparent magnitude (R) | 8.88 |
Apparent magnitude (G) | 7.7591 |
Apparent magnitude (J) | 7.428 |
Apparent magnitude (H) | 7.426 |
Apparent magnitude (K) | 7.385 |
Astrometry | |
Proper motion (μ) |
RA: −3.376
[1]
mas/
yr Dec.: −1.300 [1] mas/ yr |
Parallax (π) | 0.5846 ± 0.0260 mas [1] |
Distance | 5,600 ± 200
ly (1,710 ± 80 pc) |
Absolute magnitude (MV) | −5.32 [4] |
Details | |
Mass | 7.0 [5] M☉ |
Radius | 19.6 [6] R☉ |
Luminosity | 4,124 [7] L☉ |
Surface gravity (log g) | 2.14 [7] cgs |
Temperature | 26,424 [8] K |
Age | 31.6 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 121228 is a blue supergiant star located in the constellation Centaurus. The star is noted for its close visual proximity to the planetary nebula SuWt 2. [9]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Centaurus |
Right ascension | 13h 55m 52.322s [1] |
Declination | −59° 22′ 16.45″ [1] |
Apparent magnitude (V) | 7.86 [2] |
Characteristics | |
Spectral type | B1 Ib [3] |
Apparent magnitude (U) | 7.34 |
Apparent magnitude (B) | 8.00 |
Apparent magnitude (V) | 7.86 |
Apparent magnitude (R) | 8.88 |
Apparent magnitude (G) | 7.7591 |
Apparent magnitude (J) | 7.428 |
Apparent magnitude (H) | 7.426 |
Apparent magnitude (K) | 7.385 |
Astrometry | |
Proper motion (μ) |
RA: −3.376
[1]
mas/
yr Dec.: −1.300 [1] mas/ yr |
Parallax (π) | 0.5846 ± 0.0260 mas [1] |
Distance | 5,600 ± 200
ly (1,710 ± 80 pc) |
Absolute magnitude (MV) | −5.32 [4] |
Details | |
Mass | 7.0 [5] M☉ |
Radius | 19.6 [6] R☉ |
Luminosity | 4,124 [7] L☉ |
Surface gravity (log g) | 2.14 [7] cgs |
Temperature | 26,424 [8] K |
Age | 31.6 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 121228 is a blue supergiant star located in the constellation Centaurus. The star is noted for its close visual proximity to the planetary nebula SuWt 2. [9]