Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 07h 22m 13.52901s [1] |
Declination | −19° 00′ 59.7646″ [1] |
Apparent magnitude (V) | 4.94 [2] |
Characteristics | |
Evolutionary stage | Main sequence [3] |
Spectral type | B5 II/III [4] or B7 IV [5] |
B−V color index | −0.039±0.024 [2] |
Astrometry | |
Radial velocity (Rv) | +32.9±1.6 [2] km/s |
Proper motion (μ) |
RA: −1.69
[1]
mas/
yr Dec.: +6.91 [1] mas/ yr |
Parallax (π) | 6.78 ± 0.26 mas [1] |
Distance | 480 ± 20
ly (147 ± 6 pc) |
Absolute magnitude (MV) | −0.90 [2] |
Details | |
Mass | 4.12±0.08 [3] M☉ |
Radius | 4.7 [6] R☉ |
Luminosity | 489+43 −40 [3] L☉ |
Temperature | 12,445±86 [3] K |
Rotational velocity (v sin i) | 116 [3] km/s |
Age | 291 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 57821 is a single [9] star in the southern constellation of Canis Major. It has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.94. [2] Based on parallax measurements, the distance to this object is approximately 480 light years. It is drifting further away with a radial velocity of +33 km/s, having come to within 71 light-years some 4.3 million years ago. [2]
The stellar classification of this star is B5 II/III, [4] which matches the spectrum of a giant/ bright giant although stellar models suggest it may still be on the main sequence. [3] It has over four [3] times the mass of the Sun and is 291 [7] million years old. The star has a high rate of spin, showing a projected rotational velocity of 116 km/s. [3] It is radiating around 489 [3] times the luminosity of the Sun from its photosphere at an effective temperature of 12,445 K. [3]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 07h 22m 13.52901s [1] |
Declination | −19° 00′ 59.7646″ [1] |
Apparent magnitude (V) | 4.94 [2] |
Characteristics | |
Evolutionary stage | Main sequence [3] |
Spectral type | B5 II/III [4] or B7 IV [5] |
B−V color index | −0.039±0.024 [2] |
Astrometry | |
Radial velocity (Rv) | +32.9±1.6 [2] km/s |
Proper motion (μ) |
RA: −1.69
[1]
mas/
yr Dec.: +6.91 [1] mas/ yr |
Parallax (π) | 6.78 ± 0.26 mas [1] |
Distance | 480 ± 20
ly (147 ± 6 pc) |
Absolute magnitude (MV) | −0.90 [2] |
Details | |
Mass | 4.12±0.08 [3] M☉ |
Radius | 4.7 [6] R☉ |
Luminosity | 489+43 −40 [3] L☉ |
Temperature | 12,445±86 [3] K |
Rotational velocity (v sin i) | 116 [3] km/s |
Age | 291 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 57821 is a single [9] star in the southern constellation of Canis Major. It has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.94. [2] Based on parallax measurements, the distance to this object is approximately 480 light years. It is drifting further away with a radial velocity of +33 km/s, having come to within 71 light-years some 4.3 million years ago. [2]
The stellar classification of this star is B5 II/III, [4] which matches the spectrum of a giant/ bright giant although stellar models suggest it may still be on the main sequence. [3] It has over four [3] times the mass of the Sun and is 291 [7] million years old. The star has a high rate of spin, showing a projected rotational velocity of 116 km/s. [3] It is radiating around 489 [3] times the luminosity of the Sun from its photosphere at an effective temperature of 12,445 K. [3]