Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Equuleus |
Right ascension | 21h 22m 53.61365s [1] |
Declination | +06° 48′ 40.1125″ [1] |
Apparent magnitude (V) | 5.16 [2] |
Characteristics | |
Evolutionary stage | Main sequence [3] |
Spectral type | A3 V [4] |
U−B color index | +0.10 [5] |
B−V color index | +0.064±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −11.1±0.8 [6] km/s |
Proper motion (μ) |
RA: +53.685
[1]
mas/
yr Dec.: +10.136 [1] mas/ yr |
Parallax (π) | 11.2696 ± 0.2608 mas [1] |
Distance | 289 ± 7
ly (89 ± 2 pc) |
Absolute magnitude (MV) | +0.13 [2] |
Details | |
Mass | 2.74±0.04 [3] M☉ |
Radius | 4.02 [7] R☉ |
Luminosity | 78.3 [2] L☉ |
Temperature | 9,000 [7] K |
Rotational velocity (v sin i) | 58.0±0.7 [4] km/s |
Age | 600 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Beta Equulei, Latinized from β Equulei, is the Bayer designation for a solitary [9] star in the northern constellation of Equuleus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.16. [2] The annual parallax shift is 11.27 mas, [1] indicating a separation of around 289 light years from the Sun. It is drifting closer with a radial velocity of −11 km/s. [6]
This is an ordinary A-type main sequence star with a stellar classification of A3 V. [4] It has 2.7 times the mass of the Sun [3] and about four [7] times the Sun's radius. The star is around 600 [7] million years old – 93% [3] of the way through its main sequence lifetime – and is spinning with a projected rotational velocity of 58 km/s. [4] It is radiating 78 [2] times the luminosity of the Sun from its photosphere at an effective temperature of about 9,000 K. [7] The star emits an infrared excess indicating the presence of a dusty debris disk. The mean temperature of the dust is 85 K, indicating the semimajor axis of its orbit is 104 AU. [7]
β Equulei has four optical companions. They are not physically associated with the star described above. [10]
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cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Equuleus |
Right ascension | 21h 22m 53.61365s [1] |
Declination | +06° 48′ 40.1125″ [1] |
Apparent magnitude (V) | 5.16 [2] |
Characteristics | |
Evolutionary stage | Main sequence [3] |
Spectral type | A3 V [4] |
U−B color index | +0.10 [5] |
B−V color index | +0.064±0.003 [2] |
Astrometry | |
Radial velocity (Rv) | −11.1±0.8 [6] km/s |
Proper motion (μ) |
RA: +53.685
[1]
mas/
yr Dec.: +10.136 [1] mas/ yr |
Parallax (π) | 11.2696 ± 0.2608 mas [1] |
Distance | 289 ± 7
ly (89 ± 2 pc) |
Absolute magnitude (MV) | +0.13 [2] |
Details | |
Mass | 2.74±0.04 [3] M☉ |
Radius | 4.02 [7] R☉ |
Luminosity | 78.3 [2] L☉ |
Temperature | 9,000 [7] K |
Rotational velocity (v sin i) | 58.0±0.7 [4] km/s |
Age | 600 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Beta Equulei, Latinized from β Equulei, is the Bayer designation for a solitary [9] star in the northern constellation of Equuleus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.16. [2] The annual parallax shift is 11.27 mas, [1] indicating a separation of around 289 light years from the Sun. It is drifting closer with a radial velocity of −11 km/s. [6]
This is an ordinary A-type main sequence star with a stellar classification of A3 V. [4] It has 2.7 times the mass of the Sun [3] and about four [7] times the Sun's radius. The star is around 600 [7] million years old – 93% [3] of the way through its main sequence lifetime – and is spinning with a projected rotational velocity of 58 km/s. [4] It is radiating 78 [2] times the luminosity of the Sun from its photosphere at an effective temperature of about 9,000 K. [7] The star emits an infrared excess indicating the presence of a dusty debris disk. The mean temperature of the dust is 85 K, indicating the semimajor axis of its orbit is 104 AU. [7]
β Equulei has four optical companions. They are not physically associated with the star described above. [10]
{{
cite web}}
: CS1 maint: postscript (
link)