Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Vulpecula |
Right ascension | 20h 22m 03.43076s [1] |
Declination | +24° 26′ 45.9526″ [1] |
Apparent magnitude (V) | 5.50 [2] |
Characteristics | |
Spectral type | B6 IVe [3] [4] |
B−V color index | −0.09±0.02 [4] |
Astrometry | |
Radial velocity (Rv) | −11.0±3.6 [5] km/s |
Proper motion (μ) |
RA: +0.605
[1]
mas/
yr Dec.: −5.732 [1] mas/ yr |
Parallax (π) | 2.7932 ± 0.1493 mas [1] |
Distance | 1,170 ± 60
ly (360 ± 20 pc) |
Absolute magnitude (MV) | −1.88 [4] |
Details | |
Mass | 7±1 [6] M☉ |
Radius | 11±1 [6] R☉ |
Luminosity (bolometric) | 1,345+215 −184 [7] L☉ |
Surface gravity (log g) | 3.52±0.21 [7] cgs |
Temperature | 13,170±330 [7] K |
Rotational velocity (v sin i) | 160±14 [7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
25 Vulpeculae is a single [2] star in the northern constellation of Vulpecula, located roughly 1,170 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.50 [2] This object is moving closer to the Earth with a heliocentric radial velocity of −11 km/s. [5]
This is a Be star with a stellar classification of B6 IVe, [3] matching the spectrum of an aging subgiant with a circumstellar disk of ionized gas. Cowley (1972) had it rated as a more evolved giant star with a class of B8 IIIn, [9] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin, showing a projected rotational velocity of 160 km/s. [7] The star has 7 times the mass of the Sun and 11 times the Sun's radius. [6] It is radiating 1,345 times the luminosity of the Sun from its photosphere at an effective temperature of 13,170 K. [7]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Vulpecula |
Right ascension | 20h 22m 03.43076s [1] |
Declination | +24° 26′ 45.9526″ [1] |
Apparent magnitude (V) | 5.50 [2] |
Characteristics | |
Spectral type | B6 IVe [3] [4] |
B−V color index | −0.09±0.02 [4] |
Astrometry | |
Radial velocity (Rv) | −11.0±3.6 [5] km/s |
Proper motion (μ) |
RA: +0.605
[1]
mas/
yr Dec.: −5.732 [1] mas/ yr |
Parallax (π) | 2.7932 ± 0.1493 mas [1] |
Distance | 1,170 ± 60
ly (360 ± 20 pc) |
Absolute magnitude (MV) | −1.88 [4] |
Details | |
Mass | 7±1 [6] M☉ |
Radius | 11±1 [6] R☉ |
Luminosity (bolometric) | 1,345+215 −184 [7] L☉ |
Surface gravity (log g) | 3.52±0.21 [7] cgs |
Temperature | 13,170±330 [7] K |
Rotational velocity (v sin i) | 160±14 [7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
25 Vulpeculae is a single [2] star in the northern constellation of Vulpecula, located roughly 1,170 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.50 [2] This object is moving closer to the Earth with a heliocentric radial velocity of −11 km/s. [5]
This is a Be star with a stellar classification of B6 IVe, [3] matching the spectrum of an aging subgiant with a circumstellar disk of ionized gas. Cowley (1972) had it rated as a more evolved giant star with a class of B8 IIIn, [9] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin, showing a projected rotational velocity of 160 km/s. [7] The star has 7 times the mass of the Sun and 11 times the Sun's radius. [6] It is radiating 1,345 times the luminosity of the Sun from its photosphere at an effective temperature of 13,170 K. [7]