Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 24m 07.57863s [1] |
Declination | +29° 37′ 16.7934″ [1] |
Apparent magnitude (V) | 4.976 [2] |
Characteristics | |
Spectral type | B3 IV [3] |
B−V color index | −0.117 [2] |
Astrometry | |
Radial velocity (Rv) | −23.60±2.0 [4] km/s |
Proper motion (μ) |
RA: +12.022
[1]
mas/
yr Dec.: +12.173 [1] mas/ yr |
Parallax (π) | 3.5657 ± 0.1692 mas [1] |
Distance | 910 ± 40
ly (280 ± 10 pc) |
Absolute magnitude (MV) | −2.06 [4] |
Details | |
Mass | 7.0±0.1 [5] M☉ |
Radius | 5.6 [6] R☉ |
Luminosity (bolometric) | 3,354 [2] L☉ |
Surface gravity (log g) | 3.653±0.035 [7] cgs |
Temperature | 16,479±219 [7] K |
Metallicity [Fe/H] | +0.03±0.05 [8] dex |
Rotational velocity (v sin i) | 137±8 [7] km/s |
Age | 36.6±0.5 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
2 Cygni is a blue-white hued star in the northern constellation of Cygnus, located a few degrees from Albireo. It is a probable astrometric binary; [10] the visible component can be viewed with the naked eye, having an apparent visual magnitude of 4.976. [2] Based upon an annual parallax shift of 3.6 mas, [1] it is located roughly 910 light years from Earth. It has a peculiar velocity of 23 km/s and may be a runaway star [5] system.
The stellar classification of the primary is B3 IV, [3] matching a B-type subgiant star. It has seven [5] times the mass of the Sun and about 5.6 [6] times the Sun's radius. The star is 37 [5] million years old with a high rate of spin; it has a projected rotational velocity of 137 km/s. [7] It is radiating 3,354 [2] times the Sun's luminosity from its photosphere at an effective temperature of 16,479 K. [7]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 24m 07.57863s [1] |
Declination | +29° 37′ 16.7934″ [1] |
Apparent magnitude (V) | 4.976 [2] |
Characteristics | |
Spectral type | B3 IV [3] |
B−V color index | −0.117 [2] |
Astrometry | |
Radial velocity (Rv) | −23.60±2.0 [4] km/s |
Proper motion (μ) |
RA: +12.022
[1]
mas/
yr Dec.: +12.173 [1] mas/ yr |
Parallax (π) | 3.5657 ± 0.1692 mas [1] |
Distance | 910 ± 40
ly (280 ± 10 pc) |
Absolute magnitude (MV) | −2.06 [4] |
Details | |
Mass | 7.0±0.1 [5] M☉ |
Radius | 5.6 [6] R☉ |
Luminosity (bolometric) | 3,354 [2] L☉ |
Surface gravity (log g) | 3.653±0.035 [7] cgs |
Temperature | 16,479±219 [7] K |
Metallicity [Fe/H] | +0.03±0.05 [8] dex |
Rotational velocity (v sin i) | 137±8 [7] km/s |
Age | 36.6±0.5 [5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
2 Cygni is a blue-white hued star in the northern constellation of Cygnus, located a few degrees from Albireo. It is a probable astrometric binary; [10] the visible component can be viewed with the naked eye, having an apparent visual magnitude of 4.976. [2] Based upon an annual parallax shift of 3.6 mas, [1] it is located roughly 910 light years from Earth. It has a peculiar velocity of 23 km/s and may be a runaway star [5] system.
The stellar classification of the primary is B3 IV, [3] matching a B-type subgiant star. It has seven [5] times the mass of the Sun and about 5.6 [6] times the Sun's radius. The star is 37 [5] million years old with a high rate of spin; it has a projected rotational velocity of 137 km/s. [7] It is radiating 3,354 [2] times the Sun's luminosity from its photosphere at an effective temperature of 16,479 K. [7]