Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 29m 23.73561s[1] |
Declination | +30° 22′ 06.7968″[1] |
Apparent magnitude (V) | 4.02[2] |
Characteristics | |
Evolutionary stage | supergiant[3] |
Spectral type | F5Ib-II[3] |
B−V color index | +0.38[2] |
Variable type | constant[3] |
Astrometry | |
Radial velocity (Rv) | −18.20[4] km/s |
Proper motion (μ) | RA: 6.89[1] mas/yr Dec.: −0.87[1] mas/yr |
Parallax (π) | 4.24 ± 0.16 mas[1] |
Distance | 770 ± 30 ly (236 ± 9 pc) |
Absolute magnitude (MV) | −3.32[5] |
Details | |
Mass | 5.3±0.4[6] M☉ |
Radius | 27.01+2.51 −1.01[7] R☉ |
Luminosity | 1,197±90[7] L☉ |
Surface gravity (log g) | 2.32±0.08[6] cgs |
Temperature | 6533+126 −283[7] K |
Metallicity [Fe/H] | 0.00±0.07[6] dex |
Rotational velocity (v sin i) | 9.5±2.0[3] km/s |
Age | 85[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
41 Cygni is a single[9] star in the northern constellation of Cygnus, located near the southern border with Vulpecula. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.02.[2] The star lies at a distance of around 770 light years from the Sun, based on parallax, and is drifting closer with a radial velocity of −18 km/s.[4]
This is a sharp-lined supergiant star[10] with a stellar classification of F5Ib-II.[3] It is 85[6] million years old with 5.3[6] times the mass of the Sun and is spinning with a projected rotational velocity of 9.5 km/s.[3] Having exhausted the supply of hydrogen at its core, the star has expanded to 27[7] times the Sun's radius. It is radiating about 1,200[7] times the Sun's luminosity from its swollen photosphere at an effective temperature of 6,533 K.[7]
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