Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Serpens |
Right ascension | 15h 32m 57.93765s [1] |
Declination | −01° 11′ 11.0412″ [1] |
Apparent magnitude (V) | 5.497 [2] |
Characteristics | |
Evolutionary stage | horizontal branch [2] |
Spectral type | K0 III [3] |
B−V color index | 1.092 [2] |
Astrometry | |
Radial velocity (Rv) | −16.1±2.8 [4] km/s |
Proper motion (μ) |
RA: −17.765
[1]
mas/
yr Dec.: −42.217 [1] mas/ yr |
Parallax (π) | 12.0563 ± 0.1290 mas [1] |
Distance | 271 ± 3
ly (82.9 ± 0.9 pc) |
Absolute magnitude (MV) | 0.83 [5] |
Details | |
Mass | 1.27±0.35 [6] M☉ |
Radius | 11 [7] R☉ |
Luminosity | 50 [7] L☉ |
Surface gravity (log g) | 2.48±0.11 [6] cgs |
Temperature | 4,767±92 [6] K |
Metallicity [Fe/H] | −0.13 [7] dex |
Age | 2.75+0.88 −0.66 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
11 Serpentis is a single [9] star in the constellation of Serpens, located 271 light years away from the Sun. It has the Bayer designation A1 Serpentis, [10] 11 Serpentis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.497. [2] It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s. [4]
This is an aging giant star with a stellar classification of K0 III, [3] a star that has used up its core hydrogen and has expanded. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core. [2] 11 Serpentis is 2.75 billion years old with 1.3 [6] times the mass of the Sun and has 11 [7] times the Sun's radius. It is radiating 50 [7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,767 K. [6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Serpens |
Right ascension | 15h 32m 57.93765s [1] |
Declination | −01° 11′ 11.0412″ [1] |
Apparent magnitude (V) | 5.497 [2] |
Characteristics | |
Evolutionary stage | horizontal branch [2] |
Spectral type | K0 III [3] |
B−V color index | 1.092 [2] |
Astrometry | |
Radial velocity (Rv) | −16.1±2.8 [4] km/s |
Proper motion (μ) |
RA: −17.765
[1]
mas/
yr Dec.: −42.217 [1] mas/ yr |
Parallax (π) | 12.0563 ± 0.1290 mas [1] |
Distance | 271 ± 3
ly (82.9 ± 0.9 pc) |
Absolute magnitude (MV) | 0.83 [5] |
Details | |
Mass | 1.27±0.35 [6] M☉ |
Radius | 11 [7] R☉ |
Luminosity | 50 [7] L☉ |
Surface gravity (log g) | 2.48±0.11 [6] cgs |
Temperature | 4,767±92 [6] K |
Metallicity [Fe/H] | −0.13 [7] dex |
Age | 2.75+0.88 −0.66 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
11 Serpentis is a single [9] star in the constellation of Serpens, located 271 light years away from the Sun. It has the Bayer designation A1 Serpentis, [10] 11 Serpentis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.497. [2] It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s. [4]
This is an aging giant star with a stellar classification of K0 III, [3] a star that has used up its core hydrogen and has expanded. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core. [2] 11 Serpentis is 2.75 billion years old with 1.3 [6] times the mass of the Sun and has 11 [7] times the Sun's radius. It is radiating 50 [7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,767 K. [6]