Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 41m 16.2079s [1] |
Declination | +14° 34′ 58.3606″ [1] |
Apparent magnitude (V) | 6.00±0.01 [2] |
Characteristics | |
Spectral type | K4 III [3] |
U−B color index | +1.44 [4] |
B−V color index | +1.24 [5] |
Astrometry | |
Radial velocity (Rv) | −32±2 [6] km/s |
Proper motion (μ) |
RA: −9.462
mas/
yr
[1] Dec.: −0.344 mas/ yr [1] |
Parallax (π) | 6.6178 ± 0.0397 mas [1] |
Distance | 493 ± 3
ly (151.1 ± 0.9 pc) |
Absolute magnitude (MV) | +0.06 [7] |
Details | |
Mass | 2.42±0.71 [8] M☉ |
Radius | 18.47+1.02 −1.03 [9] R☉ |
Luminosity | 125±2 [9] L☉ |
Surface gravity (log g) | 2.27 [10] cgs |
Temperature | 4,378 [10] K |
Metallicity [Fe/H] | 0.00 [10] dex |
Age | 794±33 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
10 Delphini (10 Del) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.00, allowing it to be faintly seen with the naked eye. Parallax measurements put the object at a distance of 493 light years but is drifting closer with a heliocentric radial velocity of −32 km/s.
10 Delphini has a stellar classification of K4 III [3] or K2 III, [11] both indicating that it is a red giant. However, there is some uncertainty behind the first classification. It has twice the mass of the Sun [8] but at an age of 794 million years [8] — expanded to 18 times the radius of the Sun. [9] It shines at 125 L☉ [9] from its enlarged photosphere at an effective temperature of 4,378 K, [10] giving it an orange glow. 10 Del has a solar metallicity. [10]
10 Del has been suspected to be a variable star, although it hasn't been catalogued as such in the GCVS. [12]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 41m 16.2079s [1] |
Declination | +14° 34′ 58.3606″ [1] |
Apparent magnitude (V) | 6.00±0.01 [2] |
Characteristics | |
Spectral type | K4 III [3] |
U−B color index | +1.44 [4] |
B−V color index | +1.24 [5] |
Astrometry | |
Radial velocity (Rv) | −32±2 [6] km/s |
Proper motion (μ) |
RA: −9.462
mas/
yr
[1] Dec.: −0.344 mas/ yr [1] |
Parallax (π) | 6.6178 ± 0.0397 mas [1] |
Distance | 493 ± 3
ly (151.1 ± 0.9 pc) |
Absolute magnitude (MV) | +0.06 [7] |
Details | |
Mass | 2.42±0.71 [8] M☉ |
Radius | 18.47+1.02 −1.03 [9] R☉ |
Luminosity | 125±2 [9] L☉ |
Surface gravity (log g) | 2.27 [10] cgs |
Temperature | 4,378 [10] K |
Metallicity [Fe/H] | 0.00 [10] dex |
Age | 794±33 [8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
10 Delphini (10 Del) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.00, allowing it to be faintly seen with the naked eye. Parallax measurements put the object at a distance of 493 light years but is drifting closer with a heliocentric radial velocity of −32 km/s.
10 Delphini has a stellar classification of K4 III [3] or K2 III, [11] both indicating that it is a red giant. However, there is some uncertainty behind the first classification. It has twice the mass of the Sun [8] but at an age of 794 million years [8] — expanded to 18 times the radius of the Sun. [9] It shines at 125 L☉ [9] from its enlarged photosphere at an effective temperature of 4,378 K, [10] giving it an orange glow. 10 Del has a solar metallicity. [10]
10 Del has been suspected to be a variable star, although it hasn't been catalogued as such in the GCVS. [12]