Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 19m 29.2960s [1] |
Declination | +13° 13′ 00.3571″ [1] |
Apparent magnitude (V) | 6.21 [2] |
Characteristics | |
Evolutionary stage | AGB [3] |
Spectral type | M1 III [4] |
B−V color index | +1.63 [2] |
Astrometry | |
Radial velocity (Rv) | 22.68±0.13 [5] km/s |
Proper motion (μ) |
RA: −15.865
mas/
yr
[1] Dec.: −18.581 mas/ yr [1] |
Parallax (π) | 3.8556 ± 0.0442 mas [1] |
Distance | 846 ± 10
ly (259 ± 3 pc) |
Absolute magnitude (MV) | −0.46 [6] |
Details | |
Mass | 1.77 [7] M☉ |
Radius | 57.5 [8] R☉ |
Luminosity | 592±16 [9] L☉ |
Surface gravity (log g) | 0.89 [10] cgs |
Temperature | 3,884±122 [8] K |
Metallicity [Fe/H] | +0.08 [10] dex |
Other designations | |
Database references | |
SIMBAD | data |
HD 193373 (HR 7771) is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21, [2] placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant [1] and it is currently receding with a heliocentric radial velocity of 22.7 km/s. [5]
This is an asymptotic giant branch star [3] with a stellar classification of M1 III. [4] In its current state, the object is fusing hydrogen and helium shells around an inert carbon core. HR 7771 has 177% the mass of the Sun [7] but has expanded to an enlarged radius of 57.5 R☉. [8] It radiates at 592 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 3,884 K, [8] giving a red hue. HD 193373 has an iron abundance 120% that of the Sun, making it slightly metal enriched. [10]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 19m 29.2960s [1] |
Declination | +13° 13′ 00.3571″ [1] |
Apparent magnitude (V) | 6.21 [2] |
Characteristics | |
Evolutionary stage | AGB [3] |
Spectral type | M1 III [4] |
B−V color index | +1.63 [2] |
Astrometry | |
Radial velocity (Rv) | 22.68±0.13 [5] km/s |
Proper motion (μ) |
RA: −15.865
mas/
yr
[1] Dec.: −18.581 mas/ yr [1] |
Parallax (π) | 3.8556 ± 0.0442 mas [1] |
Distance | 846 ± 10
ly (259 ± 3 pc) |
Absolute magnitude (MV) | −0.46 [6] |
Details | |
Mass | 1.77 [7] M☉ |
Radius | 57.5 [8] R☉ |
Luminosity | 592±16 [9] L☉ |
Surface gravity (log g) | 0.89 [10] cgs |
Temperature | 3,884±122 [8] K |
Metallicity [Fe/H] | +0.08 [10] dex |
Other designations | |
Database references | |
SIMBAD | data |
HD 193373 (HR 7771) is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21, [2] placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant [1] and it is currently receding with a heliocentric radial velocity of 22.7 km/s. [5]
This is an asymptotic giant branch star [3] with a stellar classification of M1 III. [4] In its current state, the object is fusing hydrogen and helium shells around an inert carbon core. HR 7771 has 177% the mass of the Sun [7] but has expanded to an enlarged radius of 57.5 R☉. [8] It radiates at 592 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 3,884 K, [8] giving a red hue. HD 193373 has an iron abundance 120% that of the Sun, making it slightly metal enriched. [10]