Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 28m 16.7824s [1] |
Declination | +02° 56′ 14.0305″ [1] |
Apparent magnitude (V) | 6.19±0.01 [2] |
Characteristics | |
Spectral type | G8 III/IV [3] |
U−B color index | +0.56 [4] |
B−V color index | +0.90 [4] |
Astrometry | |
Radial velocity (Rv) | −28±0.4 [5] km/s |
Proper motion (μ) |
RA: +50.801
mas/
yr
[1] Dec.: −5.249 mas/ yr [1] |
Parallax (π) | 7.8706 ± 0.1437 mas [1] |
Distance | 414 ± 8
ly (127 ± 2 pc) |
Absolute magnitude (MV) | +0.74 [6] |
Details | |
Mass | 2.38 [7] M☉ |
Radius | 10.22 [8] R☉ |
Luminosity | 53.7 [9] L☉ |
Surface gravity (log g) | 2.88 [10] cgs |
Temperature | 5,101±122 [8] K |
Metallicity [Fe/H] | −0.11 [10] dex |
Rotational velocity (v sin i) | 2.4±1.2 [11] km/s |
Age | 640 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 194953 (HR 7824) is a solitary star in the equatorial constellation Delphinus. It is faintly visible to the naked eye with an apparent magnitude of 6.19 [2] and is located 414 light years away. [1] However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s. [5]
HD 194953 has a stellar classification of G8 III/IV [3] — a blended luminosity class of a subgiant and giant. It has 2.38 times the mass of the Sun [7] and an enlarged radius of 10.2 R☉ [8] at an age of 640 million years. [7] It radiates at 54 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 5,101 K, [8] giving a yellow hue. HD 194953 is slightly metal deficient with an iron abundance 78% that of the Sun [10] and spins leisurely with a projected rotational velocity of about 2.4 km/s. [11]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Delphinus |
Right ascension | 20h 28m 16.7824s [1] |
Declination | +02° 56′ 14.0305″ [1] |
Apparent magnitude (V) | 6.19±0.01 [2] |
Characteristics | |
Spectral type | G8 III/IV [3] |
U−B color index | +0.56 [4] |
B−V color index | +0.90 [4] |
Astrometry | |
Radial velocity (Rv) | −28±0.4 [5] km/s |
Proper motion (μ) |
RA: +50.801
mas/
yr
[1] Dec.: −5.249 mas/ yr [1] |
Parallax (π) | 7.8706 ± 0.1437 mas [1] |
Distance | 414 ± 8
ly (127 ± 2 pc) |
Absolute magnitude (MV) | +0.74 [6] |
Details | |
Mass | 2.38 [7] M☉ |
Radius | 10.22 [8] R☉ |
Luminosity | 53.7 [9] L☉ |
Surface gravity (log g) | 2.88 [10] cgs |
Temperature | 5,101±122 [8] K |
Metallicity [Fe/H] | −0.11 [10] dex |
Rotational velocity (v sin i) | 2.4±1.2 [11] km/s |
Age | 640 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 194953 (HR 7824) is a solitary star in the equatorial constellation Delphinus. It is faintly visible to the naked eye with an apparent magnitude of 6.19 [2] and is located 414 light years away. [1] However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s. [5]
HD 194953 has a stellar classification of G8 III/IV [3] — a blended luminosity class of a subgiant and giant. It has 2.38 times the mass of the Sun [7] and an enlarged radius of 10.2 R☉ [8] at an age of 640 million years. [7] It radiates at 54 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 5,101 K, [8] giving a yellow hue. HD 194953 is slightly metal deficient with an iron abundance 78% that of the Sun [10] and spins leisurely with a projected rotational velocity of about 2.4 km/s. [11]