Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 39m 23.1274s [1] |
Declination | +45° 40′ 00.9405″ [1] |
Apparent magnitude (V) | 6.61±0.01 [2] |
Characteristics | |
Spectral type | B5 IV [3] |
U−B color index | -0.59 [4] [2] |
B−V color index | −0.07 [2] |
Astrometry | |
Radial velocity (Rv) | −15±2 [5] km/s |
Proper motion (μ) |
RA: +3.737
mas/
yr
[1] Dec.: −1.586 mas/ yr [1] |
Parallax (π) | 2.4923 ± 0.0284 mas [1] |
Distance | 1,310 ± 10
ly (401 ± 5 pc) |
Absolute magnitude (MV) | −1.15 [6] |
Details | |
Mass | 4.21 [7] M☉ |
Radius | 5.17 [8] R☉ |
Luminosity | 379 [6] L☉ |
Surface gravity (log g) | 3.52 [7] cgs |
Temperature | 13,399 [9] K |
Metallicity [Fe/H] | −0.03 [7] dex |
Rotational velocity (v sin i) | 135 [10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 197036 is a single star in the northern constellation Cygnus. It has an absolute magnitude of −1.15 [6] and an apparent magnitude of 6.61, [2] below the max naked eye visibility. Located 1,310 light years away, it is approaching Earth with a heliocentric radial velocity of −15 km/s. [5]
HD 197036 is a bluish white subgiant star of the spectral type B5IV, and has an angular diameter of 0.12 mas. [11] This yields a radius of 5.17 R☉ [8] at its estimated distance. At present it has 4.21 times the mass of the Sun [7] and shines at 379 times the luminosity of the Sun [6] from its photosphere at an effective temperature of 13,399 K, [9] giving it a bluish white hue. Like many hot stars, it spins rapidly with a projected rotational velocity of 135 km/s−1 [10] and has a near solar metallicity. [7]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 39m 23.1274s [1] |
Declination | +45° 40′ 00.9405″ [1] |
Apparent magnitude (V) | 6.61±0.01 [2] |
Characteristics | |
Spectral type | B5 IV [3] |
U−B color index | -0.59 [4] [2] |
B−V color index | −0.07 [2] |
Astrometry | |
Radial velocity (Rv) | −15±2 [5] km/s |
Proper motion (μ) |
RA: +3.737
mas/
yr
[1] Dec.: −1.586 mas/ yr [1] |
Parallax (π) | 2.4923 ± 0.0284 mas [1] |
Distance | 1,310 ± 10
ly (401 ± 5 pc) |
Absolute magnitude (MV) | −1.15 [6] |
Details | |
Mass | 4.21 [7] M☉ |
Radius | 5.17 [8] R☉ |
Luminosity | 379 [6] L☉ |
Surface gravity (log g) | 3.52 [7] cgs |
Temperature | 13,399 [9] K |
Metallicity [Fe/H] | −0.03 [7] dex |
Rotational velocity (v sin i) | 135 [10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 197036 is a single star in the northern constellation Cygnus. It has an absolute magnitude of −1.15 [6] and an apparent magnitude of 6.61, [2] below the max naked eye visibility. Located 1,310 light years away, it is approaching Earth with a heliocentric radial velocity of −15 km/s. [5]
HD 197036 is a bluish white subgiant star of the spectral type B5IV, and has an angular diameter of 0.12 mas. [11] This yields a radius of 5.17 R☉ [8] at its estimated distance. At present it has 4.21 times the mass of the Sun [7] and shines at 379 times the luminosity of the Sun [6] from its photosphere at an effective temperature of 13,399 K, [9] giving it a bluish white hue. Like many hot stars, it spins rapidly with a projected rotational velocity of 135 km/s−1 [10] and has a near solar metallicity. [7]