Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Draco |
Right ascension | 20h 02m 49.07268s [1] |
Declination | +67° 52′ 24.8294″ [1] |
Apparent magnitude (V) | 4.52 [2] |
Characteristics | |
Spectral type | K3 III [3] |
U−B color index | +1.54 [2] |
B−V color index | +1.34 [2] |
Astrometry | |
Radial velocity (Rv) | −9.80±0.43 [4] km/s |
Proper motion (μ) |
RA: +16.44
[1]
mas/
yr Dec.: +47.31 [1] mas/ yr |
Parallax (π) | 7.61 ± 0.17 mas [1] |
Distance | 429 ± 10
ly (131 ± 3 pc) |
Absolute magnitude (MV) | −0.97 [5] |
Details | |
Radius | 28 [3] R☉ |
Luminosity | 402 [6] L☉ |
Surface gravity (log g) | 1.90 [7] cgs |
Temperature | 4370 [7] K |
Metallicity [Fe/H] | 0.03 [7] dex |
Rotational velocity (v sin i) | 10 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Rho Draconis (ρ Draconis) is a solitary [10] star in the northern circumpolar constellation of Draco. It is faintly visible to the naked eye with an apparent visual magnitude of 4.52. [2] Based upon an annual parallax shift of 7.61 mas as measured from Earth, [1] it is located around 429 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.027 due to interstellar dust. [5]
With a stellar classification of K3 III, [3] Rho Draconis is a normal giant star that is past the first dredge-up phase of its post- main sequence evolution. [7] It has the peculiar spectrum of a CN star, showing abnormal line strengths for cyanogen and calcium. [11] The star has expanded to around 28 [3] times the Sun's radius and it is radiating 402 [6] times the solar luminosity from its photosphere at an effective temperature of 4,370 K. [7]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Draco |
Right ascension | 20h 02m 49.07268s [1] |
Declination | +67° 52′ 24.8294″ [1] |
Apparent magnitude (V) | 4.52 [2] |
Characteristics | |
Spectral type | K3 III [3] |
U−B color index | +1.54 [2] |
B−V color index | +1.34 [2] |
Astrometry | |
Radial velocity (Rv) | −9.80±0.43 [4] km/s |
Proper motion (μ) |
RA: +16.44
[1]
mas/
yr Dec.: +47.31 [1] mas/ yr |
Parallax (π) | 7.61 ± 0.17 mas [1] |
Distance | 429 ± 10
ly (131 ± 3 pc) |
Absolute magnitude (MV) | −0.97 [5] |
Details | |
Radius | 28 [3] R☉ |
Luminosity | 402 [6] L☉ |
Surface gravity (log g) | 1.90 [7] cgs |
Temperature | 4370 [7] K |
Metallicity [Fe/H] | 0.03 [7] dex |
Rotational velocity (v sin i) | 10 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Rho Draconis (ρ Draconis) is a solitary [10] star in the northern circumpolar constellation of Draco. It is faintly visible to the naked eye with an apparent visual magnitude of 4.52. [2] Based upon an annual parallax shift of 7.61 mas as measured from Earth, [1] it is located around 429 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.027 due to interstellar dust. [5]
With a stellar classification of K3 III, [3] Rho Draconis is a normal giant star that is past the first dredge-up phase of its post- main sequence evolution. [7] It has the peculiar spectrum of a CN star, showing abnormal line strengths for cyanogen and calcium. [11] The star has expanded to around 28 [3] times the Sun's radius and it is radiating 402 [6] times the solar luminosity from its photosphere at an effective temperature of 4,370 K. [7]