Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 21h 33m 58.85298s [1] |
Declination | 45° 35′ 30.6179″ [1] |
Apparent magnitude (V) | 4.02 [2] |
Characteristics | |
Spectral type | G8 III Fe-0.5 [3] |
U−B color index | +0.56 [2] |
B−V color index | +0.89 [2] |
Astrometry | |
Radial velocity (Rv) | +6.88 [4] km/s |
Proper motion (μ) |
RA: −23.79
[1]
mas/
yr Dec.: −93.70 [1] mas/ yr |
Parallax (π) | 26.39 ± 0.15 mas [1] |
Distance | 123.6 ± 0.7
ly (37.9 ± 0.2 pc) |
Absolute magnitude (MV) | 1.11 [5] |
Details | |
Mass | 2.16 [6] M☉ |
Radius | 7.81 [6] R☉ |
Luminosity | 37.1 [6] L☉ |
Temperature | 5,100 [6] K |
Metallicity [Fe/H] | −0.05 [7] dex |
Rotational velocity (v sin i) | 0.71 [7] km/s |
Age | 660 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Rho Cygni, Latinized from ρ Cygni, is a yellow-hued star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent magnitude of 4.02. [2] The measured annual parallax shift is 26.39 milliarcseconds, [1] which yields a distance estimate of 124 light years. It is moving further from the Sun with a radial velocity of +6.88. [4] The star is a member of the thin disk population of the Milky Way galaxy. [7]
This is an evolved giant star of type G with an estimated age of 660 [7] million years and a stellar classification of G8 III Fe-0.5. [3] The suffix notation indicates the spectrum shows a mild underabundance of iron in the outer atmosphere. It has about 2.16 times the mass of the Sun and 7.81 times the Sun's girth. [6] The star is radiating 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,100 K. [6]
Rho Cygni is a bright X-ray source with a luminosity of 10.26×1029 ergs s−1. [8] It has a maximum magnetic field strength of 7.3±0.5 G [9] at the surface.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 21h 33m 58.85298s [1] |
Declination | 45° 35′ 30.6179″ [1] |
Apparent magnitude (V) | 4.02 [2] |
Characteristics | |
Spectral type | G8 III Fe-0.5 [3] |
U−B color index | +0.56 [2] |
B−V color index | +0.89 [2] |
Astrometry | |
Radial velocity (Rv) | +6.88 [4] km/s |
Proper motion (μ) |
RA: −23.79
[1]
mas/
yr Dec.: −93.70 [1] mas/ yr |
Parallax (π) | 26.39 ± 0.15 mas [1] |
Distance | 123.6 ± 0.7
ly (37.9 ± 0.2 pc) |
Absolute magnitude (MV) | 1.11 [5] |
Details | |
Mass | 2.16 [6] M☉ |
Radius | 7.81 [6] R☉ |
Luminosity | 37.1 [6] L☉ |
Temperature | 5,100 [6] K |
Metallicity [Fe/H] | −0.05 [7] dex |
Rotational velocity (v sin i) | 0.71 [7] km/s |
Age | 660 [7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Rho Cygni, Latinized from ρ Cygni, is a yellow-hued star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent magnitude of 4.02. [2] The measured annual parallax shift is 26.39 milliarcseconds, [1] which yields a distance estimate of 124 light years. It is moving further from the Sun with a radial velocity of +6.88. [4] The star is a member of the thin disk population of the Milky Way galaxy. [7]
This is an evolved giant star of type G with an estimated age of 660 [7] million years and a stellar classification of G8 III Fe-0.5. [3] The suffix notation indicates the spectrum shows a mild underabundance of iron in the outer atmosphere. It has about 2.16 times the mass of the Sun and 7.81 times the Sun's girth. [6] The star is radiating 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,100 K. [6]
Rho Cygni is a bright X-ray source with a luminosity of 10.26×1029 ergs s−1. [8] It has a maximum magnetic field strength of 7.3±0.5 G [9] at the surface.