Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Cepheus |
Right ascension | 22h 26m 42.40624s [1] |
Declination | +78° 47′ 09.0725″ [1] |
Apparent magnitude (V) | 5.84 [2] |
Characteristics | |
Spectral type | A2m [3] |
B−V color index | −0.16 [2] |
Astrometry | |
Proper motion (μ) |
RA: −13.33
[1]
mas/
yr Dec.: −36.95 [1] mas/ yr |
Parallax (π) | 15.83 ± 0.23 mas [1] |
Distance | 206 ± 3
ly (63.2 ± 0.9 pc) |
Details | |
ρ1 Cep A | |
Mass | 2.00 [3] M☉ |
Rotational velocity (v sin i) | 81 [4] km/s |
Age | 320 [3] Myr |
ρ1 Cep B | |
Mass | 0.51 [3] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Rho1 Cephei (ρ1 Cephei) is a double star located in the northern constellation of Cepheus. As of 2014, the pair had an angular separation of 0.29 arc seconds along a position angle of 211.1°. This corresponds to a projected separation of 18.1 AU. [3] Rho1 Cephei is faintly visible to the naked eye with an apparent visual magnitude of 5.84, [2] and it forms an optical pair with the brighter star Rho2 Cephei. Based upon an annual parallax shift of 15.83 mas as seen from the Earth, [1] Rho1 Cephei is located about 206 light years from the Sun.
The primary component is a chemically peculiar Am star with a stellar classification of A2m. [3] It has twice the mass of the Sun and is around 320 million years old. [3] The smaller companion may be the source of the X-ray emission from this location, as stars similar to the primary component do not generally produce detectable levels of X-rays. [6]
{{
cite web}}
: CS1 maint: postscript (
link)
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Cepheus |
Right ascension | 22h 26m 42.40624s [1] |
Declination | +78° 47′ 09.0725″ [1] |
Apparent magnitude (V) | 5.84 [2] |
Characteristics | |
Spectral type | A2m [3] |
B−V color index | −0.16 [2] |
Astrometry | |
Proper motion (μ) |
RA: −13.33
[1]
mas/
yr Dec.: −36.95 [1] mas/ yr |
Parallax (π) | 15.83 ± 0.23 mas [1] |
Distance | 206 ± 3
ly (63.2 ± 0.9 pc) |
Details | |
ρ1 Cep A | |
Mass | 2.00 [3] M☉ |
Rotational velocity (v sin i) | 81 [4] km/s |
Age | 320 [3] Myr |
ρ1 Cep B | |
Mass | 0.51 [3] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Rho1 Cephei (ρ1 Cephei) is a double star located in the northern constellation of Cepheus. As of 2014, the pair had an angular separation of 0.29 arc seconds along a position angle of 211.1°. This corresponds to a projected separation of 18.1 AU. [3] Rho1 Cephei is faintly visible to the naked eye with an apparent visual magnitude of 5.84, [2] and it forms an optical pair with the brighter star Rho2 Cephei. Based upon an annual parallax shift of 15.83 mas as seen from the Earth, [1] Rho1 Cephei is located about 206 light years from the Sun.
The primary component is a chemically peculiar Am star with a stellar classification of A2m. [3] It has twice the mass of the Sun and is around 320 million years old. [3] The smaller companion may be the source of the X-ray emission from this location, as stars similar to the primary component do not generally produce detectable levels of X-rays. [6]
{{
cite web}}
: CS1 maint: postscript (
link)