Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 01h 50m 08.56984s [1] |
Declination | +22° 16′ 31.2100″ [1] |
Apparent magnitude (V) | 5.86 [2] (6.4/7.2) [3] |
Characteristics | |
Spectral type | K1 III + A6 V [3] |
U−B color index | +0.5 [2] |
B−V color index | +0.74 [2] |
Astrometry | |
Radial velocity (Rv) | 6.95±0.13 [4] km/s |
Proper motion (μ) |
RA: –16.52
[1]
mas/
yr Dec.: –8.25 [1] mas/ yr |
Parallax (π) | 5.57 ± 0.75 mas [1] |
Distance | approx. 590
ly (approx. 180 pc) |
Absolute magnitude (MV) | −0.39 [4] |
Details | |
Luminosity | 141.51 [4] L☉ |
Other designations | |
1 Ari A: HD 11154. | |
1 Ari B: HD 11155. | |
Database references | |
SIMBAD | data |
1 Arietis is a double star [3] in the northern constellation of Aries. 1 Arietis is the Flamsteed designation. The pair have a combined visual magnitude of 5.86, [2] making it faintly visible to the naked eye. Based upon an annual parallax shift of 5.57 mas, [1] the distance to the two stars is approximately 590 light-years (180 parsecs). As of 2016, the secondary had an angular separation of 2.90 ″ along a position angle of 165° from the primary. [6] They are moving further from the Earth with a heliocentric radial velocity of +7 km/s. [4]
The brighter star, designated component A, is a magnitude 6.40 giant star with a stellar classification of K1 III. The companion star, component B, is a magnitude 7.20 A-type main sequence star with a classification of A6 V. [3] Helmut Abt (1985) had this star classified as A3 IV, [7] matching a more evolved subgiant.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 01h 50m 08.56984s [1] |
Declination | +22° 16′ 31.2100″ [1] |
Apparent magnitude (V) | 5.86 [2] (6.4/7.2) [3] |
Characteristics | |
Spectral type | K1 III + A6 V [3] |
U−B color index | +0.5 [2] |
B−V color index | +0.74 [2] |
Astrometry | |
Radial velocity (Rv) | 6.95±0.13 [4] km/s |
Proper motion (μ) |
RA: –16.52
[1]
mas/
yr Dec.: –8.25 [1] mas/ yr |
Parallax (π) | 5.57 ± 0.75 mas [1] |
Distance | approx. 590
ly (approx. 180 pc) |
Absolute magnitude (MV) | −0.39 [4] |
Details | |
Luminosity | 141.51 [4] L☉ |
Other designations | |
1 Ari A: HD 11154. | |
1 Ari B: HD 11155. | |
Database references | |
SIMBAD | data |
1 Arietis is a double star [3] in the northern constellation of Aries. 1 Arietis is the Flamsteed designation. The pair have a combined visual magnitude of 5.86, [2] making it faintly visible to the naked eye. Based upon an annual parallax shift of 5.57 mas, [1] the distance to the two stars is approximately 590 light-years (180 parsecs). As of 2016, the secondary had an angular separation of 2.90 ″ along a position angle of 165° from the primary. [6] They are moving further from the Earth with a heliocentric radial velocity of +7 km/s. [4]
The brighter star, designated component A, is a magnitude 6.40 giant star with a stellar classification of K1 III. The companion star, component B, is a magnitude 7.20 A-type main sequence star with a classification of A6 V. [3] Helmut Abt (1985) had this star classified as A3 IV, [7] matching a more evolved subgiant.