Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Aries |
Right ascension | 02h 32m 54.14202s[1] |
Declination | +15° 02′ 04.3103″[1] |
Apparent magnitude (V) | 6.00[2] |
Characteristics | |
Spectral type | F7 V + G5 V[3] + ? |
B−V color index | 0.572±0.006[2] |
Astrometry | |
Radial velocity (Rv) | 9.1±2.5[2] km/s |
Proper motion (μ) | RA: −20.557[1] mas/yr Dec.: +50.206[1] mas/yr |
Parallax (π) | 34.8568 ± 0.1313 mas[1] |
Distance | 93.6 ± 0.4 ly (28.7 ± 0.1 pc) |
Absolute magnitude (MV) | 4.2/5.0[4] |
Orbit[4] | |
Period (P) | 19.4161±0.0005 d |
Eccentricity (e) | 0.4096±0.0033 |
Longitude of the node (Ω) | 179.09±0.44° |
Periastron epoch (T) | 2,454,101.914±0.018 JD |
Semi-amplitude (K1) (primary) | 23.36±0.09 km/s |
Details | |
29 Ari A | |
Mass | 1.14[5] M☉ |
Radius | 1.59+0.07 −0.05 R☉ |
Luminosity | 3.27[2] L☉ |
Surface gravity (log g) | 4.12[6] cgs |
Temperature | 6,063±114[4] K |
Metallicity [Fe/H] | 0.09[6] dex |
Age | 3.0±1.8[4] Gyr |
29 Ari B | |
Mass | 0.88[5] M☉ |
Temperature | 5,270±170[4] K |
Other designations | |
Database references | |
SIMBAD | data |
29 Arietis is a triple star[5] system in the northern constellation of Aries. 29 Arietis is the Flamsteed designation. Its annual parallax shift of 34.86±0.13 mas[1] indicates a distance of about 94 light-years (29 parsecs) from Earth. The system is barely visible to the naked eye with an apparent visual magnitude of 6.0; it is 0.02 degree north of the ecliptic.[2] It is moving further from Earth with a heliocentric radial velocity of 9 km/s.[2]
The core of the system is formed by a close spectroscopic binary with an angular separation of 3.892 mas,[5] a semimajor axis of 0.15692±0.00086 AU, an orbital period of 19.4 days, and an eccentricity of 0.4.[4] The larger member of this pair has 114% of the mass of the Sun, while its companion has 88% of the Sun's mass. Orbiting the pair at an angular separation of 1.422 arcseconds over a period of 164 years, the tertiary component has 52% of the Sun's mass.[5]
GaiaDR2
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