| 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 was invoked but never defined (see the help page).Anderson2012 was invoked but never defined (see the help page).Lu1986 was invoked but never defined (see the help page).Katoh2013 was invoked but never defined (see the help page).aaa450_2_681 was invoked but never defined (see the help page).Casagrande2011 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).