29 Arietis

29 Arietis
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]
Distance93.6 ± 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
Mass1.14[5] M
Radius1.59+0.07
−0.05
 R
Luminosity3.27[2] L
Surface gravity (log g)4.12[6] cgs
Temperature6,063±114[4] K
Metallicity [Fe/H]0.09[6] dex
Age3.0±1.8[4] Gyr
29 Ari B
Mass0.88[5] M
Temperature5,270±170[4] K
Other designations
29 Ari, BD+14°419, FK5 2176, GJ 3161, HD 15814, HIP 11843, HR 741, SAO 92998, WDS J02329+1502[7]
Database references
SIMBADdata

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]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Lu1986 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Katoh2013 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference aaa450_2_681 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).