Astronomy:29 Arietis
| Observation data 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[1] mas |
| 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 astronomical unit|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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ Lu, W. (April 1986), "The spectroscopic orbit of the double-lined binary 29 ARIETIS", Astronomical Society of the Pacific, Publications 98: 468–470, doi:10.1086/131780, Bibcode: 1986PASP...98..468L.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Katoh, Noriyuki et al. (February 2013), "Determination of Orbital Elements of Spectroscopic Binaries Using High-dispersion Spectroscopy", The Astronomical Journal 145 (2): 12, doi:10.1088/0004-6256/145/2/41, 41, Bibcode: 2013AJ....145...41K.
- ↑ 5.0 5.1 5.2 5.3 5.4 Tokovinin, A. et al. (May 2006), "Tertiary companions to close spectroscopic binaries", Astronomy and Astrophysics 450 (2): 681–693, doi:10.1051/0004-6361:20054427, Bibcode: 2006A&A...450..681T.
- ↑ 6.0 6.1 Casagrande, L. et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics 530: A138, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C.
- ↑ "29 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=29+Ari.
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