Astronomy:HD 125351
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 14h 17m 59.81955s[2] |
| Declination | +35° 30′ 34.2208″[2] |
| Apparent magnitude (V) | 4.9660±0.0007[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[4] |
| Spectral type | K1III[5] |
| Astrometry | |
| Radial velocity (Rv) | −21.6±0.3[3] km/s |
| Proper motion (μ) | RA: 4.87[2] mas/yr Dec.: 14.40[2] mas/yr |
| Parallax (π) | 13.97 ± 0.39[2] mas |
| Distance | 233 ± 7 ly (72 ± 2 pc) |
| Absolute magnitude (MV) | +0.53[1] |
| Orbit[6] | |
| Primary | A Boötis Aa1 |
| Companion | A Boötis Aa2 |
| Period (P) | 212.085 days |
| Semi-major axis (a) | 2.3 mas |
| Eccentricity (e) | 0.570 |
| Inclination (i) | 83.5° |
| Longitude of the node (Ω) | 195.2° |
| Periastron epoch (T) | 2,440,286.002 |
| Argument of periastron (ω) (secondary) | 224.9° |
| Details | |
| Aa1 | |
| Mass | 3.0[7] M☉ |
| Radius | 13[4] R☉ |
| Luminosity | 75[4] L☉ |
| Surface gravity (log g) | 2.25[8] cgs |
| Temperature | 4,650[8] K |
| Metallicity [Fe/H] | −0.03[8] dex |
| Aa2 | |
| Mass | 1.2[7] M☉ |
| Ab | |
| Mass | 1.85[7] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 125351 or A Boötis (A Boo) is multiple star system in the constellation Boötes. The system has an apparent magnitude of +4.97, with a spectrum matching a K-type giant star. It is approximately 233 light-years from Earth.
HD 125351 is an astrometric and single-lined spectroscopic binary with a known 212-day orbit.[9] Speckle interferometry has detected a companion at a separation of 0.09″, which is likely to be a different star from the unseen spectroscopic companion. It is 1.45 magnitudes fainter than the visible primary in the near infrared. An orbital period of seven years is suggested. This would make HD 125351 a triple system. Further faint stars at separations of 14″ and 96″ share a common proper motion although any orbits would take many thousands of years.[7]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 Famaey, B. et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics 430: 165–186, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F.
- ↑ 4.0 4.1 4.2 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Griffin, R. F. (1961), "Photoelectric measurements of the lambda5250A Fe I triplet and the D lines in G and K stars", Monthly Notices of the Royal Astronomical Society 122: 181, doi:10.1093/mnras/122.3.181, Bibcode: 1961MNRAS.122..181G.
- ↑ Ren, Shulin (2013). "Hipparcos Photocentric Orbits of 72 Single-lined Spectroscopic Binaries". The Astronomical Journal 145 (3): 81. doi:10.1088/0004-6256/145/3/81. Bibcode: 2013AJ....145...81R.
- ↑ 7.0 7.1 7.2 7.3 Tokovinin, Andrei (2018), "The Updated Multiple Star Catalog", The Astrophysical Journal Supplement Series 235 (1): 6, doi:10.3847/1538-4365/aaa1a5, Bibcode: 2018ApJS..235....6T.
- ↑ 8.0 8.1 8.2 Luck, R. Earle; Challener, Sharon L. (December 1995), "Chemical Abundances for Very Strong-Lined Giants", Astronomical Journal 110: 2968, doi:10.1086/117741, Bibcode: 1995AJ....110.2968L.
- ↑ Pourbaix, D.; Boffin, H. M. J. (February 2003), "Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component", Astronomy and Astrophysics 398 (3): 1163–1177, doi:10.1051/0004-6361:20021736, Bibcode: 2003A&A...398.1163P.
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