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HD 125351

"A Boötis" redirects here and is not to be confused with α Boötis.
HD 125351
Observation data
Epoch J2000      Equinox J2000
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 mas[2]
Distance233 ± 7 ly
(72 ± 2 pc)
Absolute magnitude (MV)+0.53[1]
Orbit[6]
PrimaryA Boötis Aa1
CompanionA 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
Mass3.0[7] M☉
Radius13[4] R☉
Luminosity75[4] L☉
Surface gravity (log g)2.25[8] cgs
Temperature4,650[8] K
Metallicity [Fe/H]−0.03[8] dex
Aa2
Mass1.2[7] M☉
Ab
Mass1.85[7] M☉
Other designations
A Boötis, BD+36°2468, HD 125351, HIP 69879, HR 5361, SAO 64053
Database references
SIMBADdata

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]

  1. ^ a b Cite error: The named reference xhip was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aa430_165 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference dr3 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Griffin1961 was invoked but never defined (see the help page).
  6. ^ Ren, Shulin (2013). "Hipparcos Photocentric Orbits of 72 Single-lined Spectroscopic Binaries". The Astronomical Journal. 145 (3): 81. Bibcode:2013AJ....145...81R. doi:10.1088/0004-6256/145/3/81. S2CID 120199240.
  7. ^ a b c d Cite error: The named reference msc was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference aj110_2968 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa398_1163 was invoked but never defined (see the help page).

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