HD 106515

HD 106515 is a binary star (and currently visual triple system) in the constellation of Virgo.

HD 106515
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
HD 106515 A
Right ascension  12h 15m 06.5668s[1]
Declination –07° 15′ 26.3523″[1]
Apparent magnitude (V) +7.99[2]
HD 106515 B
Right ascension  12h 15m 06.1004s[3]
Declination –07° 15′ 26.5837″[3]
Apparent magnitude (V) +8.25[2]
Characteristics
HD 106515 A
Spectral type K0 V[2]
HD 106515 B
Spectral type K1 V[2]
Astrometry
HD 106515 A
Radial velocity (Rv)20.66±0.11[4] km/s
Proper motion (μ) RA: −251.577±0.117[1] mas/yr
Dec.: −51.389±0.080[1] mas/yr
Parallax (π)29.3041 ± 0.0729[1] mas
Distance111.3 ± 0.3 ly
(34.12 ± 0.08 pc)
Absolute magnitude (MV)4.62[5]
HD 106515 B
Radial velocity (Rv)19.94±0.11[4] km/s
Proper motion (μ) RA: −244.685±0.120[3] mas/yr
Dec.: −67.933±0.083[3] mas/yr
Parallax (π)29.3916 ± 0.0749[3] mas
Distance111.0 ± 0.3 ly
(34.02 ± 0.09 pc)
Orbit[2]
PrimaryHD 106515 A
CompanionHD 106515 B
Period (P)4802.1+2397
−1141 yr
Semi-major axis (a)9.822+2.688
−1.329"
(345+95
−47 AU)
Eccentricity (e)0.420+0.106
−0.104
Inclination (i)164.45+3.5
−11.3°
Longitude of the node (Ω)92.06+45.08
−2.67°
Periastron epoch (T)2376.4+44.4
−78.9
Argument of periastron (ω)
(secondary)		250.50+38.22
−14.07°
Details[6]
HD 106515 A
Mass0.888±0.018 M☉
Radius0.910±0.009 R☉
Luminosity1.23 L☉
Surface gravity (log g)4.39±0.18 cgs
Temperature5364±57 K
Metallicity [Fe/H]+0.016±0.009 dex
Age9.233±2.133 Gyr
HD 106515 B
Mass0.861±0.015 M☉
Radius0.865±0.015 R☉
Luminosity1.23 L☉
Surface gravity (log g)4.30±0.20 cgs
Temperature5190±58 K
Age9.155±2.199 Gyr
Other designations
BD−06° 3532, HIP 59743, ADS 8477 AB, WDS J12151-0715AB[7]
HD 106515 A: BD−06° 3532A, Gaia DR2 3584074380866605440, HD 106515A, HIP 59743, SAO 138673, WDS J12151-0715A, LTT 4599, 2MASS J12150658-0715263[8]
HD 106515 B: BD−06° 3532B, Gaia DR2 3584074376569429248, HD 106515B, HIP 59743, SAO 138674, WDS J12151-0715B, LTT 4598, 2MASS J12150611-0715265[9]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

The A and B stars are both K-type main-sequence stars. The two are gravitationally bound and separated at 310 AU. The binary semimajor axis is 390 AU.[5]

The third star in the visual triple, BD−06° 3533, is a physically unrelated background star.[2]

Stellar system

HD 106515 AB is a wide binary system which was first observed by Jérôme de Lalande in 1795.[2]

Planetary system

The discovery of HD 106515 Ab was announced in a preprint submitted on September 12, 2011.[10] The discovery was made using radial velocity measurements obtained at the CORALIE spectrograph located at La Silla Observatory.[5] Confirmation of the discovery was made by a separate team using the Galileo National Telescope at the Roque de los Muchachos Observatory on the island of La Palma in the Canary Islands, Spain.[11]

The HD 106515 A planetary system[5][6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥9.08±0.20 MJ 4.590±0.010 3630±12 0.572±0.011 — —

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Rica, F. M.; et al. (2017). "Dynamical Study of the Exoplanet Host Binary System HD 106515". Publications of the Astronomical Society of Australia. 34. e004. Bibcode:2017PASA...34....4R. doi:10.1017/pasa.2016.59.
  3. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  4. Desidera, S.; et al. (2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics. 454 (2): 553–558. Bibcode:2006A&A...454..553D. doi:10.1051/0004-6361:20064895.
  5. Marmier, M.; et al. (2013). "The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets". Astronomy and Astrophysics. 551. A90. arXiv:1211.6444. Bibcode:2013A&A...551A..90M. doi:10.1051/0004-6361/201219639.
  6. Saffe, C.; et al. (2019). "High-precision analysis of binary stars with planets. I. Searching for condensation temperature trends in the HD 106515 system". Astronomy and Astrophysics. 625. A39. arXiv:1904.01955. Bibcode:2019A&A...625A..39S. doi:10.1051/0004-6361/201935352.
  7. "HD 106515". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  8. "HD 106515A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  9. "HD 106515B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  10. Mayor, M.; et al. (September 12, 2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets". arXiv:1109.2497 [astro-ph].
  11. Desidera, S.; et al. (2012). "A long-period massive planet around HD 106515A". Astronomy and Astrophysics. 546. A108. Bibcode:2012A&A...546A.108D. doi:10.1051/0004-6361/201220038.
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