| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| HD 106515 A | |
| Right ascension | 12 15 06.5667 |
| Declination | –07° 15′ 26.353″ |
| Apparent magnitude (V) | +7.99 |
| HD 106515 B | |
| Right ascension | 12 15 06.1003 |
| Declination | –07° 15′ 26.587″ |
| Apparent magnitude (V) | +8.25 |
| Characteristics | |
| HD 106515 A | |
| Spectral type | K0 V |
| HD 106515 B | |
| Spectral type | K1 V |
| Astrometry | |
| HD 106515 A | |
| Radial velocity (Rv) | 20.66±0.11 km/s |
| Proper motion (μ) | RA: −251.469 mas/yr Dec.: −51.330 mas/yr |
| Parallax (π) | 29.3148 ± 0.0297 mas |
| Distance | 111.3 ± 0.1 ly (34.11 ± 0.03 pc) |
| HD 106515 B | |
| Radial velocity (Rv) | 19.94±0.11 km/s |
| Proper motion (μ) | RA: −244.603 mas/yr Dec.: −67.744 mas/yr |
| Parallax (π) | 29.3908 ± 0.0294 mas |
| Distance | 111.0 ± 0.1 ly (34.02 ± 0.03 pc) |
| Absolute magnitude (MV) | 4.62 |
| Orbit | |
| Primary | HD 106515 A |
| Companion | HD 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 | |
| HD 106515 A | |
| Mass | 0.888±0.018 M☉ |
| Radius | 0.910±0.009 R☉ |
| Luminosity | 0.68±0.05 L☉ |
| Surface gravity (log g) | 4.39±0.18 cgs |
| Temperature | 5364±57 K |
| Metallicity | +0.016±0.009 dex |
| Rotational velocity (v sin i) | 1.7 km/s |
| Age | 9.233±2.133 Gyr |
| HD 106515 B | |
| Mass | 0.861±0.015 M☉ |
| Radius | 0.865±0.015 R☉ |
| Luminosity | 0.55±0.05 L☉ |
| Surface gravity (log g) | 4.30±0.20 cgs |
| Temperature | 5190±58 K |
| Metallicity | +0.022±0.010 dex |
| Rotational velocity (v sin i) | 1.8 km/s |
| Age | 9.155±2.199 Gyr |
| Other designations | |
| BD−06°3532, HIP 59743, ADS 8477 AB, WDS J12151-0715AB | |
| HD 106515 A: Gaia DR2 3584074380866605440, SAO 138673, LTT 4599, 2MASS J12150658-0715263 | |
| HD 106515 B: Gaia DR2 3584074376569429248, SAO 138674, LTT 4598, 2MASS J12150611-0715265 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 106515 is a binary star (and currently visual triple system) in the constellation of Virgo.
The A and B stars are both K-type main-sequence stars, both somewhat smaller and cooler than the Sun. The two are gravitationally bound and separated at 310 AU. The binary semimajor axis is 390 AU.
The third star in the visual triple, BD−06°3533, is a physically unrelated background star.
Properties
HD 106515 AB is a wide binary system which was first observed by Jérôme de Lalande in 1795.
The discovery of HD 106515 Ab was announced in a preprint submitted on September 12, 2011. The discovery was made using radial velocity measurements obtained at the CORALIE spectrograph located at La Silla Observatory. 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. Initially announced as an exoplanet, astrometric observations in 2021 have found that the true mass is significantly higher than its minimum mass predicted from radial velocity, so it is likely a brown dwarf. A 2022 study found a true mass closer to the minimum mass, but the parameters are less well constrained.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 18.9+1.5 −1.4 MJ |
4.48±0.050 | 9.927+0.030 −0.032 |
0.571±0.012 | 29.2+2.4 −2.2° |
— |
References
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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.
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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.
- ^ 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.
- 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. S2CID 102484807.
- ^ Sissa, E.; Gratton, R.; Desidera, S.; Martinez Fiorenzano, A. F.; Bonfanti, A.; Carolo, E.; Vassallo, D.; Claudi, R. U.; Endl, M.; Cosentino, R. (2016). "Hα-activity and ages for stars in the SARG survey". Astronomy and Astrophysics. 596: A76. arXiv:1609.04660. Bibcode:2016A&A...596A..76S. doi:10.1051/0004-6361/201628531. S2CID 54202186.
- "HD 106515". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
- "HD 106515A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
- "HD 106515B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
- ^ 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 .
- Desidera, S.; et al. (2012). "A long-period massive planet around HD 106515A". Astronomy and Astrophysics. 546. A108. arXiv:1208.3963. Bibcode:2012A&A...546A.108D. doi:10.1051/0004-6361/201220038.
- ^ Li, Yiting; Brandt, Timothy D.; Brandt, G. Mirek; Dupuy, Trent J.; Michalik, Daniel; Jensen-Clem, Rebecca; Zeng, Yunlin; Faherty, Jacqueline; Mitra, Elena L. (2021). "Precise Masses and Orbits for Nine Radial-velocity Exoplanets". The Astronomical Journal. 162 (6): 266. arXiv:2109.10422. Bibcode:2021AJ....162..266L. doi:10.3847/1538-3881/ac27ab. S2CID 237592581.
- Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
