HD 106515
HD 106515 is a binary star (and currently visual triple system) in the constellation of Virgo.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| HD 106515 A | |
| Right ascension | 12h 15m 06.5667s |
| Declination | –07° 15′ 26.353″ |
| Apparent magnitude (V) | +7.99 |
| HD 106515 B | |
| Right ascension | 12h 15m 06.1003s |
| 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 [Fe/H] | +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 [Fe/H] | +0.022±0.010 dex |
| Rotational velocity (v sin i) | 1.8 km/s |
| Age | 9.155±2.199 Gyr |
| Other designations | |
| 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 |
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.
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