HD 106515
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 15m 06.567s[1] |
| Declination | –07° 15′ 26.35″[1] |
| Apparent magnitude (V) | +7.35 |
| Characteristics | |
| Spectral type | G5 |
| Astrometry | |
| Proper motion (μ) | RA: –249.67 ± 0.91[1] mas/yr Dec.: –52.29 ± 0.74[1] mas/yr |
| Parallax (π) | 28.42 ± 0.96[1] mas |
| Distance | 115 ± 4 ly (35 ± 1 pc) |
| Details | |
| Mass | 0.97 ± 0.01 M☉ |
| Radius | 1.62 ± 0.05 R☉ |
| Luminosity | 1.23 L☉ |
| Surface gravity (log g) | 4.41 ± 0.04 cgs |
| Temperature | 5362 ± 29 K |
| Metallicity [Fe/H] | 0.03 ± 0.02 dex |
| Age | 11.7 ± 0.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 106515 is a binary system (and currently visual trinary system).
The A and B stars are both G-class yellow dwarfs. They have separate entries in LTT. The A star is LTT 4599 (in the starbox) and the B star is LTT 4598 (G8 dwarf, mass 0.89). The two are gravitationally bound and separated at 310 AU. The binary semimajor axis is 390 AU.[2]
The third star in the visual trinary, BD-06 3533, is likely not bound with LTT 4599 and LTT 4598.[2]
Planetary system
From 1998 to 2012, the system was under observance from "the CORALIE echelle spectrograph at La Silla Observatory".
In 2012, a long-period, wide-orbiting planet was deduced at LTT 4599 / HD 106515 A by radial velocity. This was published in November. The planet has been pulled to an eccentric orbit by the B star LTT 4598.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >9.61±0.14 MJ | 4.590±0.010 | 3630±12 | 0.572±0.011 | — | — |
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- 1 2 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.
- ↑ "hd_106515_b".
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