HD 106515

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[2]
Characteristics
Spectral type G5[2]
Astrometry
Radial velocity (Rv)21.6 ± 2[3] km/s
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
Distance115 ± 4 ly
(35 ± 1 pc)
Absolute magnitude (MV)4.62[2]
Details[2]
Mass0.97 ± 0.01 M☉
Radius1.62 ± 0.05 R☉
Luminosity1.23 L☉
Surface gravity (log g)4.41 ± 0.04 cgs
Temperature5362 ± 29 K
Metallicity [Fe/H]+0.03 ± 0.02 dex
Age11.7 ± 0.2 Gyr
Other designations
BD−06° 3532, HD 106515A, HIP 59743, SAO 138674, CCDM J12151-716A, LTT 4599
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

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

The A and B stars are both G-type main-sequence stars. They have separate entries in the Luyten Two-Tenths catalogue (LTT), a catalog of high-proper-motion stars. The primary (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 triple, BD-06° 3533, is likely not bound with LTT 4599 and LTT 4598.[2]

Planetary system

From 1998 to 2012, the system was under observation from the CORALIE spectrograph at the 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.

The LTT 4599 planetary system[4]
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. 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
  2. 1 2 3 4 5 6 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.
  3. ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
  4. ↑ "hd_106515_b". Extrasolar Planets Encyclopaedia.


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