HD 106515

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LTT 4599
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
HD 106515A, HIP 59743, CCDM J12151-716A, LTT 4599
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[edit]

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.

The LTT 4599 planetary system[3]
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[edit]

  1. ^ a b c d e 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. ^ a b 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. ^ "hd_106515_b".