HD 106515

LTT 4599

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Virgo
Right ascension	12h 15m 06.567s
Declination	–07° 15′ 26.35″
Apparent magnitude (V)	+7.35
Characteristics
Spectral type	G5
Astrometry
Proper motion (μ)	RA: –249.67 ± 0.91 mas/yr Dec.: –52.29 ± 0.74 mas/yr
Parallax (π)	28.42 ± 0.96 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.

The third star in the visual trinary, BD-06 3533, is likely not bound with LTT 4599 and LTT 4598.

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.

The LTT 4599 planetary system

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	—	—