HD 113337
HD 113337 (LDS 2662 A) is the primary component of binary star system LDS 2662, about 118 light-years away from Earth. The primary main-sequence star belongs to the spectral class of F6. The star system is extremely young, and it is slightly enriched in heavy elements, with an abundance of such elements at about 115% that of the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 13h 01m 46.9272s |
| Declination | 63° 36′ 36.7958″ |
| Apparent magnitude (V) | 6.03 |
| Characteristics | |
| Spectral type | F6V+M3.5V+M3.5V |
| Astrometry | |
| Radial velocity (Rv) | −14.93±0.13 km/s |
| Proper motion (μ) | RA: −173.342±0.035 mas/yr Dec.: 24.850±0.027 mas/yr |
| Parallax (π) | 27.6253 ± 0.0253 mas |
| Distance | 118.1 ± 0.1 ly (36.20 ± 0.03 pc) |
| Orbit | |
| Primary | HD 113337 |
| Companion | LSPM J1301+6337 |
| Semi-major axis (a) | 119″ (4310 AU)″ |
| Details | |
| HD 113337 | |
| Mass | 1.48±0.08 M☉ |
| Radius | 1.50±0.04 R☉ |
| Luminosity | 4.29±0.25 L☉ |
| Surface gravity (log g) | 4.21±0.08 cgs |
| Temperature | 6774±125 K |
| Metallicity | 0.07±0.02 |
| Rotational velocity (v sin i) | 1.82±0.07 km/s |
| Age | 15+6 −1 Myr |
| LSPM J1301+6337 | |
| Mass | 0.245*2 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
The primary star is surrounded by a debris disk discovered by the Herschel Space Observatory, and the plane of the disk is likely misaligned with the planetary orbits by 17–32°. The effective temperature of this disk is 55 K.
The possibility of other stellar companions near the primary star was ruled out in 2016, for projected separations above 5″ (181 AU).
The existence of a secondary companion (called LDS 2662 B, or LSPM J1301+6337) was discovered in 2001 and confirmed to be bound to the primary in 2007. Initially believed to be a single red dwarf star, in 2012 the companion was discovered to actually be a pair of nearly identical red dwarfs, of spectral class M3.5, orbiting each other at a distance of 7.2±2.6 AU, with a period of 39 years.