HD 142245
HD 142245 is a hierarchical triple star system about 318 light-years away.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 52m 56.2803s |
| Declination | +15° 25′ 50.5399″ |
| Apparent magnitude (V) | 7.45 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | K0IV+M1 |
| Astrometry | |
| Radial velocity (Rv) | 6.92 km/s |
| Proper motion (μ) | RA: -57.477 mas/yr Dec.: -21.764 mas/yr |
| Parallax (π) | 10.2562 ± 0.0411 mas |
| Distance | 318 ± 1 ly (97.5 ± 0.4 pc) |
| Orbit | |
| Primary | HD 142245 A |
| Companion | HD 142245 BC |
| Semi-major axis (a) | 2.5" (237 AU) |
| Details | |
| HD 142245 A | |
| Mass | 1.52±0.05 M☉ |
| Radius | 4.8±0.1 R☉ |
| Luminosity | 11.4 L☉ |
| Surface gravity (log g) | 3.21±0.14 cgs |
| Temperature | 4838±36 K |
| Metallicity | 0.20±0.02 |
| Age | 2.855±0.514 Gyr |
| HD 142245 BC | |
| Mass | 0.56 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
The primary subgiant star HD 142245 A belongs to the spectral class of K0. Its age is much younger than Sun`s at 2.855±0.514 billion years. The primary star is slightly enriched by heavy elements, having 160% of solar abundance.
In 2014, the co-moving binary stellar companion HD 142245 BC was detected. It consists of pair of red dwarf stars with composite spectral class M1, orbiting each other on 4 AU orbit.
No other stellar companions were found at projected separations from 5.48 to 153.34 AU around HD 142245 A.
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