LP 71-82
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Draco |
| Right ascension | 18h 02m 16.60s |
| Declination | 64° 15′ 44.6″ |
| Apparent magnitude (V) | 13.51 |
| Characteristics | |
| Spectral type | M5.0V |
| Apparent magnitude (J) | 8.54 |
| Astrometry | |
| Proper motion (μ) | RA: 196.394 mas/yr Dec.: -383.789 mas/yr |
| Parallax (π) | 128.3057±0.0319 mas |
| Distance | 25.420 ± 0.006 ly (7.794 ± 0.002 pc) |
| Details | |
| Mass | 0.16±0.01 M☉ |
| Radius | 0.195±0.002 R☉ |
| Luminosity | 0.0033±0.0003 L☉ |
| Habitable zone inner limit | 0.06 |
| Habitable zone outer limit | 0.12 |
| Surface gravity (log g) | 4.5 cgs |
| Temperature | 3124±51 K |
| Rotation | 0.28018±0.000010 d |
| Rotational velocity (v sin i) | 11.3±1.5 km/s |
| Age | 0.5+1.1 −0.34 Gyr |
| Other designations | |
| G 227-22, LP 71-82, LSPM J1802+6415, NLTT 45873, GSC 04209-01465, 2MASS J18021660+6415445, Gaia DR2 2161121135533953536 | |
| Database references | |
| SIMBAD | data |
LP 71-82 is a red dwarf star, located in constellation Draco at 25.42 light-years from Earth. Kinematically, it is probably belongs to the Ursa Major Moving Group.
LP 71-82 is a flare star with a very strong activity, with at least four flares detected by 2019. Such activity is expected for a star with a short rotational period of just 6 hours. As a low mass star, it is fully convective. It is visible nearly pole-on, with rotational axis deflected from the Sun by 19±3° degrees. The star has a magnetic fields in chromosphere in 3.8-4.7 kilogauss range.
Multiplicity surveys did not find any stellar companions to LP 71-82 as in 2014.