LP 71-82
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File:LP71-82LightCurve.png An R band light curve for LP 71-82 showing flares, adapted from Baran et al. (2013)[1] | |
| 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[1] |
| Characteristics | |
| Spectral type | M5.0V |
| Apparent magnitude (J) | 8.54[2] |
| Astrometry | |
| Proper motion (μ) | RA: 196.394 mas/yr[3] Dec.: -383.789 mas/yr[3] |
| Parallax (π) | 128.3057±0.0319 mas[3] |
| Distance | 25.420 ± 0.006 ly (7.794 ± 0.002 pc) |
| Details[4] | |
| 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[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 | |
| Gaia DR2 2161121135533953536, G 227-22, LP 71-82, LSPM J1802+6415, NLTT 45873, GSC 04209-01465, 2MASS J18021660+6415445 | |
| Database references | |
| SIMBAD | data |
LP 71-82 is a red dwarf star, located in constellation Draco at 25.42 light-years from Earth.[3] Kinematically, it is probably belongs to the Ursa Major Moving Group.[6]
LP 71-82 is a flare star with a very strong activity,[1] with at least four flares detected by 2019.[5] 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.[4] The star has a magnetic fields in chromosphere in 3.8-4.7 kilogauss range.[7]
Multiplicity surveys did not find any stellar companions to LP 71-82 as in 2014.[8]
References
[edit | edit source]- ^ a b c Mt. Suhora Survey – Searching for Pulsating M Dwarfs. III
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (Erratum: Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).). Gaia EDR3 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Reliable probabilistic determination of membership in stellar kinematic groups in the young disk, Table 4
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
