astro.wikisort.org - StarLP 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]
Red dwarf star in the constellation Draco
LP 71-82
 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 |
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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) |
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Details[4] |
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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 |
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Other designations |
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Gaia DR2 2161121135533953536, G 227-22, LP 71-82, LSPM J1802+6415, NLTT 45873, GSC 04209-01465, 2MASS J18021660+6415445 |
Database references |
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SIMBAD | data |
Multiplicity surveys do not found any stellar companions to LP 71-82 as in 2014.[7]
Physical properties
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.[8]
References
- Mt. Suhora Survey – Searching for Pulsating M Dwarfs. III
- The CARMENES search for exoplanets around M dwarfs High-resolution optical and near-infrared spectroscopy of 324 survey stars, 2017, arXiv:1711.06576
- Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- Persistent starspot signals on M dwarfs: multi-wavelength Doppler observations with the Habitable-zone Planet Finder and Keck/HIRES, 2020, arXiv:2005.09657
- A Catalog of M-dwarf Flares with ASAS-SN, 2019, arXiv:1912.05549
- Reliable probabilistic determination of membership in stellar kinematic groups in the young disk, Table 4
- The AstraLux Multiplicity Survey: Extension to Late M-dwarfs, 2014, arXiv:1406.0535
- Magnetic fields in M dwarfs from the CARMENES survey, 2019, arXiv:1904.12762
Constellation of Draco |
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