LP 816-60

Last updated
LP 816-60
Observation data
Epoch J2000        Equinox J2000
Constellation Capricornus
Right ascension 20h 52m 33.01679s [1]
Declination −16° 58 29.0249 [1]
Apparent magnitude  (V)11.458 [2]
Characteristics
Spectral type M4 [3]
Astrometry
Radial velocity (Rv)8.5 [4]  km/s
Proper motion (μ)RA: -309.115  mas/yr [5]
Dec.: 37.051  mas/yr [5]
Parallax (π)177.9312 ± 0.0365  mas [5]
Distance 18.330 ± 0.004  ly
(5.620 ± 0.001  pc)
Details [6]
Mass 0.224±0.022  M
Radius 0.266±0.012  R
Surface gravity (log g)4.584 [7]   cgs
Temperature 3030±27 [8]   K
Metallicity [Fe/H]-0.11±0.07 [8]   dex
Rotation 67.6±0.1 d. [9]
Rotational velocity (v sin i)2.70±0.66 [7]  km/s
Age 2.57+8.15
1.95
  Gyr
Other designations
HIP  103039 [1] , LP  816-60, NLTT  50038 [10] , TYC  6348-400-1 [11] , 2MASS J20523304-1658289
Database references
SIMBAD data
Capricornus constellation map.svg
Red pog.png
LP 816-60
Location of LP 816-60 in the constellation Capricornus

LP 816-60 is a single [3] red dwarf star of spectral type M4, located in constellation Capricornus at 18.6 light-years from Earth. [1]

The discovery name of this star is LP 816-60, [12] which indicates that its discovery was published between 1963 and 1981 in University of Minnesota, Minneapolis. [13] LP 816-60 is known at least from 1979, when it was included to Luyten's catalogue NLTT. [10]

No massive planets were detected around LP 816-60 as in 2013. [3] The star has a magnetic starspot cycle of 10.6±1.7 years, [9] and weak magnetic fields in chromosphere averaging 4.4 G. [14]

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References

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  2. Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society . 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi: 10.1111/j.1365-2966.2009.16182.x .
  3. 1 2 3 Montet, Benjamin T.; Crepp, Justin R.; Johnson, John Asher; Howard, Andrew W.; Marcy, Geoffrey W. (2013), "The Trends High-Contrast Imaging Survey. Iv. The Occurrence Rate of Giant Planets Around M Dwarfs", The Astrophysical Journal, 781: 28, arXiv: 1307.5849 , doi:10.1088/0004-637X/781/1/28, S2CID   26620552
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  9. 1 2 Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I. (2016), "Magnetic cycles and rotation periods of late-type stars from photometric time series", Astronomy & Astrophysics, 595: A12, arXiv: 1607.03049 , Bibcode:2016A&A...595A..12S, doi:10.1051/0004-6361/201628586, S2CID   118555782
  10. 1 2 Luyten, Willem Jacob (1979). "NLTT 50038". NLTT Catalogue.
  11. Perryman; et al. (1997). "HIP 103039". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-29.
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