Gliese 146

Gliese 146
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Horologium
Right ascension 03h 35m 00.93987s[1]
Declination −48° 25′ 08.9085″[1]
Apparent magnitude (V) 8.64[2]
Characteristics
Evolutionary stage Main Sequence[3]
Spectral type K6.5V[3]
U−B color index +1.24[2]
B−V color index +1.30[2]
Variable type suspected, range 8.57 to 8.7 mag, NSV 1203[4][5]
Astrometry
Radial velocity (Rv)+21.38±0.13[1] km/s
Proper motion (μ) RA: 404.441 mas/yr[1]
Dec.: 307.498 mas/yr[1]
Parallax (π)73.5199 ± 0.0164 mas[1]
Distance44.363 ± 0.010 ly
(13.602 ± 0.003 pc)
Details[6]
Mass0.684±0.013 M☉
Radius0.674±0.020 R☉
Luminosity0.121[7] L☉
Surface gravity (log g)4.69±0.05 cgs
Temperature4385±21 K
Metallicity [Fe/H]-0.08±0.02 dex
Rotation34.99+0.58
−0.53
Age970[8] Myr
Other designations
CD−48° 1011, GJ 146, HD 22496, HIP 16711, SAO 85397, LTT 1698, 2MASS J03350093-4825089[4]
Database references
SIMBADdata
ARICNSdata

Gliese 146 is a star with an orbiting exoplanet in the constellation Horologium. Gliese 146 is also catalogued as HD 22496, HIP 16711, SAO-216392, and LHS 1563.[9] With an apparent visual magnitude of 8.64,[2] it is too faint to be visible to the naked eye. Gliese 146 is located at a distance of 44.4 light years based on parallax measurements, and is drifting further away with a heliocentric radial velocity of +21 km/s.[1]

This is an ordinary K-type main-sequence star with a stellar classification of K6.5V.[3] It has 68% of the mass of the Sun and 67% of the Sun's girth. Gliese 146 is radiating 12% of the luminosity of the Sun from its photosphere at an effective temperature of 4,385 K.[6] Classified as a suspected variable star,[4][5] Gliese 146 was found to be a flare star, with average flare frequency 0.23 flares per day.[10]

Its velocity relative to the Sun is 38.1 km/second, and its galactic orbit ranges between 20,800 and 25,400 light years from the center of the Galaxy, placing it within a thin disk.[6] It belongs to the Hyades supercluster of stars,[11] and is one of 155 K-type stars within 50 light years.[9]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ a b "VizieR Detailed Page for NSV=1203". Archived from the original on 2016-03-04. Retrieved 2013-07-16.
  6. ^ a b c Cite error: The named reference Lillo-Box2021 was invoked but never defined (see the help page).
  7. ^ Moro-Martín, A.; Marshall, J. P.; Kennedy, G.; Sibthorpe, B.; Matthews, B. C.; Eiroa, C.; Wyatt, M. C.; Lestrade, J.-F.; Maldonado, J.; Rodriguez, D.; Greaves, J. S.; Montesinos, B.; Mora, A.; Booth, M.; Duchêne, G.; Wilner, D.; Horner, J. (2015), "Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from Theherscheldebris and Dunes Surveys", The Astrophysical Journal, 801 (2): 143, arXiv:1501.03813, Bibcode:2015ApJ...801..143M, doi:10.1088/0004-637X/801/2/143, S2CID 55170390
  8. ^ Cite error: The named reference Vican2012 was invoked but never defined (see the help page).
  9. ^ a b "K stars within 100 light-years - SolStation.com". Archived from the original on 2017-12-24. Retrieved 2011-07-24.
  10. ^ Lammer, H.; Kővári, Zs; Hanslmeier, A.; Koller, F.; Korhonen, H.; Guenther, E. W.; Kriskovics, L.; Vida, K.; Greimel, R.; Odert, P.; Leitzinger, M. (2020), "A census of coronal mass ejections on solar-like stars", Monthly Notices of the Royal Astronomical Society, 493 (3): 4570–4589, arXiv:2002.04430, Bibcode:2020MNRAS.493.4570L, doi:10.1093/mnras/staa504
  11. ^ "siblings of HD 22496 (SIMBAD)". Archived from the original on 2016-09-13. Retrieved 2013-07-16.