Gliese 146

Gliese 146 is a K5V class star located in the constellation Horologium. At 44.4 light years, GJ 146 has an apparent magnitude of +8.57. Gliese 146 is also known as HD 22496, HIP 16711, SAO-216392, and LHS 1563.[9]

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, LTT 1698, SAO 85397, 2MASS J03350093-4825089[4]
Database references
SIMBADdata
ARICNSdata

Its speed 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 is a suspected variable star.[4][5] It belongs to the Hyades supercluster of stars[10] It is one of 155 K-type stars within 50 light years.[9]

Gliese 146 is a flare star, with average flare frequency 0.23 flares per day.[11]

Planetary system

It is one of 500 stars selected in 2009 for the SCUBA-2 All Sky Survey for stars with debris disks.[12] The debris disk was not detected by any survey as in 2015 though.[7]

In 2021, a Sub-Neptune planet HD 22496b was discovered utilizing a Doppler spectroscopy method.[6]

The HD 22496 planetary system[6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >5.57+0.73
−0.68, <16 M🜨		 0.0510+0.0024
−0.0026		 5.09071 ± 0.00026 0 — —

See also

References
  1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
  3. Gray, R.O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
  4. "HD 22496 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2016-06-21
  5. VizieR Detailed Page for NSV=1203
  6. Lillo-Box, J.; et al. (2021), "HD 22496 b: The first ESPRESSO stand-alone planet discovery", Astronomy & Astrophysics, 654: A60, arXiv:2109.00226, doi:10.1051/0004-6361/202141714, S2CID 237371680
  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, doi:10.1088/0004-637X/801/2/143, S2CID 55170390
  8. Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal, 143 (6): 135, arXiv:1203.1966, Bibcode:2012AJ....143..135V, doi:10.1088/0004-6256/143/6/135, S2CID 118539505.
  9. K stars within 100 light-years - SolStation.com
  10. siblings of HD 22496 (SIMBAD)
  11. 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, doi:10.1093/mnras/staa504
  12. N. M. Phillips, J. S. Greaves, W. R. F. Dent, B. C. Matthews, W. S. Holland, M. C. Wyatt, B. Sibthorpe Target selection for the SUNS and DEBRIS surveys for debris discs in the solar neighbourhood
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