Gliese 367

Gliese 367 / Añañuca
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 09h 44m 29.83677s[1]
Declination −45° 46′ 35.4276″[1]
Apparent magnitude (V) 10.153±0.044[2]
Characteristics
Evolutionary stage Main sequence
Spectral type M1.0V[2]
Astrometry
Radial velocity (Rv)47.42±0.14[1] km/s
Proper motion (μ) RA: −462.621(14) mas/yr[1]
Dec.: −582.668(15) mas/yr[1]
Parallax (π)106.1727 ± 0.0141 mas[1]
Distance30.719 ± 0.004 ly
(9.419 ± 0.001 pc)
Details[2]
Mass0.454±0.011 M☉
Radius0.457±0.013 R☉
Luminosity0.0288±0.0027 L☉
Surface gravity (log g)4.777±0.026 cgs
Temperature3522±70 K
Metallicity [Fe/H]−0.01±0.12 dex
Rotation48±2 d
Rotational velocity (v sin i)0.48±0.02 km/s
Age8.0+3.8
−4.6,[2] 0.057+0.003
−0.002[3] Gyr
Other designations
Añañuca, CD−45 5378, GJ 367, HIP 47780, TOI-731, TIC 34068865, TYC 8168-2031-1, 2MASS J09442986-4546351[4]
Database references
SIMBADdata

Gliese 367 (GJ 367, formally named Añañuca[5]) is a red dwarf star 30.7 light-years (9.4 parsecs) from Earth in the constellation of Vela. It is suspected to be a variable with amplitude 0.012 stellar magnitude and period 5.16 years.[6] A stellar multiplicity survey in 2015 failed to detect any stellar companions to Gliese 367.[7] It hosts three known exoplanets, Gliese 367 b, c & d.[8]

Gliese 367's age is unclear. Modelling using stellar isochrones gives a young age of less than 60 million years old, but its orbit around the Milky Way is highly eccentric, unusual for a young star.[3] It may have been forced into such an orbit via a gravitational encounter.[3] Spectroscopic evidence presented in a 2023 study supports an old age for Gliese 367.[8]: 6 

  1. ^ a b c d e Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Lam2021 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Brandner was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference NEW2022 was invoked but never defined (see the help page).
  6. ^ Hosey, Altonio D.; Henry, Todd J.; Jao, Wei-Chun; Dieterich, Sergio B.; Winters, Jennifer G.; Lurie, John C.; Riedel, Adric R.; Subasavage, John P. (2015). "The Solar Neighborhood XXXVI. The Long-Term Photometric Variability of Nearby Red Dwarfs in the V RI Optical Bands". The Astronomical Journal. 150 (1): 6. arXiv:1503.02100. Bibcode:2015AJ....150....6H. doi:10.1088/0004-6256/150/1/6. S2CID 13913564.
  7. ^ Ward-Duong, K.; Patience, J.; De Rosa, R. J.; Bulger, J.; Rajan, A.; Goodwin, S. P.; Parker, Richard J.; McCarthy, D. W.; Kulesa, C. (2015). "The M-dwarfs in Multiples (Min Ms) survey – I. Stellar multiplicity among low-mass stars within 15 pc★". Monthly Notices of the Royal Astronomical Society. 449 (3): 2618–2637. arXiv:1503.00724. Bibcode:2015MNRAS.449.2618W. doi:10.1093/mnras/stv384.
  8. ^ a b Cite error: The named reference Goffo2023 was invoked but never defined (see the help page).