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HD 63433

HD 63433

A light curve for V377 Geminorum, plotted from TESS data,[1] with the 6.46 day rotation period shown in red,
Observation data
Epoch J2000      Equinox J2000
Constellation Gemini[note 1]
Right ascension 07h 49m 55.05s[2]
Declination 27° 21′ 47.45″[2]
Apparent magnitude (V) 6.92[3]
Characteristics
Evolutionary stage Main sequence[4]
Spectral type G5V[4]
Variable type BY Draconis[5][6]
Astrometry
Radial velocity (Rv)−16.07±0.13[3] km/s
Proper motion (μ) RA: −10.0268±0.0846 mas/yr[3]
Dec.: −11.3143±0.0487 mas/yr[3]
Parallax (π)44.6848 mas[7]
Distance73.035±0.073 ly
(22.4035±0.0225 pc)[3]
Absolute magnitude (MV)5.19[8]
Details[9]
Mass0.99±0.03 M☉
Radius0.912±0.034 R☉
Luminosity0.753±0.026 L☉
Surface gravity (log g)4.52±0.05[4] cgs
Temperature5640±74 K
Metallicity [Fe/H]0.03±0.05[4] dex
Rotation6.45±0.05 d
Rotational velocity (v sin i)7.3±0.3 km/s
Age414±23 Myr
Other designations
V377 Gem, BD+27°1490, HD 63433, HIP 38228, SAO 79729, PPM 98012, TOI-1726, TYC 1933-747-1, GSC 01933-00747, 2MASS J07495506+2721473[10]
Database references
SIMBADdata

HD 63433 (TOI-1726, V377 Geminorum) is a G-type main sequence star located 73 light-years from Earth in the zodiacal constellation Gemini,[9][note 1] visually close to the star Pollux.[7] It has nearly the same radius and mass of the Sun, hence being classified as a Sun-like star.[9] However, it is much younger than the Sun, less than one tenth as old with an age of about 400 million years.[9][a] With an apparent magnitude of 6.9, it is not visible to the naked eye, but can be seen with a small telescope[12] or binoculars.[13] Based on its kinematic, rotational and lithium abundance properties, it is part of the Ursa Major Moving Group.[9] There are three exoplanets orbiting it, one is classified as an Earth-sized planet, while the two others are mini-Neptunes.[4]

  1. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 19 March 2023.
  2. ^ a b 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.
  3. ^ a b c d Cite error: The named reference NASA was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference :0 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference :9 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference :11 was invoked but never defined (see the help page).
  7. ^ a b c "HD 63433". simbad.cds.unistra.fr. Retrieved 2024-01-11.
  8. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  9. ^ a b c d e Cite error: The named reference :5 was invoked but never defined (see the help page).
  10. ^ "HD 63433". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-01-23.
  11. ^ Cite error: The named reference Bonanno was invoked but never defined (see the help page).
  12. ^ "★ HD 63433". Stellar Catalog. Retrieved 2024-01-11.
  13. ^ Macrobert, Alan. "Binoculars: Halfway to a Telescope". Sky & Telescope. American Astronomical Society. Retrieved 11 May 2024.


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