HD 63765

"Yvaga" redirects here. For the fictional planet, see Alien: Romulus.
HD 63765 / Tapecue
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 07h 47m 49.720s[1]
Declination −54° 15′ 50.92″[1]
Apparent magnitude (V) 8.10[2]
Characteristics
Spectral type G9V[3]
Apparent magnitude (B) 8.845[2]
Apparent magnitude (J) 6.768±0.024[2]
Apparent magnitude (H) 6.442±0.027[2]
Apparent magnitude (K) 6.316±0.021[2]
B−V color index 0.745±0.012[2]
Astrometry
Radial velocity (Rv)22.1±0.2[2] km/s
Proper motion (μ) RA: 148.628 mas/yr[1]
Dec.: −278.753 mas/yr[1]
Parallax (π)30.7532 ± 0.0176 mas[1]
Distance106.06 ± 0.06 ly
(32.52 ± 0.02 pc)
Absolute magnitude (MV)5.49[2]
Details
Mass0.85±0.03[4] M☉
Radius0.84±0.02[4] R☉
Luminosity0.58±0.01[4] L☉
Surface gravity (log g)4.51±0.04[4] cgs
Temperature5,483±421[4] K
Metallicity [Fe/H]−0.16[5] dex
Rotation26.7±6.7 d[5]
Age7.2±3.6[4] Gyr
Other designations
CD−53°2007, HD 63765, HIP 38041, SAO 235521, PPM 336398, LTT 2952, NLTT 18486[6]
Database references
SIMBADdata
Exoplanet Archivedata

HD 63765 is a star with an orbiting exoplanet in the southern constellation of Carina. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 8.10.[2] The distance to this system is 106 light years based on parallax measurements, and it is drifting further away with a heliocentric radial velocity of 22 km/s.[2]

The star HD 63765 has the proper name Tapecue. The name was selected by Bolivia during the 100th anniversary of the IAU as part of the IAU's NameExoWorlds project. Tapecue (modern Tapekue), literally 'eternal path' in Guarani, is the Milky Way through which the first inhabitants of the Earth arrived and could return. The planet HD 63765 b is named Yvaga. Yvága means 'sky' or 'heaven' in Guarani and the Milky Way was known as the road to yvága.[7][8]

This is an ordinary G-type main-sequence star with a stellar classification of G9V.[3] It has 84% of the radius of the Sun and 85% of the Sun's mass.[4] The star is roughly seven billion[4] years old and is spinning with a rotation period of around 27 days.[5] It is considered to have a moderate level of magnetic activity in its chromosphere.[9] HD 63765 has lower iron abundance with approximately 69% of the Sun's iron-to-hydrogen ratio.[5] It is radiating 58% of the luminosity of the Sun from its photosphere at an effective temperature of 5,483 K.[4]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h i Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference mnras452_3_2745 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference IAU was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference exoworlds was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Ségransan2011 was invoked but never defined (see the help page).