71 Tauri

71 Tauri

A light curve for V777 Tauri, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 04h 26m 20.77302s[2]
Declination +15° 37′ 05.7885″[2]
Apparent magnitude (V) +4.48[3]
Characteristics
Spectral type F0 V[4]
U−B color index +0.13[3]
B−V color index +0.25[3]
Variable type δ Sct[5]
Astrometry
Radial velocity (Rv)+38.3[6] km/s
Proper motion (μ) RA: +85.393[2] mas/yr
Dec.: −14.869[2] mas/yr
Parallax (π)22.4141 ± 0.4969 mas[2]
Distance146 ± 3 ly
(44.6 ± 1.0 pc)
Absolute magnitude (MV)1.10[7]
Details
Mass1.94[7] M☉
Radius3.34[4] R☉
Surface gravity (log g)3.73[8] cgs
Temperature7,543[4] K
Rotation14.2[7] d
Rotational velocity (v sin i)192[7] km/s
Age966[8] Myr
Other designations
71 Tau, V777 Tau, BD+15°625, GC 5375, HD 28052, HIP 20713, HR 1394, SAO 93932[9]
Database references
SIMBADdata

71 Tauri is a suspected triple star[10] system in the zodiac constellation Taurus, located 146 light years from the Sun.[2] It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of +4.48.[3] The star is moving further away from the Earth with a heliocentric radial velocity of +38 km/s.[6] It is a member of the Hyades open cluster.[11]

The primary component is an F-type main-sequence star with a stellar classification of F0 V.[4] It is a Delta Scuti variable with an amplitude of 0.02 in magnitude and a frequency of 0.16 d−1.[5] This star has about 1.94[7] times the mass of the Sun and 3.34[4] times the Sun's radius. It has a projected rotational velocity of 192 km s−1, for an estimated rotation period of 14.2 days.[7] Extreme ultraviolet flares have been observed coming from this star's hot corona,[4] and it is the second brightest X-ray source in the Hyades.[11]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Mullan2000 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference aaa361_614 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Simon2000 was invoked but never defined (see the help page).