Y Tauri

Not to be confused with Upsilon Tauri.
Y Tauri
Location of Y Tauri (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 05h 45m 39.4101s[1]
Declination +20° 41′ 42.149″[1]
Apparent magnitude (V) 6.5 - 9.2[2]
Characteristics
Evolutionary stage AGB[3][4]
Spectral type C6.5,4e(N3)[2]
Variable type SRb[2]
Astrometry
Radial velocity (Rv)17.00[5] km/s
Proper motion (μ) RA: 0.039[1] mas/yr
Dec.: −4.532[1] mas/yr
Parallax (π)1.5006 ± 0.0592 mas[1]
Distance2,170 ± 90 ly
(670 ± 30 pc)
Absolute magnitude (MV)−1.1 (near max.)[6]
Details
Mass4.3[7] M☉
Radius219[8] R☉
Luminosity6,025[4] L☉
Surface gravity (log g)0.228[7] cgs
Temperature3,217[9] K
Metallicity [Fe/H]−0.106[7] dex
Other designations
Y Tau, BD+20°1083, HD 38307, HIP 27181, HR 1977
Database references
SIMBADdata

Y Tauri is a carbon star located in the constellation Taurus. Parallax measurements by Gaia put it at a distance of approximately 2,170 light-years (670 parsecs).[1]

A visual band light curve for Y Tauri, plotted from ASAS data[10]

Y Tauri is a semiregular variable star. Its class is SRb, and its primary pulsation cycle lasts 241.5 days.[2] No long secondary period has been identified.[11] It has a radius of 219 R☉, an effective surface temperature of 3,217 K, and a bolometric luminosity of 4,489 L☉. Its mass is calculated to be 4.3 M☉.

Y Tauri is losing mass at 4×10−7 M☉/yr, and is surrounded by dust at a temperature of 1,900 K.[3]

  1. ^ a b c d e f Cite error: The named reference edr3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference gcvs was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference vdes2021 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference guandalini2013 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference pulkovo was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference gontcharov2011 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference starhorse was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference tic was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference chandler2016 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference ASASServer was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference olivier2003 was invoked but never defined (see the help page).