HD 29697

HD 29697
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 41m 18.85634s[1]
Declination +20° 54 05.4456[1]
Apparent magnitude (V) 8.00[2]
Spectral type K3 V[3]
U−B color index +0.94[2]
B−V color index +1.09[2]
Variable type BY Dra[4]
Radial velocity (Rv)+11[5] km/s
Proper motion (μ) RA: −232.38±1.05[1] mas/yr
Dec.: −254.28±0.69[1] mas/yr
Parallax (π)75.82 ± 1.14[1] mas
Distance43.0 ± 0.6 ly
(13.2 ± 0.2 pc)
Mass0.75[6] M
Radius0.67[6] R
Luminosity0.15[6] L
Surface gravity (log g)4.50[4] cgs
Temperature4,454±11.4[7] K
Metallicity [Fe/H]0.01[4] dex
Rotational velocity (v sin i)9.73[4] km/s
Age49±37[6] Myr
Other designations
V834 Tau, BD+20° 802, GJ 174, HD 29697, HIP 21818, SAO 76708.

HD 29697 or V834 Tauri is a variable star of the BY Draconis[4] type in the equatorial constellation of Taurus. It has an apparent magnitude of 8.0,[2] so it is not visible to the naked eye. The star has been examined for indications of a circumstellar disk using the Spitzer Space Telescope, but no statistically-significant infrared excess was detected.[6]


  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
  2. 1 2 3 4 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
  3. Montes, D.; et al. (2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537Freely accessible, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x
  4. 1 2 3 4 5 Mishenina, T. V.; et al. (November 2012), "Activity and the Li abundances in the FGK dwarfs", Astronomy & Astrophysics, 547: 8, arXiv:1210.6843Freely accessible, Bibcode:2012A&A...547A.106M, doi:10.1051/0004-6361/201118412, A106
  5. Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E
  6. 1 2 3 4 5 Plavchan, Peter; et al. (June 2009), "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope", The Astrophysical Journal, 698 (2): 1068–1094, arXiv:0904.0819Freely accessible, Bibcode:2009ApJ...698.1068P, doi:10.1088/0004-637X/698/2/1068
  7. Kovtyukh, V. V.; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429Freely accessible, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378

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