5 Tauri

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5 Tauri
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 03h 30m 52.37792s[1]
Declination +12° 56′ 12.0365″[1]
Apparent magnitude (V) +4.14[2]
Characteristics
Spectral type K0II-III
U−B color index +0.95[3]
B−V color index +1.09[3]
Astrometry
Radial velocity (Rv) 14.20 km/s
Proper motion (μ) RA: 18.25[1] mas/yr
Dec.: -1.92[1] mas/yr
Parallax (π) 9.53 ± 0.43[1] mas
Distance 340 ± 20 ly
(105 ± 5 pc)
Orbit[4]
Primary 5 Tauri A
Companion 5 Tauri B
Period (P) 960 days
Semi-major axis (a) 4.25 mas
Eccentricity (e) 0.397
Inclination (i) 36.95°
Longitude of the node (Ω) 207.61°
Periastron epoch (T) 2447546.5703
Argument of periastron (ω)
(secondary)
326.32°
Details
5 Tauri A
Mass 4.0+0.7
−0.7
[5] M
Luminosity 4644[2] L
Rotational velocity (v sin i) 10[2] km/s
5 Tauri B
Mass 1.13±0.13 M
Other designations
f Tauri, HR 1066, HD 21754, BD+12 486, FK5 125, HIP 16369, SAO 93469, GC 4184, TYC 656-1725-1
Database references
SIMBAD data

5 Tauri (5 Tau) is a star in the constellation Taurus. 5 Tauri is an orange K-type giant with an apparent magnitude of +4.14. It is approximately 340 light years from Earth.

5 Tauri is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4.

References[edit]

  1. ^ a b c d e 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.  Vizier catalog entry
  2. ^ a b c "5 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2016. 
  3. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  4. ^ ESA (1997). "The Hipparcos and Tycho Catalogues". VizieR On-line Data Catalog. Bibcode:1997yCat.1239....0E. 
  5. ^ Pourbaix, D.; Boffin, H. M. J. (February 2003), "Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component", Astronomy and Astrophysics, 398: 1163–1177, arXiv:astro-ph/0211483Freely accessible, Bibcode:2003A&A...398.1163P, doi:10.1051/0004-6361:20021736 

External links[edit]