Kappa Tauri

Kappa Tauri
Observation data
Epoch J2000.0      Equinox
Constellation Taurus
κ1 Tau
Right ascension 04h 25m 22.16505s[1]
Declination +22° 17′ 37.9375″[1]
Apparent magnitude (V) +4.22[2]
κ2 Tau
Right ascension 04h 25m 25.01518s[1]
Declination +22° 11′ 59.9876″[1]
Apparent magnitude (V) +5.24[2]
Characteristics
κ1 Tau
Spectral type A7IV-V[3]
U−B color index +0.12[2]
B−V color index +0.14[2]
κ2 Tau
Spectral type A7V
U−B color index +0.09[2]
B−V color index +0.17[2]
Astrometry
κ1 Tau
Radial velocity (Rv)+37.30[4] km/s
Proper motion (μ) RA: +105.10[1] mas/yr
Dec.: −45.04[1] mas/yr
Parallax (π)21.19 ± 0.21 mas[1]
Distance154 ± 2 ly
(47.2 ± 0.5 pc)
Absolute magnitude (MV)+0.96[5]
κ2 Tau
Radial velocity (Rv)+32.00[6] km/s
Proper motion (μ) RA: +111.97[1] mas/yr
Dec.: −47.71[1] mas/yr
Parallax (π)22.03 ± 0.35 mas[1]
Distance148 ± 2 ly
(45.4 ± 0.7 pc)
Absolute magnitude (MV)+2.18[5]
Details
κ1 Tau
Radius2.60[7] R☉
Luminosity33.6[8] L☉
Temperature9,000[7] K
Rotational velocity (v sin i)94[9] km/s
κ2 Tau
Luminosity11.8[8] L☉
Temperature7,400[8] K
Rotational velocity (v sin i)191[9] km/s
Other designations
κ Tau, ADS 3201
κ1 Tau: 65 Tauri, BD+21 642, HD 27934, HIP 20635, HR 1387, SAO 76601.[10]
κ2 Tau: 67 Tauri, BD+21 643, HD 27946, HIP 20641, HR 1388, SAO 76602.[11]
Database references
SIMBADκ1 Tau
κ2 Tau

Kappa Tauri (κ Tau, κ Tauri) is a double star in the constellation Taurus, the two components κ1 Tauri and κ2 Tauri both members of the Hyades open cluster. The pair are approximately 150 light years from Earth and are separated from each other by about six light years.

  1. ^ a b c d e f g h i j Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference aj74_375 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference al31_11_759 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Eggen1998 was invoked but never defined (see the help page).
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  7. ^ a b Cite error: The named reference apj660_2_1556 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference mnras427_1_343 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference simbad1 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference simbad2 was invoked but never defined (see the help page).