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] |
Distance | 154 ± 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] |
Distance | 148 ± 2 ly (45.4 ± 0.7 pc) |
Absolute magnitude (MV) | +2.18[5] |
Details | |
κ1 Tau | |
Radius | 2.60[7] R☉ |
Luminosity | 33.6[8] L☉ |
Temperature | 9,000[7] K |
Rotational velocity (v sin i) | 94[9] km/s |
κ2 Tau | |
Luminosity | 11.8[8] L☉ |
Temperature | 7,400[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 | |
SIMBAD | κ1 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.
van Leeuwen2007
was invoked but never defined (see the help page).MERMILLIOD
was invoked but never defined (see the help page).aj74_375
was invoked but never defined (see the help page).al31_11_759
was invoked but never defined (see the help page).Eggen1998
was invoked but never defined (see the help page).an328_9_889
was invoked but never defined (see the help page).apj660_2_1556
was invoked but never defined (see the help page).mnras427_1_343
was invoked but never defined (see the help page).aaa463_2_671
was invoked but never defined (see the help page).simbad1
was invoked but never defined (see the help page).simbad2
was invoked but never defined (see the help page).