03272+0944 HDS 433 AB (Xi Tau)

03h 27m 10.12s +09° 43' 58.0" P.A. 267.00 sep 0.6 mag 3.74,7.55 Sp B9Vn dist. 64.1 pc (209.09 l.y.)

Coord 2000 03272+0944 Discov num HDS 433 Comp AB Coord arcsec 2000 03 27 10.12 +09 43 58.0
Date first 1983 Date last 2021 Obs 21
Pa first 298 Pa last 266.6 P.A. Now (θ) 271.3°
Sep first 0.7 Sep last 0.577 Sep. Now (ρ) 0.589"
Mag pri 3.74 Mag sec 7.55 delta mag (ΔM) 3.81 Spectral class B9Vn (blue-white)
Pri motion ra +054 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



03272+0944 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 111195 03 27 10 +09 43 58 MKT 15 Aa,Ab 2013 31 337 0.0 4.79 4.25 0.54 Y
Show Xi Tau 111195 03 27 10 +09 43 58 HDS 433 AB 2021 21 267 0.6 3.74 7.55 3.81 Y <===


Triple system
2 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name Xi Tau Constellation Taurus SAO 111195 HIP 16083
Tycho2 0650-01469-1 Gaia DR2 12730974555930624 HD 21364 HR 1038
GC 4107 BD BD+09 439 Bayer Xi Tauri Bayer name Xi Tau
Flamsteed 2 Tauri Flamsteed name 2 Tau FK5 123 Distance 64.1
Distance ly 209.09 Bayer greek ξ Tau




ORBITAL ELEMENTS

Period (P)50.81y± 0.62 Periastron (T)2008.43y± 0.04 Semi-major axis (a)0.439a± 0.004
Eccentricity (e)0.571± 0.004 Inclination (i)26.7°± 1.2 Longitude of periastron (ω)± 2.9
Node (Ω)109.4°± 2.9 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 347.8 0.413
2001 354.2 0.381
2002 1.8 0.347
2003 11.0 0.313
2004 22.5 0.279
2005 37.0 0.248
2006 55.4 0.221
2007 78.1 0.201
2008 104.5 0.190
2009 132.8 0.188
2010 160.1 0.197
2011 183.5 0.219
2012 201.9 0.250
2013 215.9 0.286
2014 226.7 0.324
2015 235.3 0.361
2016 242.3 0.397
2017 248.2 0.431
2018 253.2 0.463
2019 257.6 0.492
2020 261.5 0.520
2021 265.0 0.545
2022 268.3 0.568
2023 271.3 0.589
2024 274.1 0.607
2025 276.7 0.624
2026 279.2 0.639
2027 281.6 0.651
2028 283.9 0.662
2029 286.2 0.671
2030 288.4 0.678


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds03272%2B0944b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic