03272+0944 HDS 433 (Xi Tau)

 
 
03H 27M 10.12S +09 43' 58.0" P.A. 248.2 SEP 0.43 MAG 3.74,7.55 SP B9VN DIST. 64.1 PC (209.09 L.Y.)
 
 
Coord 2000
03272+0944
Discov num
HDS 433
Comp
Coord arcsec 2000
03 27 10.12 +09 43 58.0
Date first
1983
Date last
2014
Obs
17
Pa first
298
Pa last
234
P.A. Now (θ)
248.2°
Sep first
0.7
Sep last
0.4
Sep. Now (ρ)
0.43"
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.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Xi Tau
Constellation
Taurus
SAO
111195
HIP
16083
HD
21364
HR
1038
GC
4107
BD
BD+09 439
Bayer
Xi Tauri
Bayer name
Xi Tau
Flamsteed
2 Tauri
Flamsteed name
2 Tau
Distance
64.1
Distance ly
209.09
last precise pa
234.4
last precise sep
0.35
 
 
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 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.413 347.8
2001 0.381 354.2
2002 0.347 1.8
2003 0.313 11.0
2004 0.279 22.5
2005 0.248 37.0
2006 0.221 55.4
2007 0.201 78.1
2008 0.190 104.5
2009 0.188 132.8
2010 0.197 160.1
2011 0.219 183.5
2012 0.250 201.9
2013 0.286 215.9
2014 0.324 226.7
2015 0.361 235.3
2016 0.397 242.3
2017 0.431 248.2
2018 0.463 253.2
2019 0.492 257.6
2020 0.520 261.5
2021 0.545 265.0
2022 0.568 268.3
2023 0.589 271.3
2024 0.607 274.1
2025 0.624 276.7
2026 0.639 279.2
2027 0.651 281.6
2028 0.662 283.9
2029 0.671 286.2
2030 0.678 288.4

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic