13320+3108 WOR  24

 
 
13H 31M 58.34S +31 08' 04.4" P.A. 26.7 SEP 0.4 MAG 11.14,11.37 SP M0V DIST. 32.01 PC (104.42 L.Y.)
 
 
Coord 2000
13320+3108
Discov num
WOR  24
Comp
Coord arcsec 2000
13 31 58.34 +31 08 04.4
Date first
1960
Date last
2008
Obs
34
Pa first
353
Pa last
126
P.A. Now (θ)
26.7°
Sep first
0.4
Sep last
0.1
Sep. Now (ρ)
0.4"
Mag pri
11.14
Mag sec
11.37
delta mag (ΔM)
0.23
Spectral class
M0V (red)
Pri motion ra
-139
Sec motion ra
Pri motion dec
+040
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Canes Venatici
HIP
66008
Tycho2
2536-01075-1
GL
Wo 9448A
BD
BD+31 2500
Distance
32.01
Distance ly
104.42
last precise pa
125.5
last precise sep
0.134
 
 
ORBITAL ELEMENTS
 
 
Period (P)21.18y± 0.3 Periastron (T)1986.02y± 0.01 Semi-major axis (a)0.271a± 0.002
Eccentricity (e)0.634± 0.003 Inclination (i)153.4°± 4 Longitude of periastron (ω)257.5°± 2.5
Node (Ω)103.9°± 3 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.367 8.2
2001 0.347 1.5
2002 0.323 353.8
2003 0.292 344.7
2004 0.255 333.2
2005 0.210 317.2
2006 0.153 290.7
2007 0.094 228.7
2008 0.123 138.0
2009 0.193 102.0
2010 0.249 84.2
2011 0.292 72.4
2012 0.326 63.4
2013 0.352 55.9
2014 0.371 49.3
2015 0.385 43.3
2016 0.394 37.6
2017 0.398 32.1
2018 0.398 26.7
2019 0.393 21.2
2020 0.384 15.4
2021 0.370 9.4
2022 0.351 2.7
2023 0.328 355.3
2024 0.298 346.4
2025 0.263 335.5
2026 0.219 320.5
2027 0.165 296.8
2028 0.102 245.0
2029 0.111 149.3
2030 0.181 106.5

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