12316+3201 COU 966

 
 
12H 31M 35.73S +32 01' 22.5" P.A. 351.8 SEP 0.13 MAG 10.18,10.99 SP F8 DIST. 303.03 PC (988.48 L.Y.)
 
 
Coord 2000
12316+3201
Discov num
COU 966
Comp
Coord arcsec 2000
12 31 35.73 +32 01 22.5
Date first
1973
Date last
2008
Obs
16
Pa first
101
Pa last
28
P.A. Now (θ)
351.8°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.13"
Mag pri
10.18
Mag sec
10.99
delta mag (ΔM)
0.81
Spectral class
F8 (yellow-white)
Pri motion ra
+012
Sec motion ra
Pri motion dec
-003
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
28.3
Precise sep
0.264
Constellation
Canes Venatici
HIP
61124
Tycho2
2528-01773-1
BD
BD+32 2254
Distance
303.03
Distance ly
988.48
last precise pa
28.3
last precise sep
0.264
 
 
ORBITAL ELEMENTS
 
 
Period (P)90.43y Periastron (T)2036.13y Semi-major axis (a)0.126a
Eccentricity (e)0.304 Inclination (i)172.4° Longitude of periastron (ω)183°
Node (Ω)63.6° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation1997
label rho theta
2000 0.160 40.1
2001 0.159 37.8
2002 0.157 35.4
2003 0.156 33.0
2004 0.155 30.5
2005 0.153 28.0
2006 0.151 25.4
2007 0.150 22.8
2008 0.148 20.1
2009 0.146 17.3
2010 0.144 14.5
2011 0.142 11.5
2012 0.140 8.5
2013 0.137 5.4
2014 0.135 2.2
2015 0.132 358.9
2016 0.130 355.4
2017 0.127 351.8
2018 0.125 348.0
2019 0.122 344.1
2020 0.119 340.0
2021 0.116 335.7
2022 0.114 331.2
2023 0.111 326.5
2024 0.108 321.5
2025 0.106 316.3
2026 0.103 310.8
2027 0.100 305.0
2028 0.098 299.0
2029 0.096 292.6
2030 0.094 286.0

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