18130+3318 COU1006

 
 
18H 12M 58.00S +33 17' 53.9" P.A. 262.4 SEP 0.33 MAG 9.23,11.29 SP G0 DIST. 69.44 PC (226.51 L.Y.)
 
 
Coord 2000
18130+3318
Discov num
COU1006
Comp
Coord arcsec 2000
18 12 58.00 +33 17 53.9
Date first
1973
Date last
2009
Obs
15
Pa first
193
Pa last
320
P.A. Now (θ)
262.4°
Sep first
0.5
Sep last
0.4
Sep. Now (ρ)
0.33"
Mag pri
9.23
Mag sec
11.29
delta mag (ΔM)
2.06
Spectral class
G0 (yellow)
Pri motion ra
+125
Sec motion ra
Pri motion dec
-015
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
66759
HIP
89268
Tycho2
2626-01393-1
BD
BD+33 3050
Distance
69.44
Distance ly
226.51
last precise pa
320.2
last precise sep
0.43
 
 
ORBITAL ELEMENTS
 
 
Period (P)119.2y Periastron (T)2007.66y Semi-major axis (a)0.48a
Eccentricity (e)0.55 Inclination (i)43° Longitude of periastron (ω)65°
Node (Ω)100° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.293 91.9
2001 0.279 97.1
2002 0.264 102.8
2003 0.248 109.3
2004 0.230 116.8
2005 0.212 125.5
2006 0.194 135.8
2007 0.178 148.2
2008 0.167 162.6
2009 0.162 178.5
2010 0.165 194.5
2011 0.176 209.2
2012 0.193 221.8
2013 0.214 232.1
2014 0.236 240.5
2015 0.260 247.4
2016 0.283 253.2
2017 0.305 258.1
2018 0.327 262.4
2019 0.348 266.1
2020 0.368 269.5
2021 0.386 272.4
2022 0.404 275.2
2023 0.420 277.7
2024 0.436 280.0
2025 0.451 282.1
2026 0.464 284.2
2027 0.477 286.1
2028 0.489 287.9
2029 0.501 289.6
2030 0.511 291.3

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