18092+3129 COU 812

 
 
18h 09m 09.93s +31 29' 10.5" P.A. 287.2 sep 0.68 mag 10.77,10.85 Sp G0
 
 
Coord 2000
18092+3129
Discov num
COU 812
Comp
Coord arcsec 2000
18 09 09.93 +31 29 10.5
Date first
1972
Date last
2016
Obs
12
Pa first
235
Pa last
264
P.A. Now (θ)
287.2°
Sep first
0.5
Sep last
0.7
Sep. Now (ρ)
0.68"
Mag pri
10.77
Mag sec
10.85
delta mag (ΔM)
0.08
Spectral class
G0 (yellow)
Pri motion ra
+029
Sec motion ra
+029
Pri motion dec
+009
Sec motion dec
+009
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
264.2
Precise sep
0.69
Constellation
Hercules
Tycho2
2622-01551-1
last precise pa
264.2
last precise sep
0.69
 
 
ORBITAL ELEMENTS
 
 
Period (P)173.33y Periastron (T)1950.72y Semi-major axis (a)0.57a
Eccentricity (e)0.5 Inclination (i)40° Longitude of periastron (ω)77.8°
Node (Ω)53° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.656 270.2
2001 0.659 271.3
2002 0.661 272.3
2003 0.663 273.3
2004 0.665 274.3
2005 0.667 275.3
2006 0.669 276.3
2007 0.670 277.3
2008 0.672 278.3
2009 0.673 279.3
2010 0.674 280.3
2011 0.675 281.3
2012 0.676 282.3
2013 0.676 283.3
2014 0.677 284.2
2015 0.678 285.2
2016 0.678 286.2
2017 0.678 287.2
2018 0.678 288.1
2019 0.678 289.1
2020 0.678 290.1
2021 0.678 291.1
2022 0.678 292.0
2023 0.678 293.0
2024 0.677 294.0
2025 0.677 295.0
2026 0.676 295.9
2027 0.676 296.9
2028 0.675 297.9
2029 0.674 298.9
2030 0.673 299.9

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

grafico orbita





wds18092%2B3129a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18092+3129 COU 812 1997 7 252 0.5 10.77 10.85 G0 O 180909.93+312910.5
18092+3129 COU 812 2010 8 261 0.6 10.77 10.85 G0 O 180909.93+312910.5
18092+3129 COU 812 2016 12 264 0.7 10.77 10.85 G0 O 180909.93+312910.5

If you need more information about this double, apply for a data request form to the WDS.