18035+4032 COU1785

 
 
18h 03m 31.83s +40 32' 00.6" P.A. 36.3 sep 0.17 mag 8.70,8.90 Sp F5
 
 
Coord 2000
18035+4032
Discov num
COU1785
Comp
Coord arcsec 2000
18 03 31.83 +40 32 00.6
Date first
1978
Date last
2007
Obs
19
Pa first
50
Pa last
2
P.A. Now (θ)
36.3°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.17"
Mag pri
8.70
Mag sec
8.90
delta mag (ΔM)
0.2
Spectral class
F5 (yellow-white)
Pri motion ra
-005
Sec motion ra
Pri motion dec
+005
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
1.7
Precise sep
0.084
Constellation
Hercules
SAO
47175
Tycho2
3106-00845-1
HD
165311
last precise pa
1.7
last precise sep
0.084
 
 
ORBITAL ELEMENTS
 
 
Period (P)45.72y± 0.5 Periastron (T)1995y± 0.5 Semi-major axis (a)0.135a± 0.002
Eccentricity (e)0.483± 0.003 Inclination (i)65.7°± 1 Longitude of periastron (ω)147°± 3
Node (Ω)52.8°± 1 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 0.065 268.9
2001 0.060 282.3
2002 0.056 297.8
2003 0.056 314.3
2004 0.060 329.7
2005 0.066 342.9
2006 0.074 353.5
2007 0.084 1.9
2008 0.094 8.5
2009 0.104 13.8
2010 0.114 18.2
2011 0.123 21.9
2012 0.133 25.0
2013 0.141 27.8
2014 0.149 30.2
2015 0.157 32.4
2016 0.163 34.5
2017 0.169 36.3
2018 0.174 38.1
2019 0.179 39.7
2020 0.182 41.3
2021 0.184 42.9
2022 0.186 44.4
2023 0.186 45.9
2024 0.186 47.4
2025 0.184 48.9
2026 0.181 50.4
2027 0.176 52.1
2028 0.171 53.8
2029 0.164 55.6
2030 0.155 57.7

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

grafico orbita





wds18035%2B4032d.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
18035+4032 COU1785 2005 18 349 0.1 8.70 8.90 F5 NO 180331.83+403200.6
18035+4032 COU1785 2007 19 2 0.1 8.70 8.90 F5 NOD 180331.83+403200.6

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