18043+4206 COU1786Aa,Ab

 
 
18h 04m 16.91s +42 05' 45.0" P.A. 0.9 sep 0.18 mag 8.33,9.11 Sp F0 dist. 141.04 pc (460.07 l.y.)
 
 
Coord 2000
18043+4206
Discov num
COU1786
Comp
Aa,Ab
Coord arcsec 2000
18 04 16.91 +42 05 45.0
Date first
1979
Date last
2009
Obs
33
Pa first
75
Pa last
338
P.A. Now (θ)
0.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.18"
Mag pri
8.33
Mag sec
9.11
delta mag (ΔM)
0.78
Spectral class
F0 (yellow-white)
Pri motion ra
+009
Sec motion ra
Pri motion dec
+029
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18043+4206 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 47188 18043+4206 COU1786 Aa,Ab 1979 2009 33 1 0.2 8.33 9.11 0.78 Y <===
Show 47188 18043+4206 ROE 1 AB 1893 2003 8 186 24.0 8.33 12.40 4.07
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
337.5
Precise sep
0.134
Constellation
Hercules
SAO
47188
HIP
88498
Tycho2
3110-01491-1
HD
165503
BD
BD+42 2995
Distance
141.04
Distance ly
460.07
last precise pa
337.5
last precise sep
0.134
 
 
ORBITAL ELEMENTS
 
 
Period (P)56.97y± 9.62 Periastron (T)2045.61y± 10.85 Semi-major axis (a)0.148a± 0.015
Eccentricity (e)0.304± 0.068 Inclination (i)42.3°± 2.9 Longitude of periastron (ω)332.8°± 6.8
Node (Ω)202.1°± 9 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2007
label rho theta
2000 0.110 278.3
2001 0.113 286.2
2002 0.116 293.6
2003 0.120 300.6
2004 0.124 307.2
2005 0.129 313.2
2006 0.134 318.8
2007 0.140 324.0
2008 0.145 328.8
2009 0.151 333.3
2010 0.156 337.5
2011 0.161 341.4
2012 0.166 345.0
2013 0.170 348.5
2014 0.174 351.8
2015 0.178 354.9
2016 0.181 358.0
2017 0.183 0.9
2018 0.185 3.8
2019 0.187 6.6
2020 0.188 9.4
2021 0.188 12.1
2022 0.188 14.9
2023 0.187 17.7
2024 0.185 20.5
2025 0.183 23.3
2026 0.180 26.3
2027 0.176 29.4
2028 0.172 32.6
2029 0.167 36.0
2030 0.161 39.6

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

grafico orbita





wds18043%2B4206c.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
18043+4206 COU1786 Aa,Ab 2009 33 338 0.1 8.33 9.11 F0 NO 180416.91+420545.0

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