17418+2130 COU 114 (HD 160935)

 
 
17h 41m 47.72s +21° 30' 06.4" P.A. 261.00 sep 0.1 mag 7.25,8.10 Sp F8IV dist. 89.85 pc (293.09 l.y.)
 
 
Coord 2000 17418+2130 Discov num COU 114 Comp Coord arcsec 2000 17 41 47.72 +21 30 06.4
Date first 1966 Date last 2012 Obs 63
Pa first 20 Pa last 261.1 P.A. Now (θ) 261.1°
Sep first 0.3 Sep last 0.096 Sep. Now (ρ) 0.096"
Mag pri 7.25 Mag sec 8.10 delta mag (ΔM) 0.85 Spectral class F8IV (yellow-white)
Pri motion ra +024 Sec motion ra
Pri motion dec -126 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 160935 Constellation Hercules SAO 85324 HIP 86596
Tycho2 1563-03552-1 Gaia DR2 4556052589795560960 HD 160935 GC 24005
BD BD+21 3188 Distance 89.85 Distance ly 293.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)105y Periastron (T)1943.83y Semi-major axis (a)0.305a
Eccentricity (e)0.55 Inclination (i)77.2° Longitude of periastron (ω)66°
Node (Ω)16° Notes ReferenceCou1999b
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 227.9 0.186
2001 229.6 0.178
2002 231.6 0.170
2003 233.7 0.163
2004 236.1 0.155
2005 238.6 0.147
2006 241.5 0.140
2007 244.7 0.133
2008 248.2 0.126
2009 252.1 0.119
2010 256.5 0.113
2011 261.3 0.108
2012 266.6 0.103
2013 272.4 0.100
2014 278.5 0.097
2015 284.9 0.095
2016 291.5 0.094
2017 298.2 0.095
2018 304.7 0.096
2019 310.9 0.099
2020 316.7 0.102
2021 322.1 0.107
2022 327.1 0.112
2023 331.6 0.117
2024 335.6 0.124
2025 339.3 0.130
2026 342.7 0.137
2027 345.7 0.143
2028 348.4 0.150
2029 350.9 0.157
2030 353.2 0.163


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



 
 


wds17418%2B2130a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic