09354+3958 COU 2084 Aa,Ab

 
 
09h 35m 22.50s +39° 57' 47.7" P.A. 190.00 sep 0.1 mag 6.98,8.79 Sp F2V dist. 85.18 pc (277.86 l.y.)
 
 
Coord 2000 09354+3958 Discov num COU2084 Comp Aa,Ab Coord arcsec 2000 09 35 22.50 +39 57 47.7
Date first 1982 Date last 2019 Obs 17
Pa first 113 Pa last 190.2 P.A. Now (θ) 146.3°
Sep first 0.3 Sep last 0.092 Sep. Now (ρ) 0.131"
Mag pri 6.98 Mag sec 8.79 delta mag (ΔM) 1.81 Spectral class F2V (yellow-white)
Pri motion ra -004 Sec motion ra -004
Pri motion dec +015 Sec motion dec +015
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
09354+3958 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 42931 09 35 22 +39 57 48 COU 2084 Aa,Ab 2019 17 190 0.1 6.98 8.79 1.81 Y <===
Show DI Lyn 42931 09 35 22 +39 57 48 STF 1369 AB 2019 60 150 25.1 6.98 7.98 1.00
Show 42931 09 35 22 +39 57 48 STF 1369 AC 2017 43 323 116.3 6.98 8.42 1.44
Show 42930 09 35 24 +39 57 26 STF 1369 BC 2017 35 324 141.6 7.98 8.42 0.44
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name DI Lyn Constellation Lynx SAO 42931 HIP 47053
Tycho2 2992-01686-1 Gaia DR2 813111839701758080 HD 82780 HR 3811
ADS 7438 BD BD+40 2226 Distance 85.18 Distance ly 277.86
 
 
ORBITAL ELEMENTS
 
 
Period (P)50.34y± 1.91 Periastron (T)2012.39y± 0.82 Semi-major axis (a)0.246a± 0.012
Eccentricity (e)0.652± 0.036 Inclination (i)112.9°± 3.4 Longitude of periastron (ω)137°± 6.9
Node (Ω)84.7°± 1.7 Notesn ReferenceTok2019e
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 90.1 0.320
2001 88.8 0.310
2002 87.5 0.298
2003 85.9 0.283
2004 84.3 0.266
2005 82.3 0.245
2006 80.0 0.222
2007 77.0 0.194
2008 72.9 0.161
2009 66.6 0.123
2010 53.8 0.081
2011 14.1 0.042
2012 299.0 0.052
2013 271.3 0.086
2014 257.4 0.103
2015 245.8 0.105
2016 233.9 0.101
2017 220.8 0.096
2018 206.3 0.093
2019 191.4 0.093
2020 177.2 0.098
2021 164.9 0.106
2022 154.6 0.118
2023 146.3 0.131
2024 139.6 0.146
2025 134.2 0.161
2026 129.7 0.176
2027 125.9 0.191
2028 122.6 0.206
2029 119.8 0.220
2030 117.3 0.234


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



 
 


wds09354%2B3958a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic