20203+3924 A 1427 AB

 
 
20h 20m 15.22s +39 24' 11.8" P.A. 132.00 sep 0.2 mag 6.57,8.17 Sp A2V+A5V dist. 180.51 pc (588.82 l.y.)
 
 
Coord 2000 20203+3924 Discov num A  1427 Comp AB Coord arcsec 2000 20 20 15.22 +39 24 11.8
Date first 1906 Date last 2012 Obs 49
Pa first 112 Pa last 132.4 P.A. Now (θ) 152.3°
Sep first 0.3 Sep last 0.19 Sep. Now (ρ) 0.146"
Mag pri 6.57 Mag sec 8.17 delta mag (ΔM) 1.6 Spectral class A2V+A5V (white/white)
Pri motion ra -003 Sec motion ra
Pri motion dec -029 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20203+3924 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 69856 20 20 15 +39 24 12 A 1427 AB 2012 49 132 0.2 6.57 8.17 1.60 Y <===
Show HD 193702 69856 20 20 15 +39 24 12 STF 2668 AB,C 2016 64 280 3.5 6.34 8.49 2.15
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 69856 HIP 100268 Tycho2 3156-02225-1
Gaia DR2 2061463669341204736 HD 193702 HR 7784 GC 28299
ADS 13728 BD BD+38 4021 Distance 180.51 Distance ly 588.82
 
 
ORBITAL ELEMENTS
 
 
Period (P)82.61y Periastron (T)2032.75y Semi-major axis (a)0.25a
Eccentricity (e)0.879 Inclination (i)56.1° Longitude of periastron (ω)238.3°
Node (Ω)70.4° Notesn ReferenceDoc2016h
Equinox2000 Last observation2008 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 118.5 0.306
2001 119.3 0.302
2002 120.1 0.297
2003 120.9 0.292
2004 121.8 0.287
2005 122.7 0.282
2006 123.6 0.277
2007 124.6 0.271
2008 125.6 0.265
2009 126.7 0.259
2010 127.8 0.253
2011 128.9 0.246
2012 130.2 0.239
2013 131.5 0.232
2014 132.9 0.225
2015 134.3 0.217
2016 135.9 0.209
2017 137.7 0.201
2018 139.5 0.192
2019 141.6 0.184
2020 143.9 0.175
2021 146.4 0.166
2022 149.2 0.156
2023 152.3 0.146
2024 155.9 0.136
2025 160.1 0.126
2026 165.1 0.116
2027 171.0 0.105
2028 178.3 0.095
2029 187.3 0.084
2030 199.0 0.073


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



 
 


wds20203%2B3924b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic