20203+3924 A  1427AB

 
 
20h 20m 15.22s +39 24' 11.8" P.A. 141.6 sep 0.18 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
2008
Obs
47
Pa first
112
Pa last
130
P.A. Now (θ)
141.6°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.18"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 69856 20203+3924 A 1427 AB 1906 2008 47 142 0.2 6.57 8.17 1.60 Y <===
Show 20203+3924 STF2668 AB,C 1831 2016 63 280 3.5 6.34 8.49 2.15
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
130
Precise sep
0.253
Constellation
Cygnus
SAO
69856
HIP
100268
Tycho2
3156-02225-1
Gaia DR2
69341204736
HD
193702
HR
7784
ADS
13728
BD
BD+38 4021
Distance
180.51
Distance ly
588.82
last precise pa
130
last precise sep
0.253
 
 
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° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.306 118.5
2001 0.302 119.3
2002 0.297 120.1
2003 0.292 120.9
2004 0.287 121.8
2005 0.282 122.7
2006 0.277 123.6
2007 0.271 124.6
2008 0.265 125.6
2009 0.259 126.7
2010 0.253 127.8
2011 0.246 128.9
2012 0.239 130.2
2013 0.232 131.5
2014 0.225 132.9
2015 0.217 134.3
2016 0.209 135.9
2017 0.201 137.7
2018 0.192 139.5
2019 0.184 141.6
2020 0.175 143.9
2021 0.166 146.4
2022 0.156 149.2
2023 0.146 152.3
2024 0.136 155.9
2025 0.126 160.1
2026 0.116 165.1
2027 0.105 171.0
2028 0.095 178.3
2029 0.084 187.3
2030 0.073 199.0

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






wds20203%2B3924b.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
20203+3924 A 1427 AB 2007 42 131 0.3 6.57 8.17 A2V+A5V NOD 202015.22+392411.8
20203+3924 A 1427 AB 2008 46 130 0.3 6.57 8.17 A2V+A5V NOD 202015.22+392411.8

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