20157+4339 A  2095AB

 
 
20h 15m 40.26s +43 38' 59.6" P.A. 153.1 sep 0.28 mag 9.06,9.82 Sp F5 dist. 255.75 pc (834.26 l.y.)
 
 
Coord 2000
20157+4339
Discov num
A  2095
Comp
AB
Coord arcsec 2000
20 15 40.26 +43 38 59.6
Date first
1909
Date last
2009
Obs
22
Pa first
326
Pa last
336
P.A. Now (θ)
153.1°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.28"
Mag pri
9.06
Mag sec
9.82
delta mag (ΔM)
0.76
Spectral class
F5 (yellow-white)
Pri motion ra
+013
Sec motion ra
Pri motion dec
-012
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
20157+4339 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20157+4339 A 2095 AB 1909 2009 22 153 0.3 9.06 9.82 0.76 Y <===
Show 20157+4339 STF2659 AB,C 1828 2017 33 314 3.1 8.61 10.82 2.21
Show 20157+4339 STF2659 AB,D 1828 2004 26 253 19.3 8.61 9.83 1.22
Show 20157+4339 FOX 39 DE 1915 1954 4 128 1.2 9.83 13.10 3.27
Show 20157+4339 A 2095 DF 1892 2015 13 48 7.6 9.83 13.80 3.97
Sextuple system
7 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
335.9
Precise sep
0.26
Constellation
Cygnus
SAO
49388
HIP
99862
Gaia DR2
35711861760
HD
192911
ADS
13611
BD
BD+43 3543
Distance
255.75
Distance ly
834.26
last precise pa
335.9
last precise sep
0.26
 
 
ORBITAL ELEMENTS
 
 
Period (P)148.58y Periastron (T)2049.9y Semi-major axis (a)0.345a
Eccentricity (e)0.758 Inclination (i)94.5° Longitude of periastron (ω)101.6°
Node (Ω)147.5° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.238 157.2
2001 0.242 156.9
2002 0.245 156.7
2003 0.248 156.4
2004 0.251 156.2
2005 0.255 155.9
2006 0.258 155.7
2007 0.260 155.5
2008 0.263 155.3
2009 0.266 155.1
2010 0.268 154.9
2011 0.271 154.7
2012 0.273 154.5
2013 0.275 154.3
2014 0.277 154.1
2015 0.278 153.9
2016 0.280 153.7
2017 0.281 153.5
2018 0.282 153.3
2019 0.283 153.1
2020 0.284 153.0
2021 0.285 152.8
2022 0.285 152.6
2023 0.285 152.4
2024 0.284 152.2
2025 0.284 152.0
2026 0.283 151.9
2027 0.282 151.7
2028 0.280 151.5
2029 0.278 151.3
2030 0.275 151.1

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






wds20157%2B4339b.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
20157+4339 A 2095 AB 1997 19 149 0.2 8.90 8.90 F5 NO 201540.26+433859.6
20157+4339 A 2095 AB 2009 20 156 0.3 8.90 8.90 F5 NO 201540.26+433859.6

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