20157+4339 A 2095 AB

 
 
20h 15m 40.26s +43 38' 59.6" P.A. 333.00 sep 0.2 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 2012 Obs 24
Pa first 326 Pa last 332.7 P.A. Now (θ) 332.7°
Sep first 0.2 Sep last 0.241 Sep. Now (ρ) 0.241"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 49388 20 15 40 +43 38 60 A 2095 AB 2012 24 333 0.2 9.06 9.82 0.76 Y <===
Show HD 192911 49388 20 15 40 +43 38 60 STF 2659 AB,C 2019 36 311 2.7 8.61 10.82 2.21
Show 49388 20 15 40 +43 38 60 STF 2659 AB,D 2019 27 251 20.5 8.61 9.83 1.22
Show 20 15 39 +43 38 54 FOX 39 DE 2016 6 135 1.4 9.83 13.10 3.27
Show 20 15 39 +43 38 54 A 2095 DF 2015 13 48 7.6 9.83 13.80 3.97
Sextuple system
7 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 49388 HIP 99862 Tycho2 3163-01043-1
Gaia DR2 2080915335711861760 HD 192911 GC 28164 ADS 13611
BD BD+43 3543 Distance 255.75 Distance ly 834.26
 
 
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° Notesn ReferenceLin2012c
Equinox2000 Last observation2009 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 157.2 0.238
2001 156.9 0.242
2002 156.7 0.245
2003 156.4 0.248
2004 156.2 0.251
2005 155.9 0.255
2006 155.7 0.258
2007 155.5 0.260
2008 155.3 0.263
2009 155.1 0.266
2010 154.9 0.268
2011 154.7 0.271
2012 154.5 0.273
2013 154.3 0.275
2014 154.1 0.277
2015 153.9 0.278
2016 153.7 0.280
2017 153.5 0.281
2018 153.3 0.282
2019 153.1 0.283
2020 153.0 0.284
2021 152.8 0.285
2022 152.6 0.285
2023 152.4 0.285
2024 152.2 0.284
2025 152.0 0.284
2026 151.9 0.283
2027 151.7 0.282
2028 151.5 0.280
2029 151.3 0.278
2030 151.1 0.275


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



 
 


wds20157%2B4339b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic