20102+4357 STT 400 (HD 191854)

 
 
20h 10m 13.32s +43 56' 44.2" P.A. 329.00 sep 0.7 mag 7.60,9.83 Sp G3V dist. 51.33 pc (167.44 l.y.)
 
 
Coord 2000 20102+4357 Discov num STT 400 Comp Coord arcsec 2000 20 10 13.32 +43 56 44.2
Date first 1843 Date last 2017 Obs 242
Pa first 327 Pa last 328.7 P.A. Now (θ) 323.8°
Sep first 0.5 Sep last 0.695 Sep. Now (ρ) 0.641"
Mag pri 7.60 Mag sec 9.83 delta mag (ΔM) 2.23 Spectral class G3V (yellow)
Pri motion ra +009 Sec motion ra +009
Pri motion dec +089 Sec motion dec +089
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 191854 Constellation Cygnus SAO 49262 HIP 99376
Tycho2 3163-01459-1 Gaia DR2 2081078269591424896 HD 191854 GC 28005
ADS 13461 BD BD+43 3513 Distance 51.33 Distance ly 167.44
 
 
ORBITAL ELEMENTS
 
 
Period (P)85.61y Periastron (T)1970.27y Semi-major axis (a)0.449a
Eccentricity (e)0.488 Inclination (i)116.4° Longitude of periastron (ω)339.4°
Node (Ω)142.2° Notesn ReferenceHei1997
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 345.0 0.491
2001 343.6 0.506
2002 342.4 0.522
2003 341.2 0.536
2004 340.1 0.549
2005 339.0 0.562
2006 338.0 0.574
2007 337.0 0.585
2008 336.1 0.595
2009 335.2 0.605
2010 334.3 0.613
2011 333.4 0.621
2012 332.6 0.628
2013 331.7 0.634
2014 330.9 0.639
2015 330.1 0.643
2016 329.3 0.646
2017 328.6 0.648
2018 327.8 0.649
2019 327.0 0.650
2020 326.2 0.649
2021 325.4 0.647
2022 324.6 0.644
2023 323.8 0.641
2024 323.0 0.636
2025 322.2 0.630
2026 321.4 0.623
2027 320.5 0.615
2028 319.6 0.605
2029 318.7 0.595
2030 317.8 0.583


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



 
 


wds20102%2B4357b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic