20080+4204 A 383 (HD 227855)

 
 
20h 08m 00.45s +42 03' 39.4" P.A. 8.00 sep 0.3 mag 10.37,10.43 Sp F2
 
 
Coord 2000 20080+4204 Discov num A   383 Comp Coord arcsec 2000 20 08 00.45 +42 03 39.4
Date first 1902 Date last 2012 Obs 16
Pa first 55 Pa last 7.8 P.A. Now (θ) 7.8°
Sep first 0.3 Sep last 0.345 Sep. Now (ρ) 0.345"
Mag pri 10.37 Mag sec 10.43 delta mag (ΔM) 0.06 Spectral class F2 (yellow-white)
Pri motion ra -006 Sec motion ra -006
Pri motion dec -004 Sec motion dec -004
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 227855 Constellation Cygnus SAO 49214 Tycho2 3158-01559-1
HD 227855 ADS 13418
 
 
ORBITAL ELEMENTS
 
 
Period (P)453y Periastron (T)2318.9y Semi-major axis (a)0.478a
Eccentricity (e)0.678 Inclination (i)115° Longitude of periastron (ω)94°
Node (Ω)251° Notes ReferenceHrt2013c
Equinox2000 Last observation2008 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 16.7 0.351
2001 16.2 0.350
2002 15.8 0.350
2003 15.3 0.350
2004 14.9 0.349
2005 14.4 0.349
2006 13.9 0.348
2007 13.5 0.348
2008 13.0 0.347
2009 12.5 0.347
2010 12.1 0.347
2011 11.6 0.346
2012 11.1 0.346
2013 10.6 0.345
2014 10.2 0.345
2015 9.7 0.345
2016 9.2 0.344
2017 8.7 0.344
2018 8.3 0.344
2019 7.8 0.343
2020 7.3 0.343
2021 6.8 0.343
2022 6.4 0.342
2023 5.9 0.342
2024 5.4 0.342
2025 4.9 0.341
2026 4.4 0.341
2027 3.9 0.341
2028 3.4 0.340
2029 3.0 0.340
2030 2.5 0.340


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



 
 


wds20080%2B4204a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic