19471-0809 A 108 (HD 186847)

 
 
19h 47m 08.04s -08 09' 09.9" P.A. 107.00 sep 0.3 mag 8.74,9.24 Sp K0 dist. 171.82 pc (560.48 l.y.)
 
 
Coord 2000 19471-0809 Discov num A   108 Comp Coord arcsec 2000 19 47 08.04 -08 09 09.9
Date first 1900 Date last 2018 Obs 43
Pa first 183 Pa last 107.3 P.A. Now (θ) 111.1°
Sep first 0.3 Sep last 0.315 Sep. Now (ρ) 0.319"
Mag pri 8.74 Mag sec 9.24 delta mag (ΔM) 0.5 Spectral class K0 (yellow-orange)
Pri motion ra +003 Sec motion ra
Pri motion dec -024 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 186847 Constellation Aquila SAO 143795 HIP 97350
Tycho2 5724-01075-1 Gaia DR2 4196236344448739456 HD 186847 ADS 12911
BD BD-08 5103 Distance 171.82 Distance ly 560.48
 
 
ORBITAL ELEMENTS
 
 
Period (P)242.85y Periastron (T)1946.34y Semi-major axis (a)0.299a
Eccentricity (e)0.717 Inclination (i)51.4° Longitude of periastron (ω)265°
Node (Ω)53.8° Notes ReferenceDoc2017l
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 97.3 0.298
2001 98.0 0.300
2002 98.6 0.301
2003 99.3 0.302
2004 99.9 0.303
2005 100.5 0.305
2006 101.1 0.306
2007 101.7 0.307
2008 102.4 0.308
2009 103.0 0.309
2010 103.6 0.310
2011 104.2 0.310
2012 104.8 0.311
2013 105.4 0.312
2014 105.9 0.313
2015 106.5 0.314
2016 107.1 0.314
2017 107.7 0.315
2018 108.3 0.316
2019 108.9 0.316
2020 109.4 0.317
2021 110.0 0.318
2022 110.6 0.318
2023 111.1 0.319
2024 111.7 0.319
2025 112.3 0.320
2026 112.8 0.320
2027 113.4 0.321
2028 114.0 0.321
2029 114.5 0.321
2030 115.1 0.322


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



 
 


wds19471-0809e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic