17563+0259 A 2189 (HD 163471)

 
 
17h 56m 16.70s +02° 59' 09.1" P.A. 288.00 sep 0.1 mag 8.50,8.80 Sp A2 dist. 398.41 pc (1299.61 l.y.)
 
 
Coord 2000 17563+0259 Discov num A  2189 Comp Coord arcsec 2000 17 56 16.70 +02 59 09.1
Date first 1910 Date last 2018 Obs 29
Pa first 326 Pa last 288.3 P.A. Now (θ) 296.4°
Sep first 0.3 Sep last 0.134 Sep. Now (ρ) 0.158"
Mag pri 8.50 Mag sec 8.80 delta mag (ΔM) 0.3 Spectral class A2 (white)
Pri motion ra +006 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 163471 Constellation Ophiuchus SAO 122936 HIP 87811
Tycho2 0421-00446-1 Gaia DR2 4469168184529999488 HD 163471 ADS 10899
BD BD+03 3534 Distance 398.41 Distance ly 1299.61
 
 
ORBITAL ELEMENTS
 
 
Period (P)171.73y± 6.17 Periastron (T)1975.08y± 0.72 Semi-major axis (a)0.235a± 0.008
Eccentricity (e)0.517± 0.02 Inclination (i)71°± 1 Longitude of periastron (ω)328.3°± 2
Node (Ω)150.8°± 1 Notesn ReferenceDoc2018l
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 217.2 0.076
2001 222.8 0.076
2002 228.5 0.075
2003 234.1 0.076
2004 239.7 0.077
2005 245.1 0.078
2006 250.2 0.080
2007 255.0 0.083
2008 259.5 0.086
2009 263.7 0.090
2010 267.5 0.094
2011 271.0 0.098
2012 274.3 0.102
2013 277.2 0.107
2014 279.9 0.112
2015 282.4 0.117
2016 284.7 0.122
2017 286.7 0.127
2018 288.7 0.132
2019 290.4 0.137
2020 292.1 0.143
2021 293.6 0.148
2022 295.1 0.153
2023 296.4 0.158
2024 297.6 0.164
2025 298.8 0.169
2026 299.9 0.174
2027 300.9 0.179
2028 301.9 0.184
2029 302.8 0.189
2030 303.7 0.194


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



 
 


wds17563%2B0259d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic