16566+5711 A 1143 AB

 
 
16h 56m 34.99s +57° 11' 17.2" P.A. 219.00 sep 0.3 mag 9.44,9.72 Sp G0 dist. 88.81 pc (289.7 l.y.)
 
 
Coord 2000 16566+5711 Discov num A  1143 Comp AB Coord arcsec 2000 16 56 34.99 +57 11 17.2
Date first 1905 Date last 2016 Obs 47
Pa first 252 Pa last 219 P.A. Now (θ) 199°
Sep first 0.4 Sep last 0.289 Sep. Now (ρ) 0.227"
Mag pri 9.44 Mag sec 9.72 delta mag (ΔM) 0.28 Spectral class G0 (yellow)
Pri motion ra +027 Sec motion ra +027
Pri motion dec -014 Sec motion dec -014
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
16566+5711 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 30169 16 56 35 +57 11 17 A 1143 AB 2016 47 219 0.3 9.44 9.72 0.28 Y <===
Show HD 153495 30169 16 56 35 +57 11 17 A 1143 AB,CD 2015 18 2 100.5 8.90 10.21 1.31
Show 30169 16 56 35 +57 11 17 A 1143 AB,E 2015 9 351 52.9 8.90 13.50 4.60
Show 30170 16 56 35 +57 12 57 A 1143 CD 2016 26 139 0.7 10.72 10.85 0.13
Quintuple system
7 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco SAO 30169 HIP 82910 Tycho2 3894-00576-1
HD 153495 ADS 10276 BD BD+57 1716 Distance 88.81
Distance ly 289.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)88.2y Periastron (T)1949.8y Semi-major axis (a)0.29a
Eccentricity (e)0.632 Inclination (i)136.4° Longitude of periastron (ω)39.2°
Node (Ω)101.7° Notesn ReferenceHrt2000c
Equinox2000 Last observation1997 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 244.3 0.404
2001 243.1 0.399
2002 241.9 0.394
2003 240.7 0.389
2004 239.4 0.383
2005 238.0 0.377
2006 236.7 0.371
2007 235.2 0.364
2008 233.8 0.358
2009 232.2 0.350
2010 230.6 0.343
2011 229.0 0.335
2012 227.2 0.327
2013 225.4 0.319
2014 223.4 0.311
2015 221.4 0.302
2016 219.2 0.293
2017 216.9 0.284
2018 214.4 0.275
2019 211.8 0.266
2020 209.0 0.256
2021 205.9 0.247
2022 202.6 0.237
2023 199.0 0.227
2024 195.2 0.218
2025 190.9 0.208
2026 186.3 0.199
2027 181.2 0.190
2028 175.6 0.181
2029 169.4 0.173
2030 162.6 0.165


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



 
 


wds16566%2B5711a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic