16566+5711 A  1143AB

 
 
16h 56m 34.99s +57 11' 17.2" P.A. 216.9 sep 0.28 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
2008
Obs
40
Pa first
252
Pa last
234
P.A. Now (θ)
216.9°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.28"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 30169 16566+5711 A 1143 AB 1905 2008 40 217 0.3 9.44 9.72 0.28 Y <===
Show 30169 16566+5711 A 1143 AB,CD 1905 2004 14 2 99.7 8.90 10.21 1.31
Show 30169 16566+5711 A 1143 AB,E 1905 2003 5 351 52.2 8.90 13.50 4.60
Show 30170 16566+5711 A 1143 CD 1905 2010 22 140 0.7 10.72 10.85 0.13
Quintuple system
7 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
234.1
Precise sep
0.358
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
last precise pa
234.1
last precise sep
0.358
 
 
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° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.404 244.3
2001 0.399 243.1
2002 0.394 241.9
2003 0.389 240.7
2004 0.383 239.4
2005 0.377 238.0
2006 0.371 236.7
2007 0.364 235.2
2008 0.358 233.8
2009 0.350 232.2
2010 0.343 230.6
2011 0.335 229.0
2012 0.327 227.2
2013 0.319 225.4
2014 0.311 223.4
2015 0.302 221.4
2016 0.293 219.2
2017 0.284 216.9
2018 0.275 214.4
2019 0.266 211.8
2020 0.256 209.0
2021 0.247 205.9
2022 0.237 202.6
2023 0.227 199.0
2024 0.218 195.2
2025 0.208 190.9
2026 0.199 186.3
2027 0.190 181.2
2028 0.181 175.6
2029 0.173 169.4
2030 0.165 162.6

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

grafico orbita





wds16566%2B5711a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16566+5711 A 1143 AB 1997 38 247 0.4 9.44 9.72 G0 NOD 165634.99+571117.2
16566+5711 A 1143 AB 2006 39 236 0.4 9.44 9.72 G0 NOD 165634.99+571117.2
16566+5711 A 1143 AB 2008 40 234 0.4 9.44 9.72 G0 NOD 165634.99+571117.2

If you need more information about this double, apply for a data request form to the WDS.