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 |
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Comp |
AB |
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Coord arcsec 2000 |
16 56 34.99 +57 11 17.2 |
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Date first |
1905 |
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Date last |
2016 |
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Obs |
47 |
|
Pa first |
252 |
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Pa last |
219 |
|
P.A. Now (θ) |
199° |
|
Sep first |
0.4 |
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Sep last |
0.289 |
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Sep. Now (ρ) |
0.227" |
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Mag pri |
9.44 |
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Mag sec |
9.72 |
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delta mag (ΔM) |
0.28 |
|
Spectral class |
G0 (yellow) |
|
Pri motion ra |
+027 |
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Sec motion ra |
+027 |
|
Pri motion dec |
-014 |
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Sec motion dec |
-014 |
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Notes |
N
O
(See Notes, Orbital solution) |
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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 |
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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 |
|
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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° | |
Notes | n | |
Reference | Hrt2000c | |
Equinox | 2000 | |
Last observation | 1997 | |
Grade | 3 | (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 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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