18043+4206 COU 1786 Aa,Ab
18h 04m 16.91s +42° 05' 45.0" P.A. 11.00 sep 0.2 mag 8.33,9.11 Sp F0 dist. 141.04 pc (460.07 l.y.)
| Coord 2000 |
18043+4206 |
|
Discov num |
COU1786 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
18 04 16.91 +42 05 45.0 |
|
| Date first |
1979 |
|
Date last |
2016 |
|
Obs |
35 |
|
| Pa first |
75 |
|
Pa last |
11.4 |
|
P.A. Now (θ) |
17.7° |
|
| Sep first |
0.1 |
|
Sep last |
0.152 |
|
Sep. Now (ρ) |
0.187" |
|
| Mag pri |
8.33 |
|
Mag sec |
9.11 |
|
delta mag (ΔM) |
0.78 |
|
Spectral class |
F0 (yellow-white) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
|
|
| Pri motion dec |
+029 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
18043+4206 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
47188 |
18 04 17 +42 05 45 |
COU 1786 Aa,Ab |
2016 |
35 |
11 |
0.2 |
8.33 |
9.11 |
0.78 |
Y |
<=== |
| Show |
HD 165503 |
47188 |
18 04 17 +42 05 45 |
ROE 1 AB |
2015 |
14 |
186 |
24.3 |
8.33 |
12.40 |
4.07 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
SAO |
47188 |
|
HIP |
88498 |
|
Tycho2 |
3110-01491-1 |
|
| Gaia DR2 |
2113742900320323968 |
|
HD |
165503 |
|
BD |
BD+42 2995 |
|
Distance |
141.04 |
|
| Distance ly |
460.07 |
|
ORBITAL ELEMENTS
| Period (P) | 56.97y | ± 9.62 |
Periastron (T) | 2045.61y | ± 10.85 |
Semi-major axis (a) | 0.148a | ± 0.015 |
| Eccentricity (e) | 0.304 | ± 0.068 |
Inclination (i) | 42.3° | ± 2.9 |
Longitude of periastron (ω) | 332.8° | ± 6.8 |
| Node (Ω) | 202.1° | ± 9 |
Notes | n | |
Reference | Hrt2009 | |
| Equinox | | |
Last observation | 2007 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
278.3 |
0.110 |
| 2001 |
286.2 |
0.113 |
| 2002 |
293.6 |
0.116 |
| 2003 |
300.6 |
0.120 |
| 2004 |
307.2 |
0.124 |
| 2005 |
313.2 |
0.129 |
| 2006 |
318.8 |
0.134 |
| 2007 |
324.0 |
0.140 |
| 2008 |
328.8 |
0.145 |
| 2009 |
333.3 |
0.151 |
| 2010 |
337.5 |
0.156 |
| 2011 |
341.4 |
0.161 |
| 2012 |
345.0 |
0.166 |
| 2013 |
348.5 |
0.170 |
| 2014 |
351.8 |
0.174 |
| 2015 |
354.9 |
0.178 |
| 2016 |
358.0 |
0.181 |
| 2017 |
0.9 |
0.183 |
| 2018 |
3.8 |
0.185 |
| 2019 |
6.6 |
0.187 |
| 2020 |
9.4 |
0.188 |
| 2021 |
12.1 |
0.188 |
| 2022 |
14.9 |
0.188 |
| 2023 |
17.7 |
0.187 |
| 2024 |
20.5 |
0.185 |
| 2025 |
23.3 |
0.183 |
| 2026 |
26.3 |
0.180 |
| 2027 |
29.4 |
0.176 |
| 2028 |
32.6 |
0.172 |
| 2029 |
36.0 |
0.167 |
| 2030 |
39.6 |
0.161 |
|
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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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