18363+2143 COU 206 (HD 342628)
18h 36m 16.58s +21° 43' 07.9" P.A. 149.00 sep 0.1 mag 9.60,9.90 Sp F8+F9
| Coord 2000 |
18363+2143 |
|
Discov num |
COU 206 |
|
Comp |
|
|
Coord arcsec 2000 |
18 36 16.58 +21 43 07.9 |
|
| Date first |
1967 |
|
Date last |
2013 |
|
Obs |
20 |
|
| Pa first |
145 |
|
Pa last |
149.1 |
|
P.A. Now (θ) |
149.1° |
|
| Sep first |
0.2 |
|
Sep last |
0.096 |
|
Sep. Now (ρ) |
0.096" |
|
| Mag pri |
9.60 |
|
Mag sec |
9.90 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
F8+F9 (yellow-white/yellow-white) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
|
|
| Pri motion dec |
+019 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 342628 |
|
Constellation |
Hercules |
|
SAO |
86235 |
|
Tycho2 |
1582-00150-1 |
|
| Gaia DR2 |
4532050079158931712 |
|
HD |
342628 |
|
ORBITAL ELEMENTS
| Period (P) | 202y | ± 40 |
Periastron (T) | 2002y | ± 0.2 |
Semi-major axis (a) | 0.168a | ± 0.015 |
| Eccentricity (e) | 0.773 | ± 0.04 |
Inclination (i) | 119.2° | ± 3 |
Longitude of periastron (ω) | 143.4° | |
| Node (Ω) | 137.3° | ± 0.5 |
Notes | n | |
Reference | Doc2010h | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
22.5 |
0.022 |
| 2001 |
355.4 |
0.026 |
| 2002 |
337.2 |
0.033 |
| 2003 |
324.8 |
0.038 |
| 2004 |
315.3 |
0.043 |
| 2005 |
307.3 |
0.045 |
| 2006 |
299.9 |
0.047 |
| 2007 |
293.0 |
0.048 |
| 2008 |
286.2 |
0.048 |
| 2009 |
279.5 |
0.048 |
| 2010 |
272.9 |
0.049 |
| 2011 |
266.5 |
0.049 |
| 2012 |
260.2 |
0.050 |
| 2013 |
254.1 |
0.051 |
| 2014 |
248.3 |
0.053 |
| 2015 |
242.8 |
0.054 |
| 2016 |
237.7 |
0.056 |
| 2017 |
232.9 |
0.058 |
| 2018 |
228.5 |
0.060 |
| 2019 |
224.4 |
0.063 |
| 2020 |
220.6 |
0.066 |
| 2021 |
217.2 |
0.069 |
| 2022 |
214.0 |
0.071 |
| 2023 |
211.1 |
0.075 |
| 2024 |
208.4 |
0.078 |
| 2025 |
205.9 |
0.081 |
| 2026 |
203.6 |
0.084 |
| 2027 |
201.5 |
0.087 |
| 2028 |
199.5 |
0.090 |
| 2029 |
197.7 |
0.094 |
| 2030 |
196.0 |
0.097 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
