18130+3318 COU 1006
18h 12m 58.00s +33° 17' 53.9" P.A. 337.00 sep 0.5 mag 9.23,11.29 Sp G0 dist. 69.44 pc (226.51 l.y.)
| Coord 2000 |
18130+3318 |
|
Discov num |
COU1006 |
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Comp |
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Coord arcsec 2000 |
18 12 58.00 +33 17 53.9 |
|
| Date first |
1973 |
|
Date last |
2016 |
|
Obs |
22 |
|
| Pa first |
193 |
|
Pa last |
337.4 |
|
P.A. Now (θ) |
337.4° |
|
| Sep first |
0.5 |
|
Sep last |
0.514 |
|
Sep. Now (ρ) |
0.514" |
|
| Mag pri |
9.23 |
|
Mag sec |
11.29 |
|
delta mag (ΔM) |
2.06 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+125 |
|
Sec motion ra |
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|
| Pri motion dec |
-015 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
HIP |
89268 |
|
Tycho2 |
2626-01393-1 |
|
Gaia DR2 |
4604968414698562304 |
|
| BD |
BD+33 3050 |
|
Distance |
69.44 |
|
Distance ly |
226.51 |
|
ORBITAL ELEMENTS
| Period (P) | 221y | ± 44.7 |
Periastron (T) | 1980.2y | ± 3 |
Semi-major axis (a) | 0.743a | ± 0.083 |
| Eccentricity (e) | 0.384 | ± 0.083 |
Inclination (i) | 52.2° | ± 1.6 |
Longitude of periastron (ω) | 201.1° | ± 8.5 |
| Node (Ω) | 16.6° | ± 2.7 |
Notes | | |
Reference | Ksr2021 | |
| Equinox | | |
Last observation | 2009 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
285.8 |
0.340 |
| 2001 |
290.2 |
0.346 |
| 2002 |
294.4 |
0.352 |
| 2003 |
298.4 |
0.360 |
| 2004 |
302.2 |
0.369 |
| 2005 |
305.8 |
0.379 |
| 2006 |
309.3 |
0.390 |
| 2007 |
312.5 |
0.402 |
| 2008 |
315.6 |
0.414 |
| 2009 |
318.5 |
0.427 |
| 2010 |
321.2 |
0.440 |
| 2011 |
323.7 |
0.453 |
| 2012 |
326.1 |
0.467 |
| 2013 |
328.4 |
0.481 |
| 2014 |
330.5 |
0.496 |
| 2015 |
332.6 |
0.510 |
| 2016 |
334.5 |
0.524 |
| 2017 |
336.3 |
0.539 |
| 2018 |
338.0 |
0.553 |
| 2019 |
339.6 |
0.568 |
| 2020 |
341.1 |
0.582 |
| 2021 |
342.6 |
0.596 |
| 2022 |
344.0 |
0.611 |
| 2023 |
345.3 |
0.625 |
| 2024 |
346.6 |
0.638 |
| 2025 |
347.8 |
0.652 |
| 2026 |
349.0 |
0.665 |
| 2027 |
350.1 |
0.679 |
| 2028 |
351.2 |
0.692 |
| 2029 |
352.2 |
0.704 |
| 2030 |
353.3 |
0.717 |
|
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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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