18092+3129 COU 812
18h 09m 09.93s +31° 29' 10.5" P.A. 265.00 sep 0.7 mag 10.77,10.85 Sp G0
Coord 2000 |
18092+3129 |
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Discov num |
COU 812 |
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Comp |
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Coord arcsec 2000 |
18 09 09.93 +31 29 10.5 |
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Date first |
1972 |
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Date last |
2016 |
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Obs |
21 |
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Pa first |
235 |
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Pa last |
264.7 |
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P.A. Now (θ) |
264.7° |
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Sep first |
0.5 |
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Sep last |
0.652 |
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Sep. Now (ρ) |
0.652" |
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Mag pri |
10.77 |
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Mag sec |
10.85 |
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delta mag (ΔM) |
0.08 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+029 |
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Sec motion ra |
+029 |
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Pri motion dec |
+009 |
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Sec motion dec |
+009 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Hercules |
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Tycho2 |
2622-01551-1 |
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Gaia DR2 |
4591199372322332672 |
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ORBITAL ELEMENTS SOLUTION #1
Period (P) | 173.33y | |
Periastron (T) | 1950.72y | |
Semi-major axis (a) | 0.57a | |
Eccentricity (e) | 0.5 | |
Inclination (i) | 40° | |
Longitude of periastron (ω) | 77.8° | |
Node (Ω) | 53° | |
Notes | | |
Reference | Cou1999b | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
270.2 |
0.656 |
2001 |
271.3 |
0.659 |
2002 |
272.3 |
0.661 |
2003 |
273.3 |
0.663 |
2004 |
274.3 |
0.665 |
2005 |
275.3 |
0.667 |
2006 |
276.3 |
0.669 |
2007 |
277.3 |
0.670 |
2008 |
278.3 |
0.672 |
2009 |
279.3 |
0.673 |
2010 |
280.3 |
0.674 |
2011 |
281.3 |
0.675 |
2012 |
282.3 |
0.676 |
2013 |
283.3 |
0.676 |
2014 |
284.2 |
0.677 |
2015 |
285.2 |
0.678 |
2016 |
286.2 |
0.678 |
2017 |
287.2 |
0.678 |
2018 |
288.1 |
0.678 |
2019 |
289.1 |
0.678 |
2020 |
290.1 |
0.678 |
2021 |
291.1 |
0.678 |
2022 |
292.0 |
0.678 |
2023 |
293.0 |
0.678 |
2024 |
294.0 |
0.677 |
2025 |
295.0 |
0.677 |
2026 |
295.9 |
0.676 |
2027 |
296.9 |
0.676 |
2028 |
297.9 |
0.675 |
2029 |
298.9 |
0.674 |
2030 |
299.9 |
0.673 |
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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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ORBITAL ELEMENTS SOLUTION #2
Period (P) | 440.4y | |
Periastron (T) | 2043.08y | |
Semi-major axis (a) | 1.555a | |
Eccentricity (e) | 0.785 | |
Inclination (i) | 79.3° | |
Longitude of periastron (ω) | 250.5° | |
Node (Ω) | 96.6° | |
Notes | | |
Reference | Lin2020 | |
Equinox | 2000 | |
Last observation | 2016 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
255.6 |
0.622 |
2001 |
256.2 |
0.625 |
2002 |
256.8 |
0.629 |
2003 |
257.4 |
0.632 |
2004 |
257.9 |
0.635 |
2005 |
258.5 |
0.638 |
2006 |
259.1 |
0.641 |
2007 |
259.6 |
0.643 |
2008 |
260.2 |
0.646 |
2009 |
260.7 |
0.648 |
2010 |
261.2 |
0.649 |
2011 |
261.8 |
0.651 |
2012 |
262.3 |
0.652 |
2013 |
262.8 |
0.653 |
2014 |
263.4 |
0.653 |
2015 |
263.9 |
0.653 |
2016 |
264.4 |
0.653 |
2017 |
265.0 |
0.652 |
2018 |
265.5 |
0.650 |
2019 |
266.1 |
0.648 |
2020 |
266.6 |
0.646 |
2021 |
267.1 |
0.642 |
2022 |
267.7 |
0.638 |
2023 |
268.3 |
0.634 |
2024 |
268.8 |
0.628 |
2025 |
269.4 |
0.621 |
2026 |
270.0 |
0.613 |
2027 |
270.6 |
0.604 |
2028 |
271.3 |
0.594 |
2029 |
271.9 |
0.582 |
2030 |
272.6 |
0.569 |
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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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