Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:53:54

Orbital Elements for COU1785

WDS:	COU1785	WDS ID/Discoverer
P:	45.720	Orbital period (years)
a:	0.135	Semi-major axis (arcseconds)
i:	65.7	Inclination (degrees)
Ω:	52.8	Longitude of ascending node (degrees)
T:	1995.000	Epoch of periastron passage (year)
e:	0.483	Eccentricity
ω:	147.0	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1785

Position:	180331.83+403200.6	Epoch-2000 right ascension and declination
WDS-ID:	18035+4032	WDS designation
Discoverer Code:	COU1785	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	165311	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.7	Magnitude of the primary
V2:	8.9	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2005	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU1785

WDS 6th Orbit including measures of COU1785

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of COU1785

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.184     48.9
-------------------------
2003.0     0.056    314.3
2004.0     0.060    329.7
2005.0     0.066    342.9
2006.0     0.074    353.5
2007.0     0.084      1.9
2008.0     0.094      8.5
2009.0     0.104     13.8
2010.0     0.114     18.2
2011.0     0.123     21.9
2012.0     0.133     25.0
2013.0     0.141     27.8
2014.0     0.149     30.2
2015.0     0.157     32.4
2016.0     0.163     34.5
2017.0     0.169     36.3
2018.0     0.174     38.1
2019.0     0.179     39.7
2020.0     0.182     41.3
2021.0     0.184     42.9
2022.0     0.186     44.4
2023.0     0.186     45.9
2024.0     0.186     47.4
2025.0     0.184     48.9
2026.0     0.181     50.4
2027.0     0.176     52.1
2028.0     0.171     53.8
2029.0     0.164     55.6
2030.0     0.155     57.7
2031.0     0.145     60.0
2032.0     0.133     62.6
2033.0     0.119     65.9
2034.0     0.103     70.1
2035.0     0.086     75.9
2036.0     0.067     84.8
2037.0     0.049    100.5
2038.0     0.035    131.9
2039.0     0.036    176.2
2040.0     0.050    205.6
2041.0     0.064    221.6
2042.0     0.073    232.4
2043.0     0.076    241.5
2044.0     0.074    250.6
2045.0     0.069    260.6
2046.0     0.063    272.5

Disclaimer

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.