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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:53:13

Orbital Elements for COU691

WDS:	COU691	WDS ID/Discoverer
P:	55.880	Orbital period (years)
a:	0.155	Semi-major axis (arcseconds)
i:	66.2	Inclination (degrees)
Ω:	66.5	Longitude of ascending node (degrees)
T:	1961.930	Epoch of periastron passage (year)
e:	0.141	Eccentricity
ω:	258.2	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU691

Position:	034215.91+314034.5	Epoch-2000 right ascension and declination
WDS-ID:	03423+3141	WDS designation
Discoverer Code:	COU691	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.0	Magnitude of the primary
V2:	9.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2007	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU691

WDS 6th Orbit including measures of COU691

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

Ephemeris of COU691

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.112     46.3
-------------------------
1998.0     0.102    210.6
1999.0     0.110    216.0
2000.0     0.119    220.8
2001.0     0.126    224.9
2002.0     0.133    228.6
2003.0     0.139    231.9
2004.0     0.144    235.0
2005.0     0.147    237.9
2006.0     0.149    240.7
2007.0     0.149    243.5
2008.0     0.148    246.3
2009.0     0.145    249.2
2010.0     0.140    252.3
2011.0     0.133    255.6
2012.0     0.124    259.3
2013.0     0.114    263.7
2014.0     0.103    269.0
2015.0     0.090    275.6
2016.0     0.078    284.4
2017.0     0.067    296.4
2018.0     0.058    312.6
2019.0     0.054    332.7
2020.0     0.056    353.5
2021.0     0.064     11.0
2022.0     0.075     24.1
2023.0     0.087     33.6
2024.0     0.100     40.8
2025.0     0.112     46.3
2026.0     0.123     50.8
2027.0     0.133     54.6
2028.0     0.141     57.9
2029.0     0.148     60.9
2030.0     0.153     63.6
2031.0     0.156     66.2
2032.0     0.158     68.7
2033.0     0.158     71.2
2034.0     0.157     73.7
2035.0     0.154     76.2
2036.0     0.150     78.9
2037.0     0.145     81.7
2038.0     0.139     84.8
2039.0     0.132     88.1
2040.0     0.124     91.9
2041.0     0.116     96.2
2042.0     0.107    101.2
2043.0     0.099    107.0
2044.0     0.091    113.9
2045.0     0.083    122.0
2046.0     0.077    131.7
2047.0     0.073    142.7
2048.0     0.071    154.6
2049.0     0.072    166.8
2050.0     0.075    178.3
2051.0     0.080    188.6

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.