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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:50:50

Orbital Elements for COU1681

WDS:	COU1681	WDS ID/Discoverer
P:	68.300	Orbital period (years)
a:	0.23	Semi-major axis (arcseconds)
i:	135.3	Inclination (degrees)
Ω:	6.8	Longitude of ascending node (degrees)
T:	2011.900	Epoch of periastron passage (year)
e:	0.395	Eccentricity
ω:	109.5	Longitude of periastron (degrees)
Start-Year:	1991.0	Year
End-Year:	2059.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1681

Position:	032205.17+443942.0	Epoch-2000 right ascension and declination
WDS-ID:	03221+4440	WDS designation
Discoverer Code:	COU1681	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	15688	Hipparcos catalog number
V1:	10.04	Magnitude of the primary
V2:	10.78	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU1681

WDS 6th Orbit including measures of COU1681

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

Ephemeris of COU1681

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.203    152.1
-------------------------
1991.0     0.262     33.2
1992.0     0.261     30.5
1993.0     0.259     27.8
1994.0     0.256     25.0
1995.0     0.253     22.2
1996.0     0.249     19.3
1997.0     0.244     16.3
1998.0     0.238     13.2
1999.0     0.231      9.9
2000.0     0.223      6.3
2001.0     0.213      2.5
2002.0     0.203    358.3
2003.0     0.191    353.6
2004.0     0.178    348.3
2005.0     0.164    342.0
2006.0     0.150    334.6
2007.0     0.135    325.6
2008.0     0.121    314.4
2009.0     0.109    300.6
2010.0     0.102    284.1
2011.0     0.100    266.1
2012.0     0.105    248.7
2013.0     0.114    233.3
2014.0     0.126    220.6
2015.0     0.138    210.2
2016.0     0.150    201.4
2017.0     0.161    193.9
2018.0     0.171    187.3
2019.0     0.179    181.4
2020.0     0.185    175.9
2021.0     0.191    170.7
2022.0     0.195    165.8
2023.0     0.198    161.1
2024.0     0.201    156.5
2025.0     0.203    152.1
2026.0     0.204    147.7
2027.0     0.205    143.3
2028.0     0.206    139.0
2029.0     0.207    134.8
2030.0     0.208    130.6
2031.0     0.209    126.4
2032.0     0.210    122.2
2033.0     0.211    118.1
2034.0     0.212    114.0
2035.0     0.214    110.0
2036.0     0.215    106.1
2037.0     0.217    102.2
2038.0     0.219     98.3
2039.0     0.221     94.6
2040.0     0.224     90.9
2041.0     0.226     87.3
2042.0     0.229     83.8
2043.0     0.231     80.3
2044.0     0.234     77.0
2045.0     0.237     73.7
2046.0     0.240     70.5
2047.0     0.243     67.4
2048.0     0.246     64.3
2049.0     0.248     61.3
2050.0     0.251     58.4
2051.0     0.254     55.5
2052.0     0.256     52.7
2053.0     0.258     50.0
2054.0     0.259     47.3
2055.0     0.261     44.6
2056.0     0.262     41.9
2057.0     0.262     39.2
2058.0     0.262     36.6

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.