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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:43:26

Orbital Elements for COU1291

WDS:	COU1291	WDS ID/Discoverer
P:	82.000	Orbital period (years)
a:	0.221	Semi-major axis (arcseconds)
i:	61.3	Inclination (degrees)
Ω:	140.7	Longitude of ascending node (degrees)
T:	1969.440	Epoch of periastron passage (year)
e:	0.434	Eccentricity
ω:	326.7	Longitude of periastron (degrees)
Start-Year:	1984.0	Year
End-Year:	2066.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1291

Position:	170730.00+381020.6	Epoch-2000 right ascension and declination
WDS-ID:	17075+3810	WDS designation
Discoverer Code:	COU1291	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	155039	HD catalog number
Hipparcos number:	83791	Hipparcos catalog number
V1:	9.30	Magnitude of the primary
V2:	9.62	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU1291

WDS 6th Orbit including measures of COU1291

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

Ephemeris of COU1291

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.287    319.1
-------------------------
1984.0     0.109    213.1
1985.0     0.110    220.8
1986.0     0.112    228.4
1987.0     0.116    235.5
1988.0     0.120    242.2
1989.0     0.126    248.4
1990.0     0.132    253.9
1991.0     0.140    258.9
1992.0     0.147    263.5
1993.0     0.155    267.5
1994.0     0.163    271.2
1995.0     0.172    274.5
1996.0     0.180    277.5
1997.0     0.188    280.3
1998.0     0.197    282.8
1999.0     0.205    285.1
2000.0     0.213    287.2
2001.0     0.220    289.2
2002.0     0.228    291.0
2003.0     0.235    292.8
2004.0     0.242    294.4
2005.0     0.248    295.9
2006.0     0.255    297.4
2007.0     0.261    298.8
2008.0     0.266    300.1
2009.0     0.271    301.4
2010.0     0.276    302.7
2011.0     0.280    303.9
2012.0     0.284    305.0
2013.0     0.287    306.2
2014.0     0.290    307.3
2015.0     0.293    308.4
2016.0     0.295    309.4
2017.0     0.296    310.5
2018.0     0.297    311.6
2019.0     0.297    312.6
2020.0     0.297    313.7
2021.0     0.296    314.7
2022.0     0.295    315.8
2023.0     0.293    316.9
2024.0     0.290    317.9
2025.0     0.287    319.1
2026.0     0.283    320.2
2027.0     0.279    321.4
2028.0     0.274    322.6
2029.0     0.268    323.9
2030.0     0.261    325.2
2031.0     0.254    326.6
2032.0     0.245    328.1
2033.0     0.236    329.7
2034.0     0.227    331.4
2035.0     0.216    333.3
2036.0     0.205    335.4
2037.0     0.192    337.8
2038.0     0.179    340.4
2039.0     0.165    343.6
2040.0     0.151    347.3
2041.0     0.136    351.8
2042.0     0.120    357.5
2043.0     0.105      4.8
2044.0     0.091     14.5
2045.0     0.079     27.4
2046.0     0.071     44.1
2047.0     0.069     63.3
2048.0     0.073     82.1
2049.0     0.082     97.8
2050.0     0.093    110.1
2051.0     0.105    119.6
2052.0     0.115    127.3
2053.0     0.124    133.7
2054.0     0.131    139.4
2055.0     0.134    144.7
2056.0     0.136    149.8
2057.0     0.135    154.8
2058.0     0.133    160.0
2059.0     0.130    165.3
2060.0     0.126    171.0
2061.0     0.122    177.0
2062.0     0.118    183.5
2063.0     0.114    190.4
2064.0     0.111    197.7
2065.0     0.110    205.3

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.