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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:56:45

Orbital Elements for COU169AA,AB

WDS:	COU169AA,AB	WDS ID/Discoverer
P:	92.700	Orbital period (years)
a:	0.457	Semi-major axis (arcseconds)
i:	134.1	Inclination (degrees)
Ω:	50.2	Longitude of ascending node (degrees)
T:	1964.500	Epoch of periastron passage (year)
e:	0.676	Eccentricity
ω:	259.7	Longitude of periastron (degrees)
Start-Year:	1979.0	Year
End-Year:	2071.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU169AA,AB

Position:	101401.84+222722.7	Epoch-2000 right ascension and declination
WDS-ID:	10140+2227	WDS designation
Discoverer Code:	COU169AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	50130	Hipparcos catalog number
V1:	10.72	Magnitude of the primary
V2:	10.91	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU169AA,AB

WDS 6th Orbit including measures of COU169AA,AB

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

Ephemeris of COU169AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.499    313.3
-------------------------
1979.0     0.439     23.6
1980.0     0.450     21.5
1981.0     0.461     19.5
1982.0     0.471     17.6
1983.0     0.480     15.7
1984.0     0.488     14.0
1985.0     0.495     12.2
1986.0     0.502     10.6
1987.0     0.508      8.9
1988.0     0.514      7.3
1989.0     0.519      5.8
1990.0     0.523      4.2
1991.0     0.528      2.7
1992.0     0.531      1.3
1993.0     0.535    359.8
1994.0     0.538    358.3
1995.0     0.540    356.9
1996.0     0.542    355.5
1997.0     0.544    354.1
1998.0     0.546    352.7
1999.0     0.547    351.3
2000.0     0.548    349.9
2001.0     0.549    348.5
2002.0     0.549    347.1
2003.0     0.549    345.8
2004.0     0.549    344.4
2005.0     0.549    343.0
2006.0     0.548    341.6
2007.0     0.547    340.2
2008.0     0.546    338.8
2009.0     0.545    337.4
2010.0     0.543    336.0
2011.0     0.542    334.6
2012.0     0.540    333.2
2013.0     0.538    331.8
2014.0     0.536    330.3
2015.0     0.533    328.9
2016.0     0.531    327.4
2017.0     0.528    325.9
2018.0     0.525    324.4
2019.0     0.522    322.9
2020.0     0.518    321.4
2021.0     0.515    319.8
2022.0     0.511    318.2
2023.0     0.507    316.6
2024.0     0.503    315.0
2025.0     0.499    313.3
2026.0     0.495    311.6
2027.0     0.490    309.9
2028.0     0.485    308.2
2029.0     0.481    306.4
2030.0     0.475    304.6
2031.0     0.470    302.7
2032.0     0.465    300.8
2033.0     0.459    298.9
2034.0     0.453    296.9
2035.0     0.447    294.8
2036.0     0.440    292.7
2037.0     0.433    290.5
2038.0     0.426    288.3
2039.0     0.419    285.9
2040.0     0.411    283.5
2041.0     0.403    281.0
2042.0     0.394    278.4
2043.0     0.385    275.6
2044.0     0.375    272.7
2045.0     0.364    269.7
2046.0     0.353    266.5
2047.0     0.340    263.0
2048.0     0.326    259.3
2049.0     0.311    255.2
2050.0     0.295    250.6
2051.0     0.276    245.5
2052.0     0.254    239.6
2053.0     0.229    232.4
2054.0     0.200    223.4
2055.0     0.167    211.0
2056.0     0.133    192.2
2057.0     0.107    162.3
2058.0     0.108    124.5
2059.0     0.136     95.3
2060.0     0.173     77.5
2061.0     0.210     66.0
2062.0     0.244     57.9
2063.0     0.274     51.7
2064.0     0.302     46.7
2065.0     0.326     42.5
2066.0     0.348     38.8
2067.0     0.368     35.6
2068.0     0.386     32.6
2069.0     0.402     29.9
2070.0     0.417     27.5

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.