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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:07:05

Orbital Elements for COU390

WDS:	COU390	WDS ID/Discoverer
P:	92.750	Orbital period (years)
a:	0.5498	Semi-major axis (arcseconds)
i:	43.6	Inclination (degrees)
Ω:	231.4	Longitude of ascending node (degrees)
T:	2007.860	Epoch of periastron passage (year)
e:	0.786	Eccentricity
ω:	100.9	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 COU390

Position:	114230.32+235422.9	Epoch-2000 right ascension and declination
WDS-ID:	11425+2355	WDS designation
Discoverer Code:	COU390	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	101728	HD catalog number
Hipparcos number:	57112	Hipparcos catalog number
V1:	9.27	Magnitude of the primary
V2:	11.66	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU390

WDS 6th Orbit including measures of COU390

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

Ephemeris of COU390

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.519    118.8
-------------------------
1979.0     0.690    174.2
1980.0     0.684    175.3
1981.0     0.678    176.5
1982.0     0.671    177.6
1983.0     0.663    178.8
1984.0     0.655    180.0
1985.0     0.646    181.2
1986.0     0.637    182.5
1987.0     0.626    183.8
1988.0     0.616    185.2
1989.0     0.604    186.6
1990.0     0.592    188.1
1991.0     0.578    189.6
1992.0     0.564    191.2
1993.0     0.549    192.9
1994.0     0.532    194.7
1995.0     0.515    196.6
1996.0     0.496    198.7
1997.0     0.476    200.9
1998.0     0.453    203.4
1999.0     0.429    206.0
2000.0     0.403    209.1
2001.0     0.374    212.6
2002.0     0.342    216.6
2003.0     0.306    221.6
2004.0     0.266    228.1
2005.0     0.218    237.1
2006.0     0.164    251.7
2007.0     0.107    282.1
2008.0     0.089    345.8
2009.0     0.135     31.4
2010.0     0.185     52.2
2011.0     0.227     64.6
2012.0     0.262     73.4
2013.0     0.293     80.2
2014.0     0.320     85.8
2015.0     0.345     90.5
2016.0     0.367     94.7
2017.0     0.388     98.3
2018.0     0.408    101.7
2019.0     0.427    104.7
2020.0     0.444    107.4
2021.0     0.461    110.0
2022.0     0.476    112.4
2023.0     0.491    114.7
2024.0     0.505    116.8
2025.0     0.519    118.8
2026.0     0.532    120.7
2027.0     0.545    122.5
2028.0     0.557    124.2
2029.0     0.568    125.9
2030.0     0.579    127.5
2031.0     0.589    129.0
2032.0     0.599    130.5
2033.0     0.609    131.9
2034.0     0.618    133.3
2035.0     0.627    134.7
2036.0     0.635    136.0
2037.0     0.643    137.3
2038.0     0.651    138.6
2039.0     0.658    139.8
2040.0     0.665    141.0
2041.0     0.671    142.2
2042.0     0.677    143.3
2043.0     0.683    144.5
2044.0     0.688    145.6
2045.0     0.693    146.7
2046.0     0.698    147.8
2047.0     0.702    148.8
2048.0     0.706    149.9
2049.0     0.710    150.9
2050.0     0.713    152.0
2051.0     0.716    153.0
2052.0     0.718    154.0
2053.0     0.720    155.0
2054.0     0.722    156.1
2055.0     0.724    157.1
2056.0     0.725    158.1
2057.0     0.725    159.1
2058.0     0.726    160.1
2059.0     0.726    161.1
2060.0     0.725    162.1
2061.0     0.725    163.1
2062.0     0.723    164.1
2063.0     0.722    165.1
2064.0     0.720    166.1
2065.0     0.718    167.1
2066.0     0.715    168.1
2067.0     0.712    169.1
2068.0     0.708    170.2
2069.0     0.704    171.2
2070.0     0.699    172.3

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.