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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 18:39:54

Orbital Elements for COU311
WDS: COU311 WDS ID/Discoverer
P: 157.890 Orbital period (years)
a: 0.263 Semi-major axis (arcseconds)
i: 44.0 Inclination (degrees)
Ω: 95.1 Longitude of ascending node (degrees)
T: 1950.240 Epoch of periastron passage (year)
e: 0.55 Eccentricity
ω: 217.2 Longitude of periastron (degrees)
Start-Year: 1947.0 Year
End-Year: 2103.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU311
Position: 163705.87+173154.0 Epoch-2000 right ascension and declination
WDS-ID: 16371+1732 WDS designation
Discoverer Code: COU311 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 10.3 Magnitude of the primary
V2: 10.3 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for COU311



WDS 6th Orbit including measures of COU311

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


Ephemeris of COU311
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.375    120.9
-------------------------
1947.0     0.124    280.6
1948.0     0.119    287.1
1949.0     0.114    294.1
1950.0     0.109    301.8
1951.0     0.104    310.2
1952.0     0.100    319.4
1953.0     0.096    329.3
1954.0     0.095    339.6
1955.0     0.095    350.2
1956.0     0.097      0.4
1957.0     0.101     10.1
1958.0     0.107     18.8
1959.0     0.114     26.6
1960.0     0.121     33.5
1961.0     0.130     39.5
1962.0     0.139     44.8
1963.0     0.148     49.4
1964.0     0.157     53.5
1965.0     0.166     57.1
1966.0     0.176     60.3
1967.0     0.185     63.3
1968.0     0.193     65.9
1969.0     0.202     68.3
1970.0     0.211     70.6
1971.0     0.219     72.6
1972.0     0.227     74.5
1973.0     0.235     76.3
1974.0     0.242     78.0
1975.0     0.250     79.5
1976.0     0.257     81.0
1977.0     0.263     82.4
1978.0     0.270     83.7
1979.0     0.276     85.0
1980.0     0.282     86.2
1981.0     0.288     87.4
1982.0     0.294     88.5
1983.0     0.299     89.6
1984.0     0.305     90.6
1985.0     0.310     91.6
1986.0     0.314     92.6
1987.0     0.319     93.5
1988.0     0.323     94.5
1989.0     0.328     95.4
1990.0     0.332     96.2
1991.0     0.336     97.1
1992.0     0.339     97.9
1993.0     0.343     98.7
1994.0     0.346     99.5
1995.0     0.349    100.3
1996.0     0.352    101.1
1997.0     0.355    101.8
1998.0     0.357    102.6
1999.0     0.360    103.3
2000.0     0.362    104.1
2001.0     0.364    104.8
2002.0     0.366    105.5
2003.0     0.368    106.2
2004.0     0.370    106.9
2005.0     0.371    107.6
2006.0     0.373    108.3
2007.0     0.374    108.9
2008.0     0.375    109.6
2009.0     0.376    110.3
2010.0     0.377    110.9
2011.0     0.378    111.6
2012.0     0.378    112.3
2013.0     0.379    112.9
2014.0     0.379    113.6
2015.0     0.379    114.3
2016.0     0.380    114.9
2017.0     0.379    115.6
2018.0     0.379    116.2
2019.0     0.379    116.9
2020.0     0.379    117.5
2021.0     0.378    118.2
2022.0     0.378    118.9
2023.0     0.377    119.5
2024.0     0.376    120.2
2025.0     0.375    120.9
2026.0     0.374    121.6
2027.0     0.373    122.2
2028.0     0.372    122.9
2029.0     0.370    123.6
2030.0     0.369    124.3
2031.0     0.367    125.0
2032.0     0.365    125.7
2033.0     0.364    126.4
2034.0     0.362    127.1
2035.0     0.360    127.9
2036.0     0.358    128.6
2037.0     0.356    129.3
2038.0     0.353    130.1
2039.0     0.351    130.9
2040.0     0.349    131.6
2041.0     0.346    132.4
2042.0     0.343    133.2
2043.0     0.341    134.0
2044.0     0.338    134.9
2045.0     0.335    135.7
2046.0     0.332    136.5
2047.0     0.329    137.4
2048.0     0.326    138.3
2049.0     0.323    139.2
2050.0     0.319    140.1
2051.0     0.316    141.1
2052.0     0.313    142.0
2053.0     0.309    143.0
2054.0     0.306    144.0
2055.0     0.302    145.0
2056.0     0.298    146.1
2057.0     0.294    147.2
2058.0     0.291    148.3
2059.0     0.287    149.4
2060.0     0.283    150.6
2061.0     0.279    151.8
2062.0     0.275    153.0
2063.0     0.271    154.3
2064.0     0.267    155.6
2065.0     0.262    156.9
2066.0     0.258    158.3
2067.0     0.254    159.8
2068.0     0.250    161.3
2069.0     0.245    162.8
2070.0     0.241    164.4
2071.0     0.237    166.1
2072.0     0.233    167.8
2073.0     0.228    169.6
2074.0     0.224    171.4
2075.0     0.220    173.4
2076.0     0.216    175.4
2077.0     0.211    177.4
2078.0     0.207    179.6
2079.0     0.203    181.9
2080.0     0.199    184.2
2081.0     0.195    186.6
2082.0     0.191    189.2
2083.0     0.188    191.8
2084.0     0.184    194.6
2085.0     0.180    197.4
2086.0     0.177    200.4
2087.0     0.174    203.5
2088.0     0.171    206.7
2089.0     0.168    210.0
2090.0     0.165    213.4
2091.0     0.162    216.9
2092.0     0.159    220.6
2093.0     0.157    224.4
2094.0     0.155    228.3
2095.0     0.152    232.3
2096.0     0.150    236.4
2097.0     0.148    240.7
2098.0     0.146    245.1
2099.0     0.143    249.6
2100.0     0.141    254.3
2101.0     0.138    259.2
2102.0     0.135    264.3



 

Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 4.0.


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.


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