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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:30:20

Orbital Elements for A2681
WDS: A2681 WDS ID/Discoverer
P: 208.330 Orbital period (years)
a: 0.273 Semi-major axis (arcseconds)
i: 119.4 Inclination (degrees)
Ω: 118.2 Longitude of ascending node (degrees)
T: 1938.470 Epoch of periastron passage (year)
e: 0.793 Eccentricity
ω: 339.1 Longitude of periastron (degrees)
Start-Year: 1921.0 Year
End-Year: 2129.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2681
Position: 065729.02+025316.8 Epoch-2000 right ascension and declination
WDS-ID: 06575+0253 WDS designation
Discoverer Code: A2681 Discover designation and components
ADS number: 5625 Aitken Double Star catalog
HD number: 51449 HD catalog number
Hipparcos number: 33474 Hipparcos catalog number
V1: 9.46 Magnitude of the primary
V2: 7.71 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1997 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for A2681



WDS 6th Orbit including measures of A2681

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


Ephemeris of A2681
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.441    312.1
-------------------------
1921.0     0.194    283.7
1922.0     0.185    282.6
1923.0     0.175    281.4
1924.0     0.164    280.1
1925.0     0.153    278.6
1926.0     0.142    276.8
1927.0     0.131    274.7
1928.0     0.119    272.3
1929.0     0.107    269.2
1930.0     0.094    265.4
1931.0     0.081    260.4
1932.0     0.068    253.4
1933.0     0.056    243.4
1934.0     0.045    228.1
1935.0     0.038    205.5
1936.0     0.038    177.8
1937.0     0.043    153.4
1938.0     0.050    135.5
1939.0     0.057    122.1
1940.0     0.060    110.9
1941.0     0.061    100.4
1942.0     0.060     89.9
1943.0     0.059     79.1
1944.0     0.059     68.0
1945.0     0.060     57.0
1946.0     0.062     46.4
1947.0     0.065     36.8
1948.0     0.069     28.2
1949.0     0.075     20.8
1950.0     0.081     14.4
1951.0     0.087      8.9
1952.0     0.094      4.2
1953.0     0.101      0.1
1954.0     0.108    356.6
1955.0     0.116    353.6
1956.0     0.123    350.9
1957.0     0.131    348.5
1958.0     0.138    346.3
1959.0     0.145    344.4
1960.0     0.153    342.7
1961.0     0.160    341.1
1962.0     0.167    339.7
1963.0     0.174    338.3
1964.0     0.181    337.1
1965.0     0.188    336.0
1966.0     0.195    334.9
1967.0     0.202    334.0
1968.0     0.208    333.0
1969.0     0.215    332.2
1970.0     0.221    331.4
1971.0     0.227    330.6
1972.0     0.234    329.9
1973.0     0.240    329.2
1974.0     0.246    328.5
1975.0     0.252    327.9
1976.0     0.257    327.3
1977.0     0.263    326.7
1978.0     0.269    326.2
1979.0     0.274    325.7
1980.0     0.280    325.2
1981.0     0.285    324.7
1982.0     0.290    324.2
1983.0     0.296    323.8
1984.0     0.301    323.3
1985.0     0.306    322.9
1986.0     0.311    322.5
1987.0     0.315    322.1
1988.0     0.320    321.7
1989.0     0.325    321.4
1990.0     0.329    321.0
1991.0     0.334    320.7
1992.0     0.338    320.3
1993.0     0.343    320.0
1994.0     0.347    319.7
1995.0     0.351    319.4
1996.0     0.355    319.0
1997.0     0.359    318.7
1998.0     0.363    318.4
1999.0     0.367    318.2
2000.0     0.371    317.9
2001.0     0.374    317.6
2002.0     0.378    317.3
2003.0     0.382    317.1
2004.0     0.385    316.8
2005.0     0.388    316.5
2006.0     0.392    316.3
2007.0     0.395    316.0
2008.0     0.398    315.8
2009.0     0.401    315.6
2010.0     0.404    315.3
2011.0     0.407    315.1
2012.0     0.410    314.9
2013.0     0.413    314.6
2014.0     0.416    314.4
2015.0     0.418    314.2
2016.0     0.421    314.0
2017.0     0.424    313.7
2018.0     0.426    313.5
2019.0     0.429    313.3
2020.0     0.431    313.1
2021.0     0.433    312.9
2022.0     0.435    312.7
2023.0     0.437    312.5
2024.0     0.439    312.3
2025.0     0.441    312.1
2026.0     0.443    311.9
2027.0     0.445    311.7
2028.0     0.447    311.5
2029.0     0.449    311.3
2030.0     0.450    311.1
2031.0     0.452    310.9
2032.0     0.453    310.8
2033.0     0.455    310.6
2034.0     0.456    310.4
2035.0     0.458    310.2
2036.0     0.459    310.0
2037.0     0.460    309.8
2038.0     0.461    309.6
2039.0     0.462    309.5
2040.0     0.463    309.3
2041.0     0.464    309.1
2042.0     0.465    308.9
2043.0     0.466    308.8
2044.0     0.466    308.6
2045.0     0.467    308.4
2046.0     0.467    308.2
2047.0     0.468    308.0
2048.0     0.468    307.9
2049.0     0.469    307.7
2050.0     0.469    307.5
2051.0     0.469    307.3
2052.0     0.469    307.2
2053.0     0.469    307.0
2054.0     0.469    306.8
2055.0     0.469    306.6
2056.0     0.469    306.5
2057.0     0.469    306.3
2058.0     0.468    306.1
2059.0     0.468    305.9
2060.0     0.468    305.8
2061.0     0.467    305.6
2062.0     0.466    305.4
2063.0     0.466    305.2
2064.0     0.465    305.1
2065.0     0.464    304.9
2066.0     0.463    304.7
2067.0     0.462    304.5
2068.0     0.461    304.3
2069.0     0.460    304.2
2070.0     0.459    304.0
2071.0     0.458    303.8
2072.0     0.456    303.6
2073.0     0.455    303.4
2074.0     0.453    303.2
2075.0     0.452    303.0
2076.0     0.450    302.9
2077.0     0.448    302.7
2078.0     0.446    302.5
2079.0     0.444    302.3
2080.0     0.442    302.1
2081.0     0.440    301.9
2082.0     0.438    301.7
2083.0     0.436    301.5
2084.0     0.433    301.3
2085.0     0.431    301.1
2086.0     0.428    300.9
2087.0     0.426    300.7
2088.0     0.423    300.4
2089.0     0.420    300.2
2090.0     0.417    300.0
2091.0     0.414    299.8
2092.0     0.411    299.6
2093.0     0.408    299.3
2094.0     0.404    299.1
2095.0     0.401    298.9
2096.0     0.397    298.6
2097.0     0.393    298.4
2098.0     0.390    298.1
2099.0     0.386    297.9
2100.0     0.382    297.6
2101.0     0.378    297.3
2102.0     0.373    297.1
2103.0     0.369    296.8
2104.0     0.364    296.5
2105.0     0.360    296.2
2106.0     0.355    295.9
2107.0     0.350    295.6
2108.0     0.345    295.3
2109.0     0.340    294.9
2110.0     0.334    294.6
2111.0     0.329    294.2
2112.0     0.323    293.9
2113.0     0.317    293.5
2114.0     0.311    293.1
2115.0     0.305    292.7
2116.0     0.299    292.3
2117.0     0.292    291.9
2118.0     0.286    291.4
2119.0     0.279    290.9
2120.0     0.272    290.4
2121.0     0.264    289.9
2122.0     0.257    289.3
2123.0     0.249    288.7
2124.0     0.241    288.1
2125.0     0.233    287.4
2126.0     0.225    286.6
2127.0     0.216    285.8
2128.0     0.207    285.0






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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