Double Star Calculator - Orbit

Orbital Elements for L11
WDS: L11 WDS ID/Discoverer
P: 254.900 Orbital period (years)
a: 1.18 Semi-major axis (arcseconds)
i: 117.0 Inclination (degrees)
Ω: 246.0 Longitude of ascending node (degrees)
T: 2075.000 Epoch of periastron passage (year)
e: 0.65 Eccentricity
ω: 92.0 Longitude of periastron (degrees)
Start-Year: 1897.55 Year
End-Year: 2152.45 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for L11
Position: 112918.83+302528.3 Epoch-2000 right ascension and declination
WDS-ID: 11293+3025 WDS designation
Discoverer Code: L11 Discover designation and components
ADS number: 8177 Aitken Double Star catalog
HD number: 99832 HD catalog number
Hipparcos number: 56054 Hipparcos catalog number
V1: 7.22 Magnitude of the primary
V2: 10.35 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2013 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: RAO2015 Reference

Double Star Orbit for L11



WDS 6th Orbit including measures of L11

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


Legend:
Green plus signs:Visual (micrometric) measures
Violet asterisks:Photographic measures
Blue symbols:Various interferometric techniques
Dot-dash line:Indicates the line of nodes

Ephemeris of L11
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.019   273.39
--------------------------
1897.55    0.935    13.72
1898.55    0.933    12.94
1899.55    0.931    12.16
1900.55    0.929    11.37
1901.55    0.927    10.59
1902.55    0.925     9.80
1903.55    0.923     9.00
1904.55    0.921     8.20
1905.55    0.919     7.40
1906.55    0.917     6.60
1907.55    0.915     5.79
1908.55    0.913     4.98
1909.55    0.911     4.16
1910.55    0.910     3.34
1911.55    0.908     2.52
1912.55    0.906     1.70
1913.55    0.904     0.87
1914.55    0.903     0.04
1915.55    0.901   359.20
1916.55    0.899   358.37
1917.55    0.898   357.53
1918.55    0.896   356.68
1919.55    0.895   355.84
1920.55    0.894   354.99
1921.55    0.892   354.14
1922.55    0.891   353.29
1923.55    0.890   352.43
1924.55    0.889   351.57
1925.55    0.888   350.71
1926.55    0.887   349.85
1927.55    0.886   348.99
1928.55    0.885   348.13
1929.55    0.885   347.26
1930.55    0.884   346.39
1931.55    0.884   345.52
1932.55    0.883   344.65
1933.55    0.883   343.78
1934.55    0.882   342.91
1935.55    0.882   342.04
1936.55    0.882   341.17
1937.55    0.882   340.30
1938.55    0.882   339.43
1939.55    0.882   338.55
1940.55    0.882   337.68
1941.55    0.883   336.81
1942.55    0.883   335.94
1943.55    0.883   335.07
1944.55    0.884   334.20
1945.55    0.885   333.33
1946.55    0.885   332.47
1947.55    0.886   331.60
1948.55    0.887   330.74
1949.55    0.888   329.88
1950.55    0.889   329.02
1951.55    0.890   328.16
1952.55    0.891   327.30
1953.55    0.892   326.45
1954.55    0.894   325.60
1955.55    0.895   324.75
1956.55    0.897   323.91
1957.55    0.898   323.06
1958.55    0.900   322.22
1959.55    0.901   321.39
1960.55    0.903   320.55
1961.55    0.905   319.72
1962.55    0.907   318.90
1963.55    0.909   318.07
1964.55    0.911   317.25
1965.55    0.913   316.44
1966.55    0.915   315.62
1967.55    0.917   314.82
1968.55    0.919   314.01
1969.55    0.922   313.21
1970.55    0.924   312.41
1971.55    0.926   311.62
1972.55    0.929   310.83
1973.55    0.931   310.05
1974.55    0.934   309.27
1975.55    0.936   308.49
1976.55    0.939   307.72
1977.55    0.941   306.95
1978.55    0.944   306.19
1979.55    0.946   305.43
1980.55    0.949   304.67
1981.55    0.952   303.92
1982.55    0.954   303.18
1983.55    0.957   302.43
1984.55    0.960   301.69
1985.55    0.962   300.96
1986.55    0.965   300.23
1987.55    0.968   299.50
1988.55    0.970   298.78
1989.55    0.973   298.06
1990.55    0.976   297.35
1991.55    0.978   296.64
1992.55    0.981   295.93
1993.55    0.983   295.23
1994.55    0.986   294.53
1995.55    0.988   293.83
1996.55    0.991   293.14
1997.55    0.993   292.45
1998.55    0.996   291.76
1999.55    0.998   291.08
2000.55    1.000   290.40
2001.55    1.002   289.72
2002.55    1.004   289.05
2003.55    1.006   288.38
2004.55    1.008   287.71
2005.55    1.010   287.04
2006.55    1.012   286.38
2007.55    1.014   285.72
2008.55    1.015   285.06
2009.55    1.017   284.40
2010.55    1.018   283.75
2011.55    1.019   283.09
2012.55    1.021   282.44
2013.55    1.022   281.79
2014.55    1.022   281.14
2015.55    1.023   280.49
2016.55    1.024   279.84
2017.55    1.024   279.20
2018.55    1.024   278.55
2019.55    1.024   277.90
2020.55    1.024   277.26
2021.55    1.024   276.61
2022.55    1.023   275.96
2023.55    1.022   275.31
2024.55    1.021   274.66
2025.55    1.020   274.01
2026.55    1.019   273.36
2027.55    1.017   272.70
2028.55    1.015   272.05
2029.55    1.013   271.39
2030.55    1.010   270.72
2031.55    1.007   270.06
2032.55    1.004   269.39
2033.55    1.000   268.71
2034.55    0.996   268.03
2035.55    0.992   267.34
2036.55    0.987   266.65
2037.55    0.982   265.95
2038.55    0.976   265.24
2039.55    0.970   264.53
2040.55    0.964   263.80
2041.55    0.957   263.06
2042.55    0.949   262.32
2043.55    0.941   261.56
2044.55    0.932   260.78
2045.55    0.922   259.99
2046.55    0.912   259.19
2047.55    0.901   258.36
2048.55    0.889   257.52
2049.55    0.877   256.65
2050.55    0.864   255.75
2051.55    0.849   254.82
2052.55    0.834   253.87
2053.55    0.818   252.87
2054.55    0.800   251.84
2055.55    0.781   250.75
2056.55    0.762   249.61
2057.55    0.740   248.41
2058.55    0.717   247.13
2059.55    0.693   245.77
2060.55    0.667   244.30
2061.55    0.639   242.71
2062.55    0.610   240.97
2063.55    0.578   239.05
2064.55    0.545   236.90
2065.55    0.509   234.45
2066.55    0.471   231.62
2067.55    0.432   228.29
2068.55    0.391   224.27
2069.55    0.348   219.29
2070.55    0.306   212.92
2071.55    0.265   204.54
2072.55    0.229   193.31
2073.55    0.201   178.45
2074.55    0.188   160.27
2075.55    0.193   141.25
2076.55    0.214   124.61
2077.55    0.247   111.68
2078.55    0.286   102.01
2079.55    0.327    94.75
2080.55    0.369    89.13
2081.55    0.411    84.66
2082.55    0.450    80.99
2083.55    0.488    77.90
2084.55    0.524    75.25
2085.55    0.557    72.93
2086.55    0.589    70.86
2087.55    0.618    69.00
2088.55    0.645    67.30
2089.55    0.671    65.73
2090.55    0.694    64.27
2091.55    0.716    62.91
2092.55    0.737    61.63
2093.55    0.756    60.41
2094.55    0.774    59.25
2095.55    0.790    58.14
2096.55    0.806    57.08
2097.55    0.820    56.05
2098.55    0.833    55.06
2099.55    0.846    54.09
2100.55    0.857    53.16
2101.55    0.868    52.25
2102.55    0.878    51.36
2103.55    0.887    50.48
2104.55    0.895    49.63
2105.55    0.903    48.79
2106.55    0.910    47.96
2107.55    0.917    47.15
2108.55    0.923    46.35
2109.55    0.929    45.56
2110.55    0.934    44.78
2111.55    0.938    44.00
2112.55    0.943    43.23
2113.55    0.947    42.47
2114.55    0.950    41.72
2115.55    0.953    40.97
2116.55    0.956    40.23
2117.55    0.958    39.48
2118.55    0.961    38.75
2119.55    0.962    38.01
2120.55    0.964    37.28
2121.55    0.965    36.55
2122.55    0.966    35.83
2123.55    0.967    35.10
2124.55    0.968    34.38
2125.55    0.968    33.65
2126.55    0.969    32.93
2127.55    0.969    32.21
2128.55    0.969    31.48
2129.55    0.968    30.76
2130.55    0.968    30.04
2131.55    0.967    29.31
2132.55    0.967    28.59
2133.55    0.966    27.86
2134.55    0.965    27.13
2135.55    0.964    26.40
2136.55    0.963    25.67
2137.55    0.961    24.94
2138.55    0.960    24.20
2139.55    0.959    23.47
2140.55    0.957    22.73
2141.55    0.956    21.99
2142.55    0.954    21.24
2143.55    0.952    20.49
2144.55    0.950    19.75
2145.55    0.949    18.99
2146.55    0.947    18.24
2147.55    0.945    17.48
2148.55    0.943    16.72
2149.55    0.941    15.95
2150.55    0.939    15.18
2151.55    0.937    14.41






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 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.


Report Information
Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 16:38:54



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