Double Star Calculator - Orbit

Orbital Elements for WOR9AB
WDS: WOR9AB WDS ID/Discoverer
P: 210.090 Orbital period (years)
a: 1.421 Semi-major axis (arcseconds)
i: 108.0 Inclination (degrees)
Ω: 154.3 Longitude of ascending node (degrees)
T: 1937.470 Epoch of periastron passage (year)
e: 0.15 Eccentricity
ω: 130.8 Longitude of periastron (degrees)
Start-Year: 1919.955 Year
End-Year: 2130.045 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for WOR9AB
Position: 203010.63+265033.7 Epoch-2000 right ascension and declination
WDS-ID: 20302+2651 WDS designation
Discoverer Code: WOR9AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 340345 HD catalog number
Hipparcos number: 101150 Hipparcos catalog number
V1: 10.50 Magnitude of the primary
V2: 10.63 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1996 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Zir2003 Reference

Double Star Orbit for WOR9AB



WDS 6th Orbit including measures of WOR9AB

-- 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 WOR9AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.727   194.44
--------------------------
1919.95    0.385    62.38
1920.95    0.388    55.30
1921.95    0.396    48.41
1922.95    0.409    41.88
1923.95    0.427    35.82
1924.95    0.448    30.29
1925.95    0.473    25.29
1926.95    0.500    20.81
1927.95    0.529    16.80
1928.95    0.559    13.23
1929.95    0.591    10.03
1930.95    0.623     7.16
1931.95    0.657     4.57
1932.95    0.690     2.24
1933.95    0.723     0.12
1934.95    0.756   358.19
1935.95    0.789   356.42
1936.95    0.822   354.79
1937.95    0.854   353.28
1938.95    0.885   351.88
1939.95    0.915   350.58
1940.95    0.945   349.35
1941.95    0.973   348.20
1942.95    1.001   347.12
1943.95    1.027   346.09
1944.95    1.052   345.11
1945.95    1.076   344.18
1946.95    1.099   343.29
1947.95    1.121   342.43
1948.95    1.141   341.60
1949.95    1.159   340.80
1950.95    1.177   340.03
1951.95    1.193   339.28
1952.95    1.207   338.54
1953.95    1.220   337.82
1954.95    1.232   337.12
1955.95    1.242   336.43
1956.95    1.251   335.75
1957.95    1.258   335.08
1958.95    1.264   334.41
1959.95    1.269   333.76
1960.95    1.272   333.10
1961.95    1.273   332.45
1962.95    1.273   331.80
1963.95    1.272   331.14
1964.95    1.270   330.49
1965.95    1.266   329.83
1966.95    1.261   329.17
1967.95    1.254   328.50
1968.95    1.246   327.82
1969.95    1.237   327.14
1970.95    1.227   326.44
1971.95    1.216   325.73
1972.95    1.204   325.01
1973.95    1.190   324.27
1974.95    1.176   323.52
1975.95    1.160   322.74
1976.95    1.144   321.95
1977.95    1.126   321.13
1978.95    1.108   320.28
1979.95    1.089   319.40
1980.95    1.069   318.50
1981.95    1.049   317.55
1982.95    1.027   316.57
1983.95    1.006   315.55
1984.95    0.983   314.48
1985.95    0.960   313.36
1986.95    0.937   312.19
1987.95    0.913   310.95
1988.95    0.889   309.65
1989.95    0.864   308.27
1990.95    0.840   306.81
1991.95    0.815   305.27
1992.95    0.790   303.62
1993.95    0.765   301.87
1994.95    0.741   300.01
1995.95    0.716   298.02
1996.95    0.692   295.88
1997.95    0.669   293.60
1998.95    0.646   291.15
1999.95    0.624   288.53
2000.95    0.603   285.72
2001.95    0.583   282.71
2002.95    0.564   279.49
2003.95    0.547   276.06
2004.95    0.531   272.42
2005.95    0.518   268.57
2006.95    0.506   264.53
2007.95    0.497   260.32
2008.95    0.490   255.97
2009.95    0.486   251.52
2010.95    0.484   247.02
2011.95    0.485   242.51
2012.95    0.489   238.04
2013.95    0.495   233.67
2014.95    0.504   229.42
2015.95    0.515   225.34
2016.95    0.528   221.45
2017.95    0.543   217.76
2018.95    0.560   214.29
2019.95    0.579   211.03
2020.95    0.599   207.98
2021.95    0.620   205.13
2022.95    0.642   202.47
2023.95    0.665   200.00
2024.95    0.689   197.69
2025.95    0.714   195.54
2026.95    0.739   193.54
2027.95    0.764   191.67
2028.95    0.790   189.92
2029.95    0.816   188.27
2030.95    0.842   186.73
2031.95    0.868   185.29
2032.95    0.894   183.93
2033.95    0.920   182.64
2034.95    0.946   181.43
2035.95    0.972   180.28
2036.95    0.997   179.18
2037.95    1.023   178.15
2038.95    1.048   177.16
2039.95    1.073   176.22
2040.95    1.097   175.32
2041.95    1.121   174.46
2042.95    1.144   173.64
2043.95    1.168   172.85
2044.95    1.190   172.09
2045.95    1.212   171.35
2046.95    1.234   170.65
2047.95    1.255   169.97
2048.95    1.276   169.31
2049.95    1.296   168.67
2050.95    1.315   168.05
2051.95    1.334   167.44
2052.95    1.352   166.86
2053.95    1.369   166.29
2054.95    1.386   165.73
2055.95    1.402   165.18
2056.95    1.417   164.65
2057.95    1.431   164.13
2058.95    1.445   163.62
2059.95    1.458   163.12
2060.95    1.470   162.63
2061.95    1.482   162.14
2062.95    1.493   161.66
2063.95    1.502   161.19
2064.95    1.511   160.73
2065.95    1.519   160.26
2066.95    1.527   159.81
2067.95    1.533   159.36
2068.95    1.538   158.91
2069.95    1.543   158.46
2070.95    1.547   158.02
2071.95    1.549   157.58
2072.95    1.551   157.14
2073.95    1.552   156.70
2074.95    1.552   156.26
2075.95    1.551   155.82
2076.95    1.549   155.38
2077.95    1.546   154.94
2078.95    1.542   154.50
2079.95    1.537   154.05
2080.95    1.531   153.60
2081.95    1.524   153.15
2082.95    1.516   152.69
2083.95    1.507   152.23
2084.95    1.497   151.76
2085.95    1.486   151.29
2086.95    1.475   150.81
2087.95    1.462   150.31
2088.95    1.448   149.82
2089.95    1.433   149.31
2090.95    1.417   148.78
2091.95    1.399   148.25
2092.95    1.381   147.70
2093.95    1.362   147.14
2094.95    1.342   146.57
2095.95    1.321   145.97
2096.95    1.299   145.35
2097.95    1.276   144.72
2098.95    1.253   144.06
2099.95    1.228   143.37
2100.95    1.202   142.65
2101.95    1.175   141.90
2102.95    1.148   141.12
2103.95    1.120   140.30
2104.95    1.090   139.43
2105.95    1.061   138.52
2106.95    1.030   137.55
2107.95    0.999   136.52
2108.95    0.967   135.43
2109.95    0.934   134.26
2110.95    0.901   133.00
2111.95    0.867   131.65
2112.95    0.833   130.18
2113.95    0.799   128.59
2114.95    0.764   126.86
2115.95    0.730   124.97
2116.95    0.695   122.88
2117.95    0.661   120.58
2118.95    0.627   118.03
2119.95    0.594   115.19
2120.95    0.561   112.01
2121.95    0.530   108.46
2122.95    0.501   104.48
2123.95    0.474   100.02
2124.95    0.449    95.05
2125.95    0.428    89.53
2126.95    0.410    83.49
2127.95    0.397    76.98
2128.95    0.388    70.10
2129.95    0.385    63.02






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 18:15:34



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