Double Star Calculator - Orbit

Orbital Elements for A2784AB
WDS: A2784AB WDS ID/Discoverer
P: 400.100 Orbital period (years)
a: 0.407 Semi-major axis (arcseconds)
i: 44.0 Inclination (degrees)
Ω: 139.7 Longitude of ascending node (degrees)
T: 1895.600 Epoch of periastron passage (year)
e: 0.12 Eccentricity
ω: 276.6 Longitude of periastron (degrees)
Start-Year: 1824.95 Year
End-Year: 2225.05 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A2784AB
Position: 164646.24+082231.6 Epoch-2000 right ascension and declination
WDS-ID: 16468+0821 WDS designation
Discoverer Code: A2784AB Discover designation and components
ADS number: 10206 Aitken Double Star catalog
HD number: 151389 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.8 Magnitude of the primary
V2: 11.0 Magnitude of the secondary
Equinox: Equinox
Date: 2020 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: Lin2022b Reference

Double Star Orbit for A2784AB



WDS 6th Orbit including measures of A2784AB

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Ephemeris of A2784AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.377   176.07
--------------------------
1824.95    0.379   334.34
1825.95    0.377   335.08
1826.95    0.376   335.83
1827.95    0.374   336.59
1828.95    0.372   337.36
1829.95    0.370   338.13
1830.95    0.368   338.91
1831.95    0.366   339.71
1832.95    0.364   340.51
1833.95    0.362   341.32
1834.95    0.359   342.13
1835.95    0.357   342.96
1836.95    0.355   343.80
1837.95    0.353   344.65
1838.95    0.350   345.51
1839.95    0.348   346.39
1840.95    0.346   347.27
1841.95    0.344   348.17
1842.95    0.341   349.07
1843.95    0.339   350.00
1844.95    0.336   350.93
1845.95    0.334   351.88
1846.95    0.332   352.84
1847.95    0.329   353.81
1848.95    0.327   354.80
1849.95    0.324   355.81
1850.95    0.322   356.83
1851.95    0.319   357.86
1852.95    0.317   358.92
1853.95    0.314   359.98
1854.95    0.312     1.07
1855.95    0.310     2.17
1856.95    0.307     3.29
1857.95    0.305     4.42
1858.95    0.302     5.58
1859.95    0.300     6.75
1860.95    0.298     7.94
1861.95    0.296     9.15
1862.95    0.293    10.38
1863.95    0.291    11.63
1864.95    0.289    12.89
1865.95    0.287    14.18
1866.95    0.285    15.48
1867.95    0.283    16.80
1868.95    0.281    18.14
1869.95    0.279    19.50
1870.95    0.277    20.88
1871.95    0.275    22.28
1872.95    0.273    23.70
1873.95    0.272    25.13
1874.95    0.270    26.58
1875.95    0.269    28.04
1876.95    0.267    29.52
1877.95    0.266    31.02
1878.95    0.265    32.53
1879.95    0.264    34.06
1880.95    0.263    35.59
1881.95    0.262    37.14
1882.95    0.261    38.70
1883.95    0.260    40.27
1884.95    0.259    41.85
1885.95    0.259    43.43
1886.95    0.258    45.02
1887.95    0.258    46.62
1888.95    0.258    48.22
1889.95    0.258    49.82
1890.95    0.258    51.42
1891.95    0.258    53.02
1892.95    0.258    54.62
1893.95    0.258    56.22
1894.95    0.259    57.81
1895.95    0.259    59.39
1896.95    0.260    60.97
1897.95    0.261    62.54
1898.95    0.262    64.10
1899.95    0.263    65.65
1900.95    0.264    67.19
1901.95    0.265    68.71
1902.95    0.266    70.22
1903.95    0.267    71.72
1904.95    0.269    73.20
1905.95    0.270    74.67
1906.95    0.272    76.12
1907.95    0.273    77.56
1908.95    0.275    78.97
1909.95    0.277    80.37
1910.95    0.279    81.75
1911.95    0.280    83.11
1912.95    0.282    84.46
1913.95    0.284    85.78
1914.95    0.286    87.09
1915.95    0.289    88.38
1916.95    0.291    89.65
1917.95    0.293    90.90
1918.95    0.295    92.13
1919.95    0.297    93.34
1920.95    0.300    94.54
1921.95    0.302    95.72
1922.95    0.304    96.88
1923.95    0.306    98.02
1924.95    0.309    99.14
1925.95    0.311   100.25
1926.95    0.314   101.34
1927.95    0.316   102.42
1928.95    0.318   103.48
1929.95    0.321   104.52
1930.95    0.323   105.55
1931.95    0.325   106.56
1932.95    0.328   107.56
1933.95    0.330   108.54
1934.95    0.332   109.51
1935.95    0.335   110.47
1936.95    0.337   111.41
1937.95    0.339   112.34
1938.95    0.342   113.26
1939.95    0.344   114.17
1940.95    0.346   115.06
1941.95    0.348   115.95
1942.95    0.350   116.82
1943.95    0.352   117.68
1944.95    0.354   118.54
1945.95    0.356   119.38
1946.95    0.359   120.21
1947.95    0.360   121.03
1948.95    0.362   121.85
1949.95    0.364   122.66
1950.95    0.366   123.45
1951.95    0.368   124.24
1952.95    0.370   125.03
1953.95    0.372   125.80
1954.95    0.373   126.57
1955.95    0.375   127.33
1956.95    0.376   128.08
1957.95    0.378   128.83
1958.95    0.379   129.57
1959.95    0.381   130.31
1960.95    0.382   131.04
1961.95    0.384   131.77
1962.95    0.385   132.49
1963.95    0.386   133.20
1964.95    0.388   133.91
1965.95    0.389   134.62
1966.95    0.390   135.32
1967.95    0.391   136.02
1968.95    0.392   136.72
1969.95    0.393   137.41
1970.95    0.394   138.09
1971.95    0.395   138.78
1972.95    0.395   139.46
1973.95    0.396   140.14
1974.95    0.397   140.82
1975.95    0.398   141.49
1976.95    0.398   142.17
1977.95    0.399   142.84
1978.95    0.399   143.50
1979.95    0.400   144.17
1980.95    0.400   144.84
1981.95    0.400   145.50
1982.95    0.401   146.17
1983.95    0.401   146.83
1984.95    0.401   147.49
1985.95    0.401   148.15
1986.95    0.402   148.81
1987.95    0.402   149.47
1988.95    0.402   150.13
1989.95    0.402   150.79
1990.95    0.402   151.45
1991.95    0.401   152.11
1992.95    0.401   152.77
1993.95    0.401   153.43
1994.95    0.401   154.09
1995.95    0.401   154.76
1996.95    0.400   155.42
1997.95    0.400   156.08
1998.95    0.400   156.75
1999.95    0.399   157.42
2000.95    0.399   158.09
2001.95    0.398   158.76
2002.95    0.398   159.43
2003.95    0.397   160.10
2004.95    0.396   160.78
2005.95    0.396   161.46
2006.95    0.395   162.14
2007.95    0.394   162.82
2008.95    0.394   163.51
2009.95    0.393   164.20
2010.95    0.392   164.89
2011.95    0.391   165.58
2012.95    0.390   166.28
2013.95    0.390   166.98
2014.95    0.389   167.68
2015.95    0.388   168.39
2016.95    0.387   169.10
2017.95    0.386   169.81
2018.95    0.385   170.53
2019.95    0.384   171.25
2020.95    0.383   171.97
2021.95    0.382   172.70
2022.95    0.381   173.44
2023.95    0.379   174.17
2024.95    0.378   174.92
2025.95    0.377   175.66
2026.95    0.376   176.41
2027.95    0.375   177.17
2028.95    0.374   177.93
2029.95    0.373   178.69
2030.95    0.371   179.46
2031.95    0.370   180.23
2032.95    0.369   181.01
2033.95    0.368   181.80
2034.95    0.367   182.58
2035.95    0.365   183.38
2036.95    0.364   184.18
2037.95    0.363   184.98
2038.95    0.362   185.79
2039.95    0.361   186.61
2040.95    0.360   187.43
2041.95    0.358   188.26
2042.95    0.357   189.09
2043.95    0.356   189.92
2044.95    0.355   190.77
2045.95    0.354   191.61
2046.95    0.353   192.47
2047.95    0.351   193.33
2048.95    0.350   194.19
2049.95    0.349   195.06
2050.95    0.348   195.94
2051.95    0.347   196.82
2052.95    0.346   197.71
2053.95    0.345   198.60
2054.95    0.344   199.49
2055.95    0.343   200.40
2056.95    0.342   201.30
2057.95    0.341   202.22
2058.95    0.340   203.13
2059.95    0.339   204.06
2060.95    0.338   204.98
2061.95    0.338   205.92
2062.95    0.337   206.85
2063.95    0.336   207.79
2064.95    0.335   208.74
2065.95    0.334   209.69
2066.95    0.334   210.64
2067.95    0.333   211.60
2068.95    0.333   212.56
2069.95    0.332   213.52
2070.95    0.331   214.49
2071.95    0.331   215.46
2072.95    0.330   216.44
2073.95    0.330   217.41
2074.95    0.330   218.39
2075.95    0.329   219.37
2076.95    0.329   220.36
2077.95    0.329   221.34
2078.95    0.328   222.33
2079.95    0.328   223.32
2080.95    0.328   224.31
2081.95    0.328   225.30
2082.95    0.328   226.29
2083.95    0.328   227.28
2084.95    0.328   228.27
2085.95    0.328   229.27
2086.95    0.328   230.26
2087.95    0.328   231.25
2088.95    0.328   232.24
2089.95    0.328   233.23
2090.95    0.328   234.22
2091.95    0.329   235.20
2092.95    0.329   236.19
2093.95    0.329   237.17
2094.95    0.330   238.15
2095.95    0.330   239.13
2096.95    0.331   240.11
2097.95    0.331   241.08
2098.95    0.332   242.05
2099.95    0.332   243.02
2100.95    0.333   243.98
2101.95    0.333   244.94
2102.95    0.334   245.89
2103.95    0.335   246.85
2104.95    0.336   247.79
2105.95    0.336   248.74
2106.95    0.337   249.68
2107.95    0.338   250.61
2108.95    0.339   251.54
2109.95    0.340   252.47
2110.95    0.341   253.39
2111.95    0.342   254.30
2112.95    0.343   255.21
2113.95    0.344   256.11
2114.95    0.345   257.01
2115.95    0.346   257.91
2116.95    0.347   258.80
2117.95    0.348   259.68
2118.95    0.349   260.56
2119.95    0.350   261.43
2120.95    0.351   262.29
2121.95    0.352   263.15
2122.95    0.354   264.01
2123.95    0.355   264.85
2124.95    0.356   265.70
2125.95    0.357   266.53
2126.95    0.358   267.37
2127.95    0.360   268.19
2128.95    0.361   269.01
2129.95    0.362   269.83
2130.95    0.363   270.63
2131.95    0.365   271.44
2132.95    0.366   272.23
2133.95    0.367   273.03
2134.95    0.369   273.81
2135.95    0.370   274.59
2136.95    0.371   275.37
2137.95    0.372   276.14
2138.95    0.374   276.90
2139.95    0.375   277.66
2140.95    0.376   278.42
2141.95    0.378   279.17
2142.95    0.379   279.91
2143.95    0.380   280.65
2144.95    0.381   281.38
2145.95    0.383   282.11
2146.95    0.384   282.84
2147.95    0.385   283.56
2148.95    0.386   284.27
2149.95    0.387   284.99
2150.95    0.389   285.69
2151.95    0.390   286.40
2152.95    0.391   287.09
2153.95    0.392   287.79
2154.95    0.393   288.48
2155.95    0.394   289.17
2156.95    0.395   289.85
2157.95    0.396   290.53
2158.95    0.397   291.21
2159.95    0.398   291.88
2160.95    0.399   292.55
2161.95    0.400   293.22
2162.95    0.401   293.88
2163.95    0.402   294.54
2164.95    0.403   295.20
2165.95    0.404   295.85
2166.95    0.404   296.50
2167.95    0.405   297.15
2168.95    0.406   297.80
2169.95    0.407   298.45
2170.95    0.407   299.09
2171.95    0.408   299.73
2172.95    0.408   300.37
2173.95    0.409   301.01
2174.95    0.410   301.64
2175.95    0.410   302.27
2176.95    0.411   302.91
2177.95    0.411   303.54
2178.95    0.411   304.17
2179.95    0.412   304.80
2180.95    0.412   305.42
2181.95    0.412   306.05
2182.95    0.412   306.68
2183.95    0.413   307.30
2184.95    0.413   307.93
2185.95    0.413   308.55
2186.95    0.413   309.18
2187.95    0.413   309.80
2188.95    0.413   310.42
2189.95    0.413   311.05
2190.95    0.413   311.67
2191.95    0.412   312.30
2192.95    0.412   312.93
2193.95    0.412   313.55
2194.95    0.412   314.18
2195.95    0.411   314.81
2196.95    0.411   315.44
2197.95    0.410   316.07
2198.95    0.410   316.70
2199.95    0.409   317.34
2200.95    0.409   317.98
2201.95    0.408   318.61
2202.95    0.407   319.25
2203.95    0.407   319.90
2204.95    0.406   320.54
2205.95    0.405   321.19
2206.95    0.404   321.84
2207.95    0.403   322.50
2208.95    0.402   323.15
2209.95    0.401   323.81
2210.95    0.400   324.48
2211.95    0.399   325.14
2212.95    0.397   325.82
2213.95    0.396   326.49
2214.95    0.395   327.17
2215.95    0.394   327.86
2216.95    0.392   328.55
2217.95    0.391   329.24
2218.95    0.389   329.94
2219.95    0.388   330.65
2220.95    0.386   331.36
2221.95    0.385   332.07
2222.95    0.383   332.80
2223.95    0.381   333.53
2224.95    0.379   334.26






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 17:30:53



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