Double Star Calculator - Orbit

Orbital Elements for A1939
WDS: A1939 WDS ID/Discoverer
P: 544.000 Orbital period (years)
a: 0.876 Semi-major axis (arcseconds)
i: 50.8 Inclination (degrees)
Ω: 75.8 Longitude of ascending node (degrees)
T: 2201.500 Epoch of periastron passage (year)
e: 0.0 Eccentricity
ω: 0.0 Longitude of periastron (degrees)
Start-Year: 1753.0 Year
End-Year: 2297.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A1939
Position: 041841.83+044502.4 Epoch-2000 right ascension and declination
WDS-ID: 04187+0445 WDS designation
Discoverer Code: A1939 Discover designation and components
ADS number: 3116 Aitken Double Star catalog
HD number: 27283 HD catalog number
Hipparcos number: 20111 Hipparcos catalog number
V1: 9.56 Magnitude of the primary
V2: 9.60 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2003 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: Zir2012b Reference

Double Star Orbit for A1939



WDS 6th Orbit including measures of A1939

-- 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 A1939
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.628   308.38
--------------------------
1753.00    0.633   127.17
1754.00    0.629   127.97
1755.00    0.626   128.79
1756.00    0.623   129.61
1757.00    0.619   130.44
1758.00    0.616   131.28
1759.00    0.613   132.13
1760.00    0.610   132.99
1761.00    0.607   133.86
1762.00    0.604   134.73
1763.00    0.601   135.62
1764.00    0.598   136.51
1765.00    0.596   137.41
1766.00    0.593   138.32
1767.00    0.590   139.24
1768.00    0.588   140.16
1769.00    0.585   141.09
1770.00    0.583   142.04
1771.00    0.580   142.98
1772.00    0.578   143.94
1773.00    0.576   144.90
1774.00    0.574   145.87
1775.00    0.572   146.85
1776.00    0.570   147.84
1777.00    0.568   148.83
1778.00    0.567   149.82
1779.00    0.565   150.82
1780.00    0.564   151.83
1781.00    0.562   152.85
1782.00    0.561   153.86
1783.00    0.560   154.89
1784.00    0.559   155.91
1785.00    0.558   156.94
1786.00    0.557   157.98
1787.00    0.556   159.01
1788.00    0.555   160.05
1789.00    0.555   161.09
1790.00    0.554   162.14
1791.00    0.554   163.18
1792.00    0.554   164.23
1793.00    0.554   165.28
1794.00    0.554   166.32
1795.00    0.554   167.37
1796.00    0.554   168.42
1797.00    0.554   169.46
1798.00    0.555   170.51
1799.00    0.555   171.55
1800.00    0.556   172.59
1801.00    0.557   173.62
1802.00    0.558   174.66
1803.00    0.559   175.69
1804.00    0.560   176.71
1805.00    0.561   177.74
1806.00    0.562   178.75
1807.00    0.564   179.77
1808.00    0.565   180.78
1809.00    0.567   181.78
1810.00    0.568   182.77
1811.00    0.570   183.76
1812.00    0.572   184.75
1813.00    0.574   185.73
1814.00    0.576   186.70
1815.00    0.578   187.66
1816.00    0.580   188.62
1817.00    0.583   189.56
1818.00    0.585   190.51
1819.00    0.588   191.44
1820.00    0.590   192.36
1821.00    0.593   193.28
1822.00    0.596   194.19
1823.00    0.598   195.09
1824.00    0.601   195.98
1825.00    0.604   196.87
1826.00    0.607   197.74
1827.00    0.610   198.61
1828.00    0.613   199.47
1829.00    0.616   200.32
1830.00    0.619   201.16
1831.00    0.623   201.99
1832.00    0.626   202.81
1833.00    0.629   203.63
1834.00    0.633   204.43
1835.00    0.636   205.23
1836.00    0.639   206.02
1837.00    0.643   206.80
1838.00    0.646   207.57
1839.00    0.650   208.34
1840.00    0.654   209.09
1841.00    0.657   209.84
1842.00    0.661   210.58
1843.00    0.664   211.31
1844.00    0.668   212.03
1845.00    0.672   212.75
1846.00    0.675   213.46
1847.00    0.679   214.16
1848.00    0.683   214.85
1849.00    0.687   215.53
1850.00    0.690   216.21
1851.00    0.694   216.88
1852.00    0.698   217.54
1853.00    0.701   218.20
1854.00    0.705   218.85
1855.00    0.709   219.49
1856.00    0.713   220.13
1857.00    0.716   220.75
1858.00    0.720   221.38
1859.00    0.724   221.99
1860.00    0.727   222.60
1861.00    0.731   223.21
1862.00    0.735   223.80
1863.00    0.738   224.40
1864.00    0.742   224.98
1865.00    0.745   225.56
1866.00    0.749   226.14
1867.00    0.752   226.71
1868.00    0.756   227.27
1869.00    0.759   227.83
1870.00    0.763   228.38
1871.00    0.766   228.93
1872.00    0.770   229.48
1873.00    0.773   230.02
1874.00    0.776   230.55
1875.00    0.780   231.08
1876.00    0.783   231.61
1877.00    0.786   232.13
1878.00    0.789   232.65
1879.00    0.792   233.16
1880.00    0.795   233.67
1881.00    0.798   234.18
1882.00    0.801   234.68
1883.00    0.804   235.18
1884.00    0.807   235.67
1885.00    0.810   236.16
1886.00    0.813   236.65
1887.00    0.815   237.13
1888.00    0.818   237.61
1889.00    0.821   238.09
1890.00    0.823   238.57
1891.00    0.826   239.04
1892.00    0.828   239.51
1893.00    0.831   239.98
1894.00    0.833   240.44
1895.00    0.835   240.90
1896.00    0.838   241.36
1897.00    0.840   241.81
1898.00    0.842   242.27
1899.00    0.844   242.72
1900.00    0.846   243.17
1901.00    0.848   243.62
1902.00    0.850   244.06
1903.00    0.852   244.51
1904.00    0.854   244.95
1905.00    0.855   245.39
1906.00    0.857   245.82
1907.00    0.858   246.26
1908.00    0.860   246.70
1909.00    0.861   247.13
1910.00    0.863   247.56
1911.00    0.864   247.99
1912.00    0.865   248.42
1913.00    0.867   248.85
1914.00    0.868   249.28
1915.00    0.869   249.70
1916.00    0.870   250.13
1917.00    0.871   250.55
1918.00    0.871   250.97
1919.00    0.872   251.40
1920.00    0.873   251.82
1921.00    0.873   252.24
1922.00    0.874   252.66
1923.00    0.875   253.08
1924.00    0.875   253.50
1925.00    0.875   253.92
1926.00    0.876   254.34
1927.00    0.876   254.75
1928.00    0.876   255.17
1929.00    0.876   255.59
1930.00    0.876   256.01
1931.00    0.876   256.43
1932.00    0.876   256.85
1933.00    0.876   257.26
1934.00    0.875   257.68
1935.00    0.875   258.10
1936.00    0.875   258.52
1937.00    0.874   258.94
1938.00    0.873   259.36
1939.00    0.873   259.78
1940.00    0.872   260.20
1941.00    0.871   260.63
1942.00    0.871   261.05
1943.00    0.870   261.47
1944.00    0.869   261.90
1945.00    0.868   262.32
1946.00    0.867   262.75
1947.00    0.865   263.18
1948.00    0.864   263.61
1949.00    0.863   264.04
1950.00    0.861   264.47
1951.00    0.860   264.90
1952.00    0.858   265.34
1953.00    0.857   265.78
1954.00    0.855   266.21
1955.00    0.854   266.65
1956.00    0.852   267.09
1957.00    0.850   267.54
1958.00    0.848   267.98
1959.00    0.846   268.43
1960.00    0.844   268.88
1961.00    0.842   269.33
1962.00    0.840   269.79
1963.00    0.838   270.24
1964.00    0.835   270.70
1965.00    0.833   271.16
1966.00    0.831   271.62
1967.00    0.828   272.09
1968.00    0.826   272.56
1969.00    0.823   273.03
1970.00    0.821   273.51
1971.00    0.818   273.99
1972.00    0.815   274.47
1973.00    0.813   274.95
1974.00    0.810   275.44
1975.00    0.807   275.93
1976.00    0.804   276.42
1977.00    0.801   276.92
1978.00    0.798   277.42
1979.00    0.795   277.93
1980.00    0.792   278.44
1981.00    0.789   278.95
1982.00    0.786   279.47
1983.00    0.783   279.99
1984.00    0.780   280.52
1985.00    0.776   281.05
1986.00    0.773   281.58
1987.00    0.770   282.12
1988.00    0.766   282.67
1989.00    0.763   283.22
1990.00    0.759   283.77
1991.00    0.756   284.33
1992.00    0.752   284.89
1993.00    0.749   285.46
1994.00    0.745   286.04
1995.00    0.742   286.62
1996.00    0.738   287.20
1997.00    0.735   287.80
1998.00    0.731   288.39
1999.00    0.727   289.00
2000.00    0.724   289.61
2001.00    0.720   290.22
2002.00    0.716   290.85
2003.00    0.713   291.47
2004.00    0.709   292.11
2005.00    0.705   292.75
2006.00    0.701   293.40
2007.00    0.698   294.06
2008.00    0.694   294.72
2009.00    0.690   295.39
2010.00    0.687   296.07
2011.00    0.683   296.75
2012.00    0.679   297.44
2013.00    0.675   298.14
2014.00    0.672   298.85
2015.00    0.668   299.57
2016.00    0.664   300.29
2017.00    0.661   301.02
2018.00    0.657   301.76
2019.00    0.654   302.51
2020.00    0.650   303.26
2021.00    0.646   304.03
2022.00    0.643   304.80
2023.00    0.639   305.58
2024.00    0.636   306.37
2025.00    0.633   307.17
2026.00    0.629   307.97
2027.00    0.626   308.79
2028.00    0.623   309.61
2029.00    0.619   310.44
2030.00    0.616   311.28
2031.00    0.613   312.13
2032.00    0.610   312.99
2033.00    0.607   313.86
2034.00    0.604   314.73
2035.00    0.601   315.62
2036.00    0.598   316.51
2037.00    0.596   317.41
2038.00    0.593   318.32
2039.00    0.590   319.24
2040.00    0.588   320.16
2041.00    0.585   321.09
2042.00    0.583   322.04
2043.00    0.580   322.98
2044.00    0.578   323.94
2045.00    0.576   324.90
2046.00    0.574   325.87
2047.00    0.572   326.85
2048.00    0.570   327.84
2049.00    0.568   328.83
2050.00    0.567   329.82
2051.00    0.565   330.82
2052.00    0.564   331.83
2053.00    0.562   332.85
2054.00    0.561   333.86
2055.00    0.560   334.89
2056.00    0.559   335.91
2057.00    0.558   336.94
2058.00    0.557   337.98
2059.00    0.556   339.01
2060.00    0.555   340.05
2061.00    0.555   341.09
2062.00    0.554   342.14
2063.00    0.554   343.18
2064.00    0.554   344.23
2065.00    0.554   345.28
2066.00    0.554   346.32
2067.00    0.554   347.37
2068.00    0.554   348.42
2069.00    0.554   349.46
2070.00    0.555   350.51
2071.00    0.555   351.55
2072.00    0.556   352.59
2073.00    0.557   353.62
2074.00    0.558   354.66
2075.00    0.559   355.69
2076.00    0.560   356.71
2077.00    0.561   357.74
2078.00    0.562   358.75
2079.00    0.564   359.77
2080.00    0.565     0.78
2081.00    0.567     1.78
2082.00    0.568     2.77
2083.00    0.570     3.76
2084.00    0.572     4.75
2085.00    0.574     5.73
2086.00    0.576     6.70
2087.00    0.578     7.66
2088.00    0.580     8.62
2089.00    0.583     9.56
2090.00    0.585    10.51
2091.00    0.588    11.44
2092.00    0.590    12.36
2093.00    0.593    13.28
2094.00    0.596    14.19
2095.00    0.598    15.09
2096.00    0.601    15.98
2097.00    0.604    16.87
2098.00    0.607    17.74
2099.00    0.610    18.61
2100.00    0.613    19.47
2101.00    0.616    20.32
2102.00    0.619    21.16
2103.00    0.623    21.99
2104.00    0.626    22.81
2105.00    0.629    23.63
2106.00    0.633    24.43
2107.00    0.636    25.23
2108.00    0.639    26.02
2109.00    0.643    26.80
2110.00    0.646    27.57
2111.00    0.650    28.34
2112.00    0.654    29.09
2113.00    0.657    29.84
2114.00    0.661    30.58
2115.00    0.664    31.31
2116.00    0.668    32.03
2117.00    0.672    32.75
2118.00    0.675    33.46
2119.00    0.679    34.16
2120.00    0.683    34.85
2121.00    0.687    35.53
2122.00    0.690    36.21
2123.00    0.694    36.88
2124.00    0.698    37.54
2125.00    0.701    38.20
2126.00    0.705    38.85
2127.00    0.709    39.49
2128.00    0.713    40.13
2129.00    0.716    40.75
2130.00    0.720    41.38
2131.00    0.724    41.99
2132.00    0.727    42.60
2133.00    0.731    43.21
2134.00    0.735    43.80
2135.00    0.738    44.40
2136.00    0.742    44.98
2137.00    0.745    45.56
2138.00    0.749    46.14
2139.00    0.752    46.71
2140.00    0.756    47.27
2141.00    0.759    47.83
2142.00    0.763    48.38
2143.00    0.766    48.93
2144.00    0.770    49.48
2145.00    0.773    50.02
2146.00    0.776    50.55
2147.00    0.780    51.08
2148.00    0.783    51.61
2149.00    0.786    52.13
2150.00    0.789    52.65
2151.00    0.792    53.16
2152.00    0.795    53.67
2153.00    0.798    54.18
2154.00    0.801    54.68
2155.00    0.804    55.18
2156.00    0.807    55.67
2157.00    0.810    56.16
2158.00    0.813    56.65
2159.00    0.815    57.13
2160.00    0.818    57.61
2161.00    0.821    58.09
2162.00    0.823    58.57
2163.00    0.826    59.04
2164.00    0.828    59.51
2165.00    0.831    59.98
2166.00    0.833    60.44
2167.00    0.835    60.90
2168.00    0.838    61.36
2169.00    0.840    61.81
2170.00    0.842    62.27
2171.00    0.844    62.72
2172.00    0.846    63.17
2173.00    0.848    63.62
2174.00    0.850    64.06
2175.00    0.852    64.51
2176.00    0.854    64.95
2177.00    0.855    65.39
2178.00    0.857    65.82
2179.00    0.858    66.26
2180.00    0.860    66.70
2181.00    0.861    67.13
2182.00    0.863    67.56
2183.00    0.864    67.99
2184.00    0.865    68.42
2185.00    0.867    68.85
2186.00    0.868    69.28
2187.00    0.869    69.70
2188.00    0.870    70.13
2189.00    0.871    70.55
2190.00    0.871    70.97
2191.00    0.872    71.40
2192.00    0.873    71.82
2193.00    0.873    72.24
2194.00    0.874    72.66
2195.00    0.875    73.08
2196.00    0.875    73.50
2197.00    0.875    73.92
2198.00    0.876    74.34
2199.00    0.876    74.75
2200.00    0.876    75.17
2201.00    0.876    75.59
2202.00    0.876    76.01
2203.00    0.876    76.43
2204.00    0.876    76.85
2205.00    0.876    77.26
2206.00    0.875    77.68
2207.00    0.875    78.10
2208.00    0.875    78.52
2209.00    0.874    78.94
2210.00    0.873    79.36
2211.00    0.873    79.78
2212.00    0.872    80.20
2213.00    0.871    80.63
2214.00    0.871    81.05
2215.00    0.870    81.47
2216.00    0.869    81.90
2217.00    0.868    82.32
2218.00    0.867    82.75
2219.00    0.865    83.18
2220.00    0.864    83.61
2221.00    0.863    84.04
2222.00    0.861    84.47
2223.00    0.860    84.90
2224.00    0.858    85.34
2225.00    0.857    85.78
2226.00    0.855    86.21
2227.00    0.854    86.65
2228.00    0.852    87.09
2229.00    0.850    87.54
2230.00    0.848    87.98
2231.00    0.846    88.43
2232.00    0.844    88.88
2233.00    0.842    89.33
2234.00    0.840    89.79
2235.00    0.838    90.24
2236.00    0.835    90.70
2237.00    0.833    91.16
2238.00    0.831    91.62
2239.00    0.828    92.09
2240.00    0.826    92.56
2241.00    0.823    93.03
2242.00    0.821    93.51
2243.00    0.818    93.99
2244.00    0.815    94.47
2245.00    0.813    94.95
2246.00    0.810    95.44
2247.00    0.807    95.93
2248.00    0.804    96.42
2249.00    0.801    96.92
2250.00    0.798    97.42
2251.00    0.795    97.93
2252.00    0.792    98.44
2253.00    0.789    98.95
2254.00    0.786    99.47
2255.00    0.783    99.99
2256.00    0.780   100.52
2257.00    0.776   101.05
2258.00    0.773   101.58
2259.00    0.770   102.12
2260.00    0.766   102.67
2261.00    0.763   103.22
2262.00    0.759   103.77
2263.00    0.756   104.33
2264.00    0.752   104.89
2265.00    0.749   105.46
2266.00    0.745   106.04
2267.00    0.742   106.62
2268.00    0.738   107.20
2269.00    0.735   107.80
2270.00    0.731   108.39
2271.00    0.727   109.00
2272.00    0.724   109.61
2273.00    0.720   110.22
2274.00    0.716   110.85
2275.00    0.713   111.47
2276.00    0.709   112.11
2277.00    0.705   112.75
2278.00    0.701   113.40
2279.00    0.698   114.06
2280.00    0.694   114.72
2281.00    0.690   115.39
2282.00    0.687   116.07
2283.00    0.683   116.75
2284.00    0.679   117.44
2285.00    0.675   118.14
2286.00    0.672   118.85
2287.00    0.668   119.57
2288.00    0.664   120.29
2289.00    0.661   121.02
2290.00    0.657   121.76
2291.00    0.654   122.51
2292.00    0.650   123.26
2293.00    0.646   124.03
2294.00    0.643   124.80
2295.00    0.639   125.58
2296.00    0.636   126.37






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 15:20:50



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