Double Star Calculator - Orbit

Orbital Elements for I439
WDS: I439 WDS ID/Discoverer
P: 350.000 Orbital period (years)
a: 0.709 Semi-major axis (arcseconds)
i: 47.8 Inclination (degrees)
Ω: 122.2 Longitude of ascending node (degrees)
T: 2020.574 Epoch of periastron passage (year)
e: 0.958 Eccentricity
ω: 141.1 Longitude of periastron (degrees)
Start-Year: 1850.0 Year
End-Year: 2200.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I439
Position: 003447.47-585307.6 Epoch-2000 right ascension and declination
WDS-ID: 00348-5853 WDS designation
Discoverer Code: I439 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 3207 HD catalog number
Hipparcos number: 2726 Hipparcos catalog number
V1: 9.96 Magnitude of the primary
V2: 9.86 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2023 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2023e Reference

Double Star Orbit for I439



WDS 6th Orbit including measures of I439

-- 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 I439
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.156    49.61
--------------------------
1850.00    1.231    94.03
1851.00    1.231    94.10
1852.00    1.231    94.16
1853.00    1.232    94.23
1854.00    1.232    94.30
1855.00    1.232    94.36
1856.00    1.232    94.43
1857.00    1.232    94.49
1858.00    1.232    94.56
1859.00    1.232    94.62
1860.00    1.232    94.69
1861.00    1.231    94.76
1862.00    1.231    94.82
1863.00    1.231    94.89
1864.00    1.231    94.95
1865.00    1.230    95.02
1866.00    1.230    95.08
1867.00    1.229    95.15
1868.00    1.229    95.22
1869.00    1.228    95.28
1870.00    1.227    95.35
1871.00    1.227    95.41
1872.00    1.226    95.48
1873.00    1.225    95.55
1874.00    1.224    95.61
1875.00    1.223    95.68
1876.00    1.222    95.75
1877.00    1.221    95.81
1878.00    1.220    95.88
1879.00    1.219    95.95
1880.00    1.218    96.01
1881.00    1.216    96.08
1882.00    1.215    96.15
1883.00    1.214    96.22
1884.00    1.212    96.28
1885.00    1.211    96.35
1886.00    1.209    96.42
1887.00    1.208    96.49
1888.00    1.206    96.56
1889.00    1.204    96.63
1890.00    1.202    96.69
1891.00    1.201    96.76
1892.00    1.199    96.83
1893.00    1.197    96.90
1894.00    1.195    96.97
1895.00    1.193    97.04
1896.00    1.191    97.11
1897.00    1.188    97.18
1898.00    1.186    97.25
1899.00    1.184    97.32
1900.00    1.182    97.39
1901.00    1.179    97.47
1902.00    1.177    97.54
1903.00    1.174    97.61
1904.00    1.172    97.68
1905.00    1.169    97.75
1906.00    1.166    97.83
1907.00    1.163    97.90
1908.00    1.161    97.98
1909.00    1.158    98.05
1910.00    1.155    98.12
1911.00    1.152    98.20
1912.00    1.149    98.27
1913.00    1.145    98.35
1914.00    1.142    98.43
1915.00    1.139    98.50
1916.00    1.136    98.58
1917.00    1.132    98.66
1918.00    1.129    98.73
1919.00    1.125    98.81
1920.00    1.122    98.89
1921.00    1.118    98.97
1922.00    1.114    99.05
1923.00    1.110    99.13
1924.00    1.106    99.21
1925.00    1.102    99.29
1926.00    1.098    99.38
1927.00    1.094    99.46
1928.00    1.090    99.54
1929.00    1.086    99.63
1930.00    1.082    99.71
1931.00    1.077    99.80
1932.00    1.073    99.88
1933.00    1.068    99.97
1934.00    1.063   100.06
1935.00    1.059   100.15
1936.00    1.054   100.24
1937.00    1.049   100.33
1938.00    1.044   100.42
1939.00    1.039   100.51
1940.00    1.034   100.60
1941.00    1.029   100.70
1942.00    1.024   100.79
1943.00    1.018   100.89
1944.00    1.013   100.98
1945.00    1.007   101.08
1946.00    1.002   101.18
1947.00    0.996   101.28
1948.00    0.990   101.38
1949.00    0.984   101.48
1950.00    0.978   101.58
1951.00    0.972   101.69
1952.00    0.966   101.80
1953.00    0.960   101.90
1954.00    0.953   102.01
1955.00    0.947   102.12
1956.00    0.940   102.23
1957.00    0.934   102.35
1958.00    0.927   102.46
1959.00    0.920   102.58
1960.00    0.913   102.70
1961.00    0.906   102.82
1962.00    0.899   102.94
1963.00    0.891   103.06
1964.00    0.884   103.19
1965.00    0.877   103.32
1966.00    0.869   103.45
1967.00    0.861   103.58
1968.00    0.853   103.72
1969.00    0.845   103.86
1970.00    0.837   104.00
1971.00    0.829   104.14
1972.00    0.820   104.29
1973.00    0.812   104.44
1974.00    0.803   104.59
1975.00    0.794   104.75
1976.00    0.785   104.91
1977.00    0.776   105.07
1978.00    0.766   105.24
1979.00    0.757   105.41
1980.00    0.747   105.59
1981.00    0.737   105.77
1982.00    0.727   105.95
1983.00    0.717   106.14
1984.00    0.707   106.34
1985.00    0.696   106.54
1986.00    0.685   106.75
1987.00    0.674   106.97
1988.00    0.663   107.19
1989.00    0.652   107.42
1990.00    0.640   107.66
1991.00    0.628   107.91
1992.00    0.616   108.16
1993.00    0.604   108.43
1994.00    0.591   108.71
1995.00    0.578   109.00
1996.00    0.565   109.31
1997.00    0.551   109.63
1998.00    0.537   109.96
1999.00    0.523   110.32
2000.00    0.508   110.69
2001.00    0.493   111.09
2002.00    0.478   111.51
2003.00    0.462   111.96
2004.00    0.446   112.44
2005.00    0.429   112.97
2006.00    0.412   113.53
2007.00    0.394   114.14
2008.00    0.375   114.82
2009.00    0.355   115.57
2010.00    0.335   116.40
2011.00    0.314   117.35
2012.00    0.292   118.44
2013.00    0.268   119.71
2014.00    0.243   121.23
2015.00    0.217   123.12
2016.00    0.188   125.56
2017.00    0.156   128.94
2018.00    0.121   134.18
2019.00    0.080   144.40
2020.00    0.032   183.21
2021.00    0.038   315.94
2022.00    0.059     0.86
2023.00    0.080    22.10
2024.00    0.103    34.15
2025.00    0.125    41.94
2026.00    0.146    47.42
2027.00    0.166    51.54
2028.00    0.186    54.77
2029.00    0.205    57.39
2030.00    0.223    59.57
2031.00    0.241    61.43
2032.00    0.258    63.03
2033.00    0.275    64.44
2034.00    0.291    65.69
2035.00    0.307    66.80
2036.00    0.322    67.81
2037.00    0.337    68.72
2038.00    0.352    69.56
2039.00    0.367    70.33
2040.00    0.381    71.05
2041.00    0.395    71.71
2042.00    0.408    72.33
2043.00    0.422    72.90
2044.00    0.435    73.45
2045.00    0.447    73.96
2046.00    0.460    74.44
2047.00    0.472    74.90
2048.00    0.485    75.34
2049.00    0.497    75.75
2050.00    0.508    76.14
2051.00    0.520    76.52
2052.00    0.531    76.88
2053.00    0.543    77.23
2054.00    0.554    77.56
2055.00    0.564    77.88
2056.00    0.575    78.19
2057.00    0.586    78.48
2058.00    0.596    78.77
2059.00    0.606    79.04
2060.00    0.616    79.31
2061.00    0.626    79.57
2062.00    0.636    79.82
2063.00    0.646    80.06
2064.00    0.655    80.29
2065.00    0.665    80.52
2066.00    0.674    80.74
2067.00    0.683    80.96
2068.00    0.692    81.17
2069.00    0.701    81.38
2070.00    0.710    81.58
2071.00    0.719    81.77
2072.00    0.727    81.96
2073.00    0.736    82.15
2074.00    0.744    82.33
2075.00    0.753    82.51
2076.00    0.761    82.68
2077.00    0.769    82.85
2078.00    0.777    83.02
2079.00    0.785    83.18
2080.00    0.792    83.34
2081.00    0.800    83.50
2082.00    0.808    83.65
2083.00    0.815    83.80
2084.00    0.823    83.95
2085.00    0.830    84.10
2086.00    0.837    84.24
2087.00    0.844    84.38
2088.00    0.851    84.52
2089.00    0.858    84.66
2090.00    0.865    84.79
2091.00    0.872    84.92
2092.00    0.879    85.05
2093.00    0.885    85.18
2094.00    0.892    85.31
2095.00    0.898    85.43
2096.00    0.905    85.56
2097.00    0.911    85.68
2098.00    0.917    85.80
2099.00    0.923    85.91
2100.00    0.929    86.03
2101.00    0.935    86.14
2102.00    0.941    86.26
2103.00    0.947    86.37
2104.00    0.953    86.48
2105.00    0.959    86.59
2106.00    0.964    86.70
2107.00    0.970    86.80
2108.00    0.975    86.91
2109.00    0.981    87.01
2110.00    0.986    87.12
2111.00    0.991    87.22
2112.00    0.997    87.32
2113.00    1.002    87.42
2114.00    1.007    87.52
2115.00    1.012    87.61
2116.00    1.017    87.71
2117.00    1.022    87.81
2118.00    1.027    87.90
2119.00    1.031    88.00
2120.00    1.036    88.09
2121.00    1.041    88.18
2122.00    1.045    88.27
2123.00    1.050    88.36
2124.00    1.054    88.45
2125.00    1.059    88.54
2126.00    1.063    88.63
2127.00    1.067    88.72
2128.00    1.072    88.81
2129.00    1.076    88.89
2130.00    1.080    88.98
2131.00    1.084    89.06
2132.00    1.088    89.15
2133.00    1.092    89.23
2134.00    1.096    89.31
2135.00    1.099    89.40
2136.00    1.103    89.48
2137.00    1.107    89.56
2138.00    1.111    89.64
2139.00    1.114    89.72
2140.00    1.118    89.80
2141.00    1.121    89.88
2142.00    1.124    89.96
2143.00    1.128    90.04
2144.00    1.131    90.12
2145.00    1.134    90.20
2146.00    1.138    90.27
2147.00    1.141    90.35
2148.00    1.144    90.43
2149.00    1.147    90.50
2150.00    1.150    90.58
2151.00    1.153    90.65
2152.00    1.155    90.73
2153.00    1.158    90.80
2154.00    1.161    90.88
2155.00    1.164    90.95
2156.00    1.166    91.02
2157.00    1.169    91.10
2158.00    1.171    91.17
2159.00    1.174    91.24
2160.00    1.176    91.31
2161.00    1.179    91.38
2162.00    1.181    91.46
2163.00    1.183    91.53
2164.00    1.186    91.60
2165.00    1.188    91.67
2166.00    1.190    91.74
2167.00    1.192    91.81
2168.00    1.194    91.88
2169.00    1.196    91.95
2170.00    1.198    92.02
2171.00    1.200    92.09
2172.00    1.201    92.16
2173.00    1.203    92.23
2174.00    1.205    92.30
2175.00    1.206    92.36
2176.00    1.208    92.43
2177.00    1.210    92.50
2178.00    1.211    92.57
2179.00    1.212    92.64
2180.00    1.214    92.70
2181.00    1.215    92.77
2182.00    1.216    92.84
2183.00    1.218    92.91
2184.00    1.219    92.97
2185.00    1.220    93.04
2186.00    1.221    93.11
2187.00    1.222    93.17
2188.00    1.223    93.24
2189.00    1.224    93.31
2190.00    1.225    93.37
2191.00    1.226    93.44
2192.00    1.227    93.51
2193.00    1.227    93.57
2194.00    1.228    93.64
2195.00    1.229    93.70
2196.00    1.229    93.77
2197.00    1.230    93.84
2198.00    1.230    93.90
2199.00    1.230    93.97






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 14:41:06



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