Double Star Calculator - Orbit

Orbital Elements for A1205
WDS: A1205 WDS ID/Discoverer
P: 508.450 Orbital period (years)
a: 1.8606 Semi-major axis (arcseconds)
i: 98.86 Inclination (degrees)
Ω: 285.47 Longitude of ascending node (degrees)
T: 1970.746 Epoch of periastron passage (year)
e: 0.9067 Eccentricity
ω: 72.88 Longitude of periastron (degrees)
Start-Year: 1770.775 Year
End-Year: 2279.225 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A1205
Position: 201813.44+291215.0 Epoch-2000 right ascension and declination
WDS-ID: 20182+2912 WDS designation
Discoverer Code: A1205 Discover designation and components
ADS number: 13665 Aitken Double Star catalog
HD number: 334100 HD catalog number
Hipparcos number: 100079 Hipparcos catalog number
V1: 9.17 Magnitude of the primary
V2: 10.08 Magnitude of the secondary
Equinox: Equinox
Date: 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: FSU2025 Reference

Double Star Orbit for A1205



WDS 6th Orbit including measures of A1205

-- 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 A1205
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.279    95.59
--------------------------
1770.78    0.911    70.84
1771.78    0.906    70.65
1772.78    0.900    70.45
1773.78    0.895    70.26
1774.78    0.890    70.06
1775.78    0.885    69.85
1776.78    0.880    69.65
1777.78    0.874    69.44
1778.78    0.869    69.23
1779.78    0.864    69.02
1780.78    0.859    68.81
1781.78    0.853    68.59
1782.78    0.848    68.37
1783.78    0.843    68.15
1784.78    0.838    67.92
1785.78    0.832    67.69
1786.78    0.827    67.46
1787.78    0.822    67.23
1788.78    0.816    66.99
1789.78    0.811    66.75
1790.78    0.806    66.51
1791.78    0.800    66.26
1792.78    0.795    66.01
1793.78    0.790    65.75
1794.78    0.784    65.50
1795.78    0.779    65.24
1796.78    0.774    64.97
1797.78    0.768    64.70
1798.78    0.763    64.43
1799.78    0.758    64.16
1800.78    0.752    63.88
1801.78    0.747    63.59
1802.78    0.741    63.31
1803.78    0.736    63.01
1804.78    0.731    62.72
1805.78    0.725    62.42
1806.78    0.720    62.11
1807.78    0.714    61.80
1808.78    0.709    61.49
1809.78    0.704    61.17
1810.78    0.698    60.85
1811.78    0.693    60.52
1812.78    0.688    60.18
1813.78    0.682    59.84
1814.78    0.677    59.50
1815.78    0.671    59.15
1816.78    0.666    58.79
1817.78    0.661    58.43
1818.78    0.655    58.06
1819.78    0.650    57.69
1820.78    0.645    57.31
1821.78    0.639    56.92
1822.78    0.634    56.53
1823.78    0.629    56.13
1824.78    0.624    55.72
1825.78    0.618    55.31
1826.78    0.613    54.89
1827.78    0.608    54.46
1828.78    0.602    54.03
1829.78    0.597    53.59
1830.78    0.592    53.14
1831.78    0.587    52.68
1832.78    0.582    52.21
1833.78    0.576    51.74
1834.78    0.571    51.25
1835.78    0.566    50.76
1836.78    0.561    50.26
1837.78    0.556    49.75
1838.78    0.551    49.23
1839.78    0.546    48.70
1840.78    0.541    48.16
1841.78    0.536    47.61
1842.78    0.531    47.05
1843.78    0.526    46.48
1844.78    0.521    45.90
1845.78    0.517    45.31
1846.78    0.512    44.71
1847.78    0.507    44.10
1848.78    0.502    43.47
1849.78    0.498    42.83
1850.78    0.493    42.18
1851.78    0.488    41.52
1852.78    0.484    40.85
1853.78    0.479    40.16
1854.78    0.475    39.46
1855.78    0.470    38.75
1856.78    0.466    38.02
1857.78    0.462    37.28
1858.78    0.458    36.53
1859.78    0.453    35.76
1860.78    0.449    34.98
1861.78    0.445    34.18
1862.78    0.441    33.37
1863.78    0.437    32.55
1864.78    0.433    31.71
1865.78    0.430    30.85
1866.78    0.426    29.98
1867.78    0.422    29.10
1868.78    0.419    28.19
1869.78    0.415    27.28
1870.78    0.412    26.35
1871.78    0.409    25.40
1872.78    0.405    24.44
1873.78    0.402    23.47
1874.78    0.399    22.48
1875.78    0.396    21.47
1876.78    0.394    20.45
1877.78    0.391    19.42
1878.78    0.388    18.37
1879.78    0.386    17.30
1880.78    0.384    16.23
1881.78    0.381    15.14
1882.78    0.379    14.04
1883.78    0.377    12.92
1884.78    0.375    11.80
1885.78    0.373    10.66
1886.78    0.372     9.51
1887.78    0.370     8.36
1888.78    0.369     7.19
1889.78    0.367     6.02
1890.78    0.366     4.83
1891.78    0.365     3.64
1892.78    0.364     2.44
1893.78    0.364     1.24
1894.78    0.363     0.04
1895.78    0.362   358.83
1896.78    0.362   357.61
1897.78    0.362   356.40
1898.78    0.362   355.18
1899.78    0.362   353.96
1900.78    0.362   352.74
1901.78    0.362   351.53
1902.78    0.362   350.31
1903.78    0.363   349.10
1904.78    0.364   347.90
1905.78    0.364   346.70
1906.78    0.365   345.50
1907.78    0.366   344.31
1908.78    0.367   343.13
1909.78    0.369   341.95
1910.78    0.370   340.78
1911.78    0.371   339.62
1912.78    0.373   338.47
1913.78    0.375   337.33
1914.78    0.376   336.20
1915.78    0.378   335.08
1916.78    0.380   333.98
1917.78    0.382   332.88
1918.78    0.384   331.79
1919.78    0.386   330.72
1920.78    0.389   329.66
1921.78    0.391   328.61
1922.78    0.393   327.58
1923.78    0.396   326.55
1924.78    0.398   325.54
1925.78    0.401   324.54
1926.78    0.403   323.56
1927.78    0.406   322.58
1928.78    0.408   321.62
1929.78    0.411   320.67
1930.78    0.413   319.73
1931.78    0.416   318.81
1932.78    0.419   317.89
1933.78    0.421   316.99
1934.78    0.424   316.10
1935.78    0.426   315.21
1936.78    0.429   314.34
1937.78    0.431   313.48
1938.78    0.433   312.63
1939.78    0.436   311.78
1940.78    0.438   310.95
1941.78    0.440   310.12
1942.78    0.442   309.30
1943.78    0.444   308.49
1944.78    0.445   307.68
1945.78    0.447   306.88
1946.78    0.448   306.09
1947.78    0.449   305.30
1948.78    0.449   304.51
1949.78    0.450   303.72
1950.78    0.450   302.93
1951.78    0.450   302.15
1952.78    0.449   301.36
1953.78    0.448   300.56
1954.78    0.446   299.77
1955.78    0.443   298.96
1956.78    0.440   298.14
1957.78    0.436   297.31
1958.78    0.430   296.46
1959.78    0.424   295.59
1960.78    0.416   294.69
1961.78    0.406   293.74
1962.78    0.394   292.75
1963.78    0.379   291.68
1964.78    0.360   290.52
1965.78    0.337   289.21
1966.78    0.306   287.67
1967.78    0.267   285.73
1968.78    0.213   282.96
1969.78    0.142   277.79
1970.78    0.055   257.42
1971.78    0.060   133.28
1972.78    0.149   115.49
1973.78    0.230   110.91
1974.78    0.300   108.62
1975.78    0.361   107.16
1976.78    0.415   106.10
1977.78    0.464   105.27
1978.78    0.508   104.60
1979.78    0.548   104.02
1980.78    0.585   103.53
1981.78    0.619   103.09
1982.78    0.651   102.69
1983.78    0.682   102.34
1984.78    0.710   102.01
1985.78    0.737   101.70
1986.78    0.762   101.42
1987.78    0.786   101.15
1988.78    0.809   100.90
1989.78    0.831   100.67
1990.78    0.852   100.44
1991.78    0.873   100.23
1992.78    0.892   100.02
1993.78    0.910    99.83
1994.78    0.928    99.64
1995.78    0.946    99.46
1996.78    0.962    99.28
1997.78    0.978    99.11
1998.78    0.993    98.95
1999.78    1.008    98.79
2000.78    1.023    98.64
2001.78    1.037    98.49
2002.78    1.050    98.34
2003.78    1.063    98.20
2004.78    1.076    98.06
2005.78    1.088    97.92
2006.78    1.100    97.79
2007.78    1.112    97.66
2008.78    1.123    97.53
2009.78    1.134    97.41
2010.78    1.145    97.28
2011.78    1.155    97.16
2012.78    1.165    97.05
2013.78    1.175    96.93
2014.78    1.184    96.81
2015.78    1.194    96.70
2016.78    1.203    96.59
2017.78    1.211    96.48
2018.78    1.220    96.37
2019.78    1.228    96.27
2020.78    1.236    96.16
2021.78    1.244    96.06
2022.78    1.252    95.96
2023.78    1.259    95.86
2024.78    1.267    95.76
2025.78    1.274    95.66
2026.78    1.281    95.56
2027.78    1.287    95.46
2028.78    1.294    95.37
2029.78    1.300    95.27
2030.78    1.307    95.18
2031.78    1.313    95.09
2032.78    1.319    95.00
2033.78    1.324    94.90
2034.78    1.330    94.81
2035.78    1.335    94.72
2036.78    1.341    94.63
2037.78    1.346    94.55
2038.78    1.351    94.46
2039.78    1.356    94.37
2040.78    1.361    94.29
2041.78    1.365    94.20
2042.78    1.370    94.12
2043.78    1.374    94.03
2044.78    1.379    93.95
2045.78    1.383    93.86
2046.78    1.387    93.78
2047.78    1.391    93.70
2048.78    1.395    93.62
2049.78    1.398    93.53
2050.78    1.402    93.45
2051.78    1.405    93.37
2052.78    1.409    93.29
2053.78    1.412    93.21
2054.78    1.415    93.13
2055.78    1.418    93.05
2056.78    1.421    92.97
2057.78    1.424    92.89
2058.78    1.427    92.82
2059.78    1.430    92.74
2060.78    1.433    92.66
2061.78    1.435    92.58
2062.78    1.438    92.51
2063.78    1.440    92.43
2064.78    1.442    92.35
2065.78    1.444    92.28
2066.78    1.447    92.20
2067.78    1.449    92.12
2068.78    1.451    92.05
2069.78    1.453    91.97
2070.78    1.454    91.90
2071.78    1.456    91.82
2072.78    1.458    91.75
2073.78    1.459    91.67
2074.78    1.461    91.60
2075.78    1.462    91.52
2076.78    1.464    91.45
2077.78    1.465    91.37
2078.78    1.466    91.30
2079.78    1.467    91.23
2080.78    1.468    91.15
2081.78    1.469    91.08
2082.78    1.470    91.00
2083.78    1.471    90.93
2084.78    1.472    90.86
2085.78    1.473    90.78
2086.78    1.474    90.71
2087.78    1.474    90.64
2088.78    1.475    90.56
2089.78    1.475    90.49
2090.78    1.476    90.42
2091.78    1.476    90.34
2092.78    1.477    90.27
2093.78    1.477    90.20
2094.78    1.477    90.13
2095.78    1.477    90.05
2096.78    1.477    89.98
2097.78    1.478    89.91
2098.78    1.478    89.83
2099.78    1.478    89.76
2100.78    1.477    89.69
2101.78    1.477    89.61
2102.78    1.477    89.54
2103.78    1.477    89.47
2104.78    1.477    89.40
2105.78    1.476    89.32
2106.78    1.476    89.25
2107.78    1.475    89.18
2108.78    1.475    89.10
2109.78    1.474    89.03
2110.78    1.474    88.96
2111.78    1.473    88.88
2112.78    1.472    88.81
2113.78    1.472    88.74
2114.78    1.471    88.66
2115.78    1.470    88.59
2116.78    1.469    88.52
2117.78    1.468    88.44
2118.78    1.467    88.37
2119.78    1.466    88.29
2120.78    1.465    88.22
2121.78    1.464    88.15
2122.78    1.463    88.07
2123.78    1.462    88.00
2124.78    1.460    87.92
2125.78    1.459    87.85
2126.78    1.458    87.77
2127.78    1.456    87.70
2128.78    1.455    87.62
2129.78    1.454    87.55
2130.78    1.452    87.47
2131.78    1.451    87.40
2132.78    1.449    87.32
2133.78    1.447    87.24
2134.78    1.446    87.17
2135.78    1.444    87.09
2136.78    1.442    87.02
2137.78    1.441    86.94
2138.78    1.439    86.86
2139.78    1.437    86.79
2140.78    1.435    86.71
2141.78    1.433    86.63
2142.78    1.431    86.55
2143.78    1.429    86.47
2144.78    1.427    86.40
2145.78    1.425    86.32
2146.78    1.423    86.24
2147.78    1.421    86.16
2148.78    1.419    86.08
2149.78    1.417    86.00
2150.78    1.414    85.92
2151.78    1.412    85.84
2152.78    1.410    85.76
2153.78    1.407    85.68
2154.78    1.405    85.60
2155.78    1.403    85.52
2156.78    1.400    85.44
2157.78    1.398    85.36
2158.78    1.395    85.28
2159.78    1.393    85.20
2160.78    1.390    85.11
2161.78    1.388    85.03
2162.78    1.385    84.95
2163.78    1.382    84.87
2164.78    1.380    84.78
2165.78    1.377    84.70
2166.78    1.374    84.61
2167.78    1.371    84.53
2168.78    1.369    84.44
2169.78    1.366    84.36
2170.78    1.363    84.27
2171.78    1.360    84.19
2172.78    1.357    84.10
2173.78    1.354    84.02
2174.78    1.351    83.93
2175.78    1.348    83.84
2176.78    1.345    83.75
2177.78    1.342    83.66
2178.78    1.339    83.58
2179.78    1.336    83.49
2180.78    1.333    83.40
2181.78    1.329    83.31
2182.78    1.326    83.22
2183.78    1.323    83.13
2184.78    1.320    83.04
2185.78    1.316    82.94
2186.78    1.313    82.85
2187.78    1.310    82.76
2188.78    1.306    82.67
2189.78    1.303    82.57
2190.78    1.300    82.48
2191.78    1.296    82.38
2192.78    1.293    82.29
2193.78    1.289    82.19
2194.78    1.286    82.10
2195.78    1.282    82.00
2196.78    1.278    81.90
2197.78    1.275    81.81
2198.78    1.271    81.71
2199.78    1.268    81.61
2200.78    1.264    81.51
2201.78    1.260    81.41
2202.78    1.256    81.31
2203.78    1.253    81.21
2204.78    1.249    81.11
2205.78    1.245    81.00
2206.78    1.241    80.90
2207.78    1.237    80.80
2208.78    1.234    80.69
2209.78    1.230    80.59
2210.78    1.226    80.48
2211.78    1.222    80.38
2212.78    1.218    80.27
2213.78    1.214    80.16
2214.78    1.210    80.05
2215.78    1.206    79.94
2216.78    1.202    79.83
2217.78    1.198    79.72
2218.78    1.193    79.61
2219.78    1.189    79.50
2220.78    1.185    79.39
2221.78    1.181    79.27
2222.78    1.177    79.16
2223.78    1.173    79.04
2224.78    1.168    78.93
2225.78    1.164    78.81
2226.78    1.160    78.69
2227.78    1.156    78.57
2228.78    1.151    78.45
2229.78    1.147    78.33
2230.78    1.143    78.21
2231.78    1.138    78.09
2232.78    1.134    77.97
2233.78    1.129    77.84
2234.78    1.125    77.72
2235.78    1.121    77.59
2236.78    1.116    77.46
2237.78    1.112    77.33
2238.78    1.107    77.20
2239.78    1.103    77.07
2240.78    1.098    76.94
2241.78    1.093    76.81
2242.78    1.089    76.68
2243.78    1.084    76.54
2244.78    1.080    76.40
2245.78    1.075    76.27
2246.78    1.070    76.13
2247.78    1.066    75.99
2248.78    1.061    75.85
2249.78    1.056    75.71
2250.78    1.052    75.56
2251.78    1.047    75.42
2252.78    1.042    75.27
2253.78    1.037    75.13
2254.78    1.032    74.98
2255.78    1.028    74.83
2256.78    1.023    74.68
2257.78    1.018    74.52
2258.78    1.013    74.37
2259.78    1.008    74.21
2260.78    1.003    74.05
2261.78    0.998    73.90
2262.78    0.994    73.74
2263.78    0.989    73.57
2264.78    0.984    73.41
2265.78    0.979    73.24
2266.78    0.974    73.08
2267.78    0.969    72.91
2268.78    0.964    72.74
2269.78    0.959    72.57
2270.78    0.954    72.39
2271.78    0.949    72.22
2272.78    0.944    72.04
2273.78    0.939    71.86
2274.78    0.933    71.68
2275.78    0.928    71.49
2276.78    0.923    71.31
2277.78    0.918    71.12
2278.78    0.913    70.93






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 18:13:42



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