Double Star Calculator - Orbit

Orbital Elements for BU1203
WDS: BU1203 WDS ID/Discoverer
P: 495.730 Orbital period (years)
a: 0.5151 Semi-major axis (arcseconds)
i: 59.29 Inclination (degrees)
Ω: 17.64 Longitude of ascending node (degrees)
T: 2315.020 Epoch of periastron passage (year)
e: 0.4634 Eccentricity
ω: 317.13 Longitude of periastron (degrees)
Start-Year: 1777.135 Year
End-Year: 2272.865 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU1203
Position: 182603.38+004649.7 Epoch-2000 right ascension and declination
WDS-ID: 18261+0047 WDS designation
Discoverer Code: BU1203 Discover designation and components
ADS number: 11339 Aitken Double Star catalog
HD number: 169725 HD catalog number
Hipparcos number: 90347 Hipparcos catalog number
V1: 7.11 Magnitude of the primary
V2: 8.73 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1991 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Pop1996b Reference

Double Star Orbit for BU1203



WDS 6th Orbit including measures of BU1203

-- 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 BU1203
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.523   161.28
--------------------------
1777.13    0.244   239.41
1778.13    0.238   240.92
1779.13    0.231   242.51
1780.13    0.226   244.18
1781.13    0.220   245.94
1782.13    0.214   247.79
1783.13    0.208   249.75
1784.13    0.203   251.81
1785.13    0.198   253.99
1786.13    0.192   256.28
1787.13    0.188   258.69
1788.13    0.183   261.24
1789.13    0.179   263.91
1790.13    0.174   266.71
1791.13    0.171   269.64
1792.13    0.167   272.69
1793.13    0.164   275.87
1794.13    0.162   279.16
1795.13    0.159   282.54
1796.13    0.158   286.01
1797.13    0.156   289.55
1798.13    0.156   293.13
1799.13    0.155   296.74
1800.13    0.156   300.35
1801.13    0.156   303.93
1802.13    0.157   307.48
1803.13    0.159   310.96
1804.13    0.161   314.36
1805.13    0.164   317.67
1806.13    0.166   320.87
1807.13    0.170   323.96
1808.13    0.173   326.93
1809.13    0.177   329.77
1810.13    0.181   332.50
1811.13    0.185   335.10
1812.13    0.190   337.58
1813.13    0.194   339.94
1814.13    0.199   342.20
1815.13    0.204   344.35
1816.13    0.209   346.40
1817.13    0.214   348.35
1818.13    0.219   350.22
1819.13    0.223   352.01
1820.13    0.228   353.72
1821.13    0.233   355.35
1822.13    0.238   356.93
1823.13    0.243   358.44
1824.13    0.247   359.89
1825.13    0.252     1.29
1826.13    0.256     2.64
1827.13    0.261     3.95
1828.13    0.265     5.21
1829.13    0.269     6.44
1830.13    0.273     7.63
1831.13    0.276     8.78
1832.13    0.280     9.91
1833.13    0.283    11.01
1834.13    0.287    12.08
1835.13    0.290    13.13
1836.13    0.293    14.16
1837.13    0.296    15.17
1838.13    0.298    16.16
1839.13    0.301    17.13
1840.13    0.303    18.09
1841.13    0.305    19.03
1842.13    0.307    19.96
1843.13    0.309    20.88
1844.13    0.311    21.79
1845.13    0.312    22.68
1846.13    0.314    23.57
1847.13    0.315    24.46
1848.13    0.316    25.33
1849.13    0.317    26.20
1850.13    0.318    27.06
1851.13    0.319    27.92
1852.13    0.320    28.78
1853.13    0.320    29.63
1854.13    0.321    30.48
1855.13    0.321    31.33
1856.13    0.321    32.17
1857.13    0.321    33.02
1858.13    0.321    33.86
1859.13    0.321    34.71
1860.13    0.321    35.55
1861.13    0.321    36.40
1862.13    0.321    37.24
1863.13    0.320    38.09
1864.13    0.320    38.94
1865.13    0.319    39.80
1866.13    0.319    40.65
1867.13    0.318    41.51
1868.13    0.318    42.37
1869.13    0.317    43.24
1870.13    0.316    44.11
1871.13    0.315    44.98
1872.13    0.315    45.86
1873.13    0.314    46.75
1874.13    0.313    47.63
1875.13    0.312    48.53
1876.13    0.311    49.43
1877.13    0.310    50.33
1878.13    0.309    51.24
1879.13    0.308    52.15
1880.13    0.307    53.07
1881.13    0.306    54.00
1882.13    0.305    54.93
1883.13    0.304    55.87
1884.13    0.303    56.81
1885.13    0.302    57.76
1886.13    0.301    58.72
1887.13    0.301    59.68
1888.13    0.300    60.65
1889.13    0.299    61.62
1890.13    0.298    62.60
1891.13    0.297    63.59
1892.13    0.296    64.58
1893.13    0.295    65.58
1894.13    0.294    66.58
1895.13    0.294    67.59
1896.13    0.293    68.60
1897.13    0.292    69.62
1898.13    0.292    70.65
1899.13    0.291    71.67
1900.13    0.290    72.71
1901.13    0.290    73.74
1902.13    0.289    74.78
1903.13    0.289    75.82
1904.13    0.289    76.87
1905.13    0.288    77.92
1906.13    0.288    78.97
1907.13    0.288    80.02
1908.13    0.287    81.08
1909.13    0.287    82.13
1910.13    0.287    83.19
1911.13    0.287    84.25
1912.13    0.287    85.31
1913.13    0.287    86.36
1914.13    0.287    87.42
1915.13    0.288    88.48
1916.13    0.288    89.53
1917.13    0.288    90.58
1918.13    0.288    91.63
1919.13    0.289    92.68
1920.13    0.289    93.72
1921.13    0.290    94.76
1922.13    0.290    95.80
1923.13    0.291    96.83
1924.13    0.292    97.86
1925.13    0.293    98.88
1926.13    0.293    99.90
1927.13    0.294   100.91
1928.13    0.295   101.91
1929.13    0.296   102.91
1930.13    0.297   103.90
1931.13    0.298   104.88
1932.13    0.299   105.86
1933.13    0.301   106.83
1934.13    0.302   107.79
1935.13    0.303   108.74
1936.13    0.305   109.69
1937.13    0.306   110.62
1938.13    0.307   111.55
1939.13    0.309   112.47
1940.13    0.311   113.38
1941.13    0.312   114.28
1942.13    0.314   115.17
1943.13    0.315   116.05
1944.13    0.317   116.92
1945.13    0.319   117.78
1946.13    0.321   118.63
1947.13    0.323   119.48
1948.13    0.325   120.31
1949.13    0.327   121.13
1950.13    0.328   121.94
1951.13    0.331   122.75
1952.13    0.333   123.54
1953.13    0.335   124.32
1954.13    0.337   125.10
1955.13    0.339   125.86
1956.13    0.341   126.62
1957.13    0.343   127.36
1958.13    0.346   128.10
1959.13    0.348   128.82
1960.13    0.350   129.54
1961.13    0.352   130.24
1962.13    0.355   130.94
1963.13    0.357   131.63
1964.13    0.360   132.31
1965.13    0.362   132.98
1966.13    0.364   133.64
1967.13    0.367   134.29
1968.13    0.369   134.93
1969.13    0.372   135.57
1970.13    0.374   136.20
1971.13    0.377   136.81
1972.13    0.379   137.42
1973.13    0.382   138.03
1974.13    0.385   138.62
1975.13    0.387   139.21
1976.13    0.390   139.78
1977.13    0.392   140.35
1978.13    0.395   140.92
1979.13    0.398   141.47
1980.13    0.400   142.02
1981.13    0.403   142.56
1982.13    0.406   143.09
1983.13    0.408   143.62
1984.13    0.411   144.14
1985.13    0.414   144.65
1986.13    0.416   145.16
1987.13    0.419   145.66
1988.13    0.422   146.15
1989.13    0.424   146.64
1990.13    0.427   147.12
1991.13    0.430   147.60
1992.13    0.432   148.07
1993.13    0.435   148.53
1994.13    0.438   148.99
1995.13    0.441   149.44
1996.13    0.443   149.89
1997.13    0.446   150.33
1998.13    0.449   150.76
1999.13    0.451   151.19
2000.13    0.454   151.62
2001.13    0.457   152.04
2002.13    0.459   152.46
2003.13    0.462   152.87
2004.13    0.465   153.27
2005.13    0.468   153.67
2006.13    0.470   154.07
2007.13    0.473   154.46
2008.13    0.476   154.85
2009.13    0.478   155.23
2010.13    0.481   155.61
2011.13    0.483   155.99
2012.13    0.486   156.36
2013.13    0.489   156.73
2014.13    0.491   157.09
2015.13    0.494   157.45
2016.13    0.497   157.80
2017.13    0.499   158.15
2018.13    0.502   158.50
2019.13    0.504   158.85
2020.13    0.507   159.19
2021.13    0.509   159.53
2022.13    0.512   159.86
2023.13    0.515   160.19
2024.13    0.517   160.52
2025.13    0.520   160.84
2026.13    0.522   161.16
2027.13    0.525   161.48
2028.13    0.527   161.80
2029.13    0.530   162.11
2030.13    0.532   162.42
2031.13    0.534   162.73
2032.13    0.537   163.03
2033.13    0.539   163.33
2034.13    0.542   163.63
2035.13    0.544   163.93
2036.13    0.546   164.22
2037.13    0.549   164.51
2038.13    0.551   164.80
2039.13    0.553   165.08
2040.13    0.556   165.37
2041.13    0.558   165.65
2042.13    0.560   165.93
2043.13    0.563   166.21
2044.13    0.565   166.48
2045.13    0.567   166.75
2046.13    0.569   167.02
2047.13    0.571   167.29
2048.14    0.574   167.56
2049.14    0.576   167.82
2050.14    0.578   168.08
2051.14    0.580   168.34
2052.14    0.582   168.60
2053.14    0.584   168.86
2054.14    0.586   169.11
2055.14    0.588   169.36
2056.14    0.590   169.62
2057.14    0.592   169.86
2058.14    0.594   170.11
2059.14    0.596   170.36
2060.14    0.598   170.60
2061.14    0.600   170.85
2062.14    0.602   171.09
2063.14    0.604   171.33
2064.14    0.606   171.57
2065.14    0.608   171.80
2066.14    0.610   172.04
2067.14    0.611   172.27
2068.14    0.613   172.50
2069.14    0.615   172.74
2070.14    0.617   172.97
2071.14    0.618   173.19
2072.14    0.620   173.42
2073.14    0.622   173.65
2074.14    0.623   173.87
2075.14    0.625   174.10
2076.14    0.627   174.32
2077.14    0.628   174.54
2078.14    0.630   174.76
2079.14    0.631   174.98
2080.14    0.633   175.20
2081.14    0.634   175.42
2082.14    0.636   175.63
2083.14    0.637   175.85
2084.14    0.639   176.06
2085.14    0.640   176.27
2086.14    0.641   176.49
2087.14    0.643   176.70
2088.14    0.644   176.91
2089.14    0.645   177.12
2090.14    0.647   177.33
2091.14    0.648   177.54
2092.14    0.649   177.74
2093.14    0.650   177.95
2094.14    0.652   178.15
2095.14    0.653   178.36
2096.14    0.654   178.56
2097.14    0.655   178.77
2098.14    0.656   178.97
2099.14    0.657   179.17
2100.14    0.658   179.37
2101.14    0.659   179.58
2102.14    0.660   179.78
2103.14    0.661   179.98
2104.14    0.662   180.18
2105.14    0.663   180.37
2106.14    0.664   180.57
2107.14    0.664   180.77
2108.14    0.665   180.97
2109.14    0.666   181.16
2110.14    0.667   181.36
2111.14    0.667   181.56
2112.14    0.668   181.75
2113.14    0.669   181.95
2114.14    0.669   182.14
2115.14    0.670   182.34
2116.14    0.671   182.53
2117.14    0.671   182.72
2118.14    0.672   182.92
2119.14    0.672   183.11
2120.14    0.672   183.30
2121.14    0.673   183.50
2122.14    0.673   183.69
2123.14    0.674   183.88
2124.14    0.674   184.07
2125.14    0.674   184.27
2126.14    0.674   184.46
2127.14    0.675   184.65
2128.14    0.675   184.84
2129.14    0.675   185.03
2130.14    0.675   185.22
2131.14    0.675   185.41
2132.14    0.675   185.61
2133.14    0.675   185.80
2134.14    0.675   185.99
2135.14    0.675   186.18
2136.14    0.675   186.37
2137.14    0.675   186.56
2138.14    0.675   186.75
2139.14    0.675   186.94
2140.14    0.675   187.14
2141.14    0.674   187.33
2142.14    0.674   187.52
2143.14    0.674   187.71
2144.14    0.673   187.90
2145.14    0.673   188.10
2146.14    0.673   188.29
2147.14    0.672   188.48
2148.14    0.672   188.67
2149.14    0.671   188.87
2150.14    0.671   189.06
2151.14    0.670   189.26
2152.14    0.669   189.45
2153.14    0.669   189.65
2154.14    0.668   189.84
2155.14    0.667   190.04
2156.14    0.666   190.23
2157.14    0.666   190.43
2158.14    0.665   190.63
2159.14    0.664   190.82
2160.14    0.663   191.02
2161.14    0.662   191.22
2162.14    0.661   191.42
2163.14    0.660   191.62
2164.14    0.659   191.82
2165.14    0.658   192.02
2166.14    0.656   192.22
2167.14    0.655   192.43
2168.14    0.654   192.63
2169.14    0.653   192.83
2170.14    0.651   193.04
2171.14    0.650   193.24
2172.14    0.649   193.45
2173.14    0.647   193.66
2174.14    0.646   193.87
2175.14    0.644   194.08
2176.14    0.642   194.29
2177.14    0.641   194.50
2178.14    0.639   194.71
2179.14    0.637   194.93
2180.14    0.635   195.14
2181.14    0.634   195.36
2182.14    0.632   195.58
2183.14    0.630   195.80
2184.14    0.628   196.02
2185.14    0.626   196.24
2186.14    0.624   196.46
2187.14    0.622   196.69
2188.14    0.620   196.91
2189.14    0.617   197.14
2190.14    0.615   197.37
2191.14    0.613   197.60
2192.14    0.611   197.83
2193.14    0.608   198.07
2194.14    0.606   198.31
2195.14    0.603   198.55
2196.14    0.601   198.79
2197.14    0.598   199.03
2198.14    0.595   199.27
2199.14    0.593   199.52
2200.14    0.590   199.77
2201.14    0.587   200.02
2202.14    0.584   200.28
2203.14    0.582   200.53
2204.14    0.579   200.79
2205.14    0.576   201.05
2206.14    0.573   201.32
2207.14    0.569   201.58
2208.14    0.566   201.86
2209.14    0.563   202.13
2210.14    0.560   202.41
2211.14    0.556   202.69
2212.14    0.553   202.97
2213.14    0.550   203.26
2214.14    0.546   203.55
2215.14    0.543   203.84
2216.14    0.539   204.14
2217.14    0.535   204.44
2218.14    0.532   204.75
2219.14    0.528   205.06
2220.14    0.524   205.37
2221.14    0.520   205.69
2222.14    0.516   206.02
2223.14    0.512   206.35
2224.14    0.508   206.68
2225.14    0.504   207.02
2226.14    0.500   207.37
2227.14    0.496   207.72
2228.14    0.491   208.08
2229.14    0.487   208.44
2230.14    0.482   208.81
2231.14    0.478   209.19
2232.14    0.473   209.58
2233.14    0.469   209.97
2234.14    0.464   210.37
2235.14    0.459   210.78
2236.14    0.455   211.20
2237.14    0.450   211.62
2238.14    0.445   212.06
2239.14    0.440   212.50
2240.14    0.435   212.96
2241.14    0.430   213.43
2242.14    0.425   213.90
2243.14    0.419   214.39
2244.14    0.414   214.90
2245.14    0.409   215.41
2246.14    0.403   215.94
2247.14    0.398   216.48
2248.14    0.393   217.04
2249.14    0.387   217.61
2250.14    0.381   218.21
2251.14    0.376   218.81
2252.14    0.370   219.44
2253.14    0.364   220.09
2254.14    0.358   220.76
2255.14    0.352   221.45
2256.14    0.347   222.16
2257.14    0.341   222.90
2258.14    0.335   223.66
2259.14    0.329   224.46
2260.14    0.322   225.28
2261.14    0.316   226.14
2262.14    0.310   227.02
2263.14    0.304   227.95
2264.14    0.298   228.91
2265.14    0.292   229.92
2266.14    0.285   230.96
2267.14    0.279   232.06
2268.14    0.273   233.20
2269.14    0.267   234.40
2270.14    0.260   235.66
2271.14    0.254   236.98
2272.14    0.248   238.36






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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.


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Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 17:51:52



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