Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:38:31

Orbital Elements for HU991
WDS: HU991 WDS ID/Discoverer
P: 631.800 Orbital period (years)
a: 1.417 Semi-major axis (arcseconds)
i: 44.8 Inclination (degrees)
Ω: 124.0 Longitude of ascending node (degrees)
T: 1976.850 Epoch of periastron passage (year)
e: 0.829 Eccentricity
ω: 48.4 Longitude of periastron (degrees)
Start-Year: 1710.0 Year
End-Year: 2340.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU991
Position: 230055.69+352157.9 Epoch-2000 right ascension and declination
WDS-ID: 23009+3522 WDS designation
Discoverer Code: HU991 Discover designation and components
ADS number: 16448 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 113642 Hipparcos catalog number
V1: 10.23 Magnitude of the primary
V2: 11.17 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HU991



WDS 6th Orbit including measures of HU991

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)


Ephemeris of HU991
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.069    306.4
-------------------------
1710.0     2.106    347.4
1711.0     2.103    347.5
1712.0     2.101    347.6
1713.0     2.098    347.7
1714.0     2.095    347.8
1715.0     2.092    347.9
1716.0     2.089    348.0
1717.0     2.087    348.1
1718.0     2.084    348.2
1719.0     2.081    348.3
1720.0     2.078    348.4
1721.0     2.075    348.5
1722.0     2.072    348.7
1723.0     2.069    348.8
1724.0     2.066    348.9
1725.0     2.063    349.0
1726.0     2.059    349.1
1727.0     2.056    349.2
1728.0     2.053    349.3
1729.0     2.050    349.4
1730.0     2.047    349.5
1731.0     2.043    349.6
1732.0     2.040    349.7
1733.0     2.037    349.8
1734.0     2.033    349.9
1735.0     2.030    350.1
1736.0     2.026    350.2
1737.0     2.023    350.3
1738.0     2.020    350.4
1739.0     2.016    350.5
1740.0     2.012    350.6
1741.0     2.009    350.7
1742.0     2.005    350.8
1743.0     2.002    351.0
1744.0     1.998    351.1
1745.0     1.994    351.2
1746.0     1.991    351.3
1747.0     1.987    351.4
1748.0     1.983    351.5
1749.0     1.979    351.6
1750.0     1.975    351.8
1751.0     1.972    351.9
1752.0     1.968    352.0
1753.0     1.964    352.1
1754.0     1.960    352.2
1755.0     1.956    352.3
1756.0     1.952    352.5
1757.0     1.948    352.6
1758.0     1.944    352.7
1759.0     1.940    352.8
1760.0     1.935    352.9
1761.0     1.931    353.1
1762.0     1.927    353.2
1763.0     1.923    353.3
1764.0     1.919    353.4
1765.0     1.914    353.6
1766.0     1.910    353.7
1767.0     1.906    353.8
1768.0     1.901    353.9
1769.0     1.897    354.1
1770.0     1.892    354.2
1771.0     1.888    354.3
1772.0     1.883    354.4
1773.0     1.879    354.6
1774.0     1.874    354.7
1775.0     1.870    354.8
1776.0     1.865    355.0
1777.0     1.860    355.1
1778.0     1.856    355.2
1779.0     1.851    355.3
1780.0     1.846    355.5
1781.0     1.842    355.6
1782.0     1.837    355.7
1783.0     1.832    355.9
1784.0     1.827    356.0
1785.0     1.822    356.2
1786.0     1.817    356.3
1787.0     1.812    356.4
1788.0     1.807    356.6
1789.0     1.802    356.7
1790.0     1.797    356.8
1791.0     1.792    357.0
1792.0     1.787    357.1
1793.0     1.782    357.3
1794.0     1.777    357.4
1795.0     1.772    357.6
1796.0     1.766    357.7
1797.0     1.761    357.9
1798.0     1.756    358.0
1799.0     1.750    358.1
1800.0     1.745    358.3
1801.0     1.740    358.4
1802.0     1.734    358.6
1803.0     1.729    358.7
1804.0     1.723    358.9
1805.0     1.718    359.1
1806.0     1.712    359.2
1807.0     1.707    359.4
1808.0     1.701    359.5
1809.0     1.695    359.7
1810.0     1.690    359.8
1811.0     1.684    360.0
1812.0     1.678      0.2
1813.0     1.672      0.3
1814.0     1.667      0.5
1815.0     1.661      0.6
1816.0     1.655      0.8
1817.0     1.649      1.0
1818.0     1.643      1.1
1819.0     1.637      1.3
1820.0     1.631      1.5
1821.0     1.625      1.7
1822.0     1.619      1.8
1823.0     1.613      2.0
1824.0     1.607      2.2
1825.0     1.600      2.4
1826.0     1.594      2.5
1827.0     1.588      2.7
1828.0     1.582      2.9
1829.0     1.575      3.1
1830.0     1.569      3.3
1831.0     1.563      3.4
1832.0     1.556      3.6
1833.0     1.550      3.8
1834.0     1.543      4.0
1835.0     1.537      4.2
1836.0     1.530      4.4
1837.0     1.524      4.6
1838.0     1.517      4.8
1839.0     1.510      5.0
1840.0     1.504      5.2
1841.0     1.497      5.4
1842.0     1.490      5.6
1843.0     1.483      5.8
1844.0     1.477      6.0
1845.0     1.470      6.2
1846.0     1.463      6.4
1847.0     1.456      6.6
1848.0     1.449      6.8
1849.0     1.442      7.1
1850.0     1.435      7.3
1851.0     1.428      7.5
1852.0     1.421      7.7
1853.0     1.413      8.0
1854.0     1.406      8.2
1855.0     1.399      8.4
1856.0     1.392      8.6
1857.0     1.384      8.9
1858.0     1.377      9.1
1859.0     1.370      9.4
1860.0     1.362      9.6
1861.0     1.355      9.8
1862.0     1.347     10.1
1863.0     1.340     10.3
1864.0     1.332     10.6
1865.0     1.325     10.9
1866.0     1.317     11.1
1867.0     1.309     11.4
1868.0     1.302     11.7
1869.0     1.294     11.9
1870.0     1.286     12.2
1871.0     1.278     12.5
1872.0     1.271     12.7
1873.0     1.263     13.0
1874.0     1.255     13.3
1875.0     1.247     13.6
1876.0     1.239     13.9
1877.0     1.231     14.2
1878.0     1.223     14.5
1879.0     1.214     14.8
1880.0     1.206     15.1
1881.0     1.198     15.4
1882.0     1.190     15.8
1883.0     1.181     16.1
1884.0     1.173     16.4
1885.0     1.165     16.7
1886.0     1.156     17.1
1887.0     1.148     17.4
1888.0     1.139     17.8
1889.0     1.131     18.1
1890.0     1.122     18.5
1891.0     1.114     18.8
1892.0     1.105     19.2
1893.0     1.096     19.6
1894.0     1.088     20.0
1895.0     1.079     20.3
1896.0     1.070     20.7
1897.0     1.061     21.1
1898.0     1.052     21.5
1899.0     1.043     22.0
1900.0     1.034     22.4
1901.0     1.025     22.8
1902.0     1.016     23.2
1903.0     1.007     23.7
1904.0     0.998     24.1
1905.0     0.989     24.6
1906.0     0.980     25.1
1907.0     0.971     25.5
1908.0     0.961     26.0
1909.0     0.952     26.5
1910.0     0.943     27.0
1911.0     0.933     27.5
1912.0     0.924     28.1
1913.0     0.914     28.6
1914.0     0.905     29.2
1915.0     0.895     29.7
1916.0     0.886     30.3
1917.0     0.876     30.9
1918.0     0.866     31.5
1919.0     0.857     32.1
1920.0     0.847     32.7
1921.0     0.837     33.4
1922.0     0.827     34.0
1923.0     0.817     34.7
1924.0     0.807     35.4
1925.0     0.798     36.1
1926.0     0.788     36.8
1927.0     0.778     37.5
1928.0     0.768     38.3
1929.0     0.757     39.1
1930.0     0.747     39.9
1931.0     0.737     40.7
1932.0     0.727     41.6
1933.0     0.717     42.4
1934.0     0.707     43.3
1935.0     0.696     44.2
1936.0     0.686     45.2
1937.0     0.676     46.2
1938.0     0.666     47.2
1939.0     0.655     48.2
1940.0     0.645     49.3
1941.0     0.635     50.4
1942.0     0.624     51.6
1943.0     0.614     52.7
1944.0     0.603     54.0
1945.0     0.593     55.2
1946.0     0.582     56.5
1947.0     0.572     57.9
1948.0     0.561     59.3
1949.0     0.551     60.8
1950.0     0.540     62.3
1951.0     0.530     63.9
1952.0     0.519     65.6
1953.0     0.509     67.3
1954.0     0.498     69.1
1955.0     0.487     70.9
1956.0     0.477     72.9
1957.0     0.466     74.9
1958.0     0.455     77.1
1959.0     0.445     79.3
1960.0     0.434     81.7
1961.0     0.423     84.1
1962.0     0.412     86.7
1963.0     0.401     89.5
1964.0     0.389     92.4
1965.0     0.378     95.5
1966.0     0.366     98.8
1967.0     0.354    102.3
1968.0     0.341    106.1
1969.0     0.328    110.1
1970.0     0.314    114.5
1971.0     0.299    119.4
1972.0     0.284    124.7
1973.0     0.268    130.7
1974.0     0.251    137.4
1975.0     0.234    145.2
1976.0     0.218    154.0
1977.0     0.204    164.3
1978.0     0.193    175.8
1979.0     0.187    188.5
1980.0     0.187    201.5
1981.0     0.194    214.0
1982.0     0.207    225.4
1983.0     0.224    235.2
1984.0     0.245    243.5
1985.0     0.268    250.5
1986.0     0.292    256.3
1987.0     0.317    261.2
1988.0     0.343    265.3
1989.0     0.368    268.9
1990.0     0.394    272.1
1991.0     0.419    274.8
1992.0     0.444    277.2
1993.0     0.469    279.4
1994.0     0.493    281.4
1995.0     0.517    283.2
1996.0     0.541    284.8
1997.0     0.564    286.3
1998.0     0.586    287.6
1999.0     0.608    288.9
2000.0     0.630    290.1
2001.0     0.651    291.2
2002.0     0.672    292.3
2003.0     0.693    293.2
2004.0     0.713    294.1
2005.0     0.733    295.0
2006.0     0.752    295.8
2007.0     0.771    296.6
2008.0     0.790    297.4
2009.0     0.809    298.1
2010.0     0.827    298.8
2011.0     0.845    299.4
2012.0     0.862    300.0
2013.0     0.880    300.6
2014.0     0.897    301.2
2015.0     0.914    301.8
2016.0     0.930    302.3
2017.0     0.947    302.8
2018.0     0.963    303.3
2019.0     0.979    303.8
2020.0     0.994    304.3
2021.0     1.010    304.7
2022.0     1.025    305.1
2023.0     1.040    305.6
2024.0     1.054    306.0
2025.0     1.069    306.4
2026.0     1.083    306.8
2027.0     1.098    307.2
2028.0     1.112    307.5
2029.0     1.125    307.9
2030.0     1.139    308.2
2031.0     1.152    308.6
2032.0     1.166    308.9
2033.0     1.179    309.3
2034.0     1.192    309.6
2035.0     1.205    309.9
2036.0     1.217    310.2
2037.0     1.230    310.5
2038.0     1.242    310.8
2039.0     1.254    311.1
2040.0     1.266    311.4
2041.0     1.278    311.7
2042.0     1.290    311.9
2043.0     1.302    312.2
2044.0     1.313    312.5
2045.0     1.325    312.7
2046.0     1.336    313.0
2047.0     1.347    313.3
2048.0     1.358    313.5
2049.0     1.369    313.7
2050.0     1.380    314.0
2051.0     1.390    314.2
2052.0     1.401    314.5
2053.0     1.411    314.7
2054.0     1.422    314.9
2055.0     1.432    315.1
2056.0     1.442    315.4
2057.0     1.452    315.6
2058.0     1.462    315.8
2059.0     1.472    316.0
2060.0     1.481    316.2
2061.0     1.491    316.4
2062.0     1.500    316.6
2063.0     1.510    316.8
2064.0     1.519    317.0
2065.0     1.528    317.2
2066.0     1.537    317.4
2067.0     1.546    317.6
2068.0     1.555    317.8
2069.0     1.564    318.0
2070.0     1.573    318.1
2071.0     1.581    318.3
2072.0     1.590    318.5
2073.0     1.598    318.7
2074.0     1.607    318.9
2075.0     1.615    319.0
2076.0     1.623    319.2
2077.0     1.631    319.4
2078.0     1.639    319.6
2079.0     1.647    319.7
2080.0     1.655    319.9
2081.0     1.663    320.1
2082.0     1.671    320.2
2083.0     1.678    320.4
2084.0     1.686    320.5
2085.0     1.694    320.7
2086.0     1.701    320.9
2087.0     1.708    321.0
2088.0     1.716    321.2
2089.0     1.723    321.3
2090.0     1.730    321.5
2091.0     1.737    321.6
2092.0     1.744    321.8
2093.0     1.751    321.9
2094.0     1.758    322.1
2095.0     1.765    322.2
2096.0     1.771    322.4
2097.0     1.778    322.5
2098.0     1.785    322.7
2099.0     1.791    322.8
2100.0     1.798    322.9
2101.0     1.804    323.1
2102.0     1.810    323.2
2103.0     1.817    323.4
2104.0     1.823    323.5
2105.0     1.829    323.6
2106.0     1.835    323.8
2107.0     1.841    323.9
2108.0     1.847    324.0
2109.0     1.853    324.2
2110.0     1.859    324.3
2111.0     1.865    324.4
2112.0     1.870    324.6
2113.0     1.876    324.7
2114.0     1.882    324.8
2115.0     1.887    324.9
2116.0     1.893    325.1
2117.0     1.898    325.2
2118.0     1.904    325.3
2119.0     1.909    325.4
2120.0     1.914    325.6
2121.0     1.919    325.7
2122.0     1.924    325.8
2123.0     1.930    325.9
2124.0     1.935    326.1
2125.0     1.940    326.2
2126.0     1.945    326.3
2127.0     1.950    326.4
2128.0     1.954    326.5
2129.0     1.959    326.7
2130.0     1.964    326.8
2131.0     1.969    326.9
2132.0     1.973    327.0
2133.0     1.978    327.1
2134.0     1.982    327.2
2135.0     1.987    327.4
2136.0     1.991    327.5
2137.0     1.996    327.6
2138.0     2.000    327.7
2139.0     2.004    327.8
2140.0     2.009    327.9
2141.0     2.013    328.0
2142.0     2.017    328.1
2143.0     2.021    328.3
2144.0     2.025    328.4
2145.0     2.029    328.5
2146.0     2.033    328.6
2147.0     2.037    328.7
2148.0     2.041    328.8
2149.0     2.045    328.9
2150.0     2.049    329.0
2151.0     2.052    329.1
2152.0     2.056    329.2
2153.0     2.060    329.4
2154.0     2.063    329.5
2155.0     2.067    329.6
2156.0     2.070    329.7
2157.0     2.074    329.8
2158.0     2.077    329.9
2159.0     2.081    330.0
2160.0     2.084    330.1
2161.0     2.087    330.2
2162.0     2.090    330.3
2163.0     2.094    330.4
2164.0     2.097    330.5
2165.0     2.100    330.6
2166.0     2.103    330.7
2167.0     2.106    330.8
2168.0     2.109    330.9
2169.0     2.112    331.0
2170.0     2.115    331.1
2171.0     2.118    331.2
2172.0     2.121    331.3
2173.0     2.123    331.4
2174.0     2.126    331.5
2175.0     2.129    331.6
2176.0     2.132    331.7
2177.0     2.134    331.8
2178.0     2.137    331.9
2179.0     2.139    332.0
2180.0     2.142    332.1
2181.0     2.144    332.2
2182.0     2.147    332.3
2183.0     2.149    332.4
2184.0     2.152    332.5
2185.0     2.154    332.6
2186.0     2.156    332.7
2187.0     2.158    332.8
2188.0     2.161    332.9
2189.0     2.163    333.0
2190.0     2.165    333.1
2191.0     2.167    333.2
2192.0     2.169    333.3
2193.0     2.171    333.4
2194.0     2.173    333.5
2195.0     2.175    333.6
2196.0     2.177    333.7
2197.0     2.179    333.8
2198.0     2.181    333.9
2199.0     2.183    334.0
2200.0     2.184    334.1
2201.0     2.186    334.2
2202.0     2.188    334.3
2203.0     2.189    334.3
2204.0     2.191    334.4
2205.0     2.193    334.5
2206.0     2.194    334.6
2207.0     2.196    334.7
2208.0     2.197    334.8
2209.0     2.199    334.9
2210.0     2.200    335.0
2211.0     2.201    335.1
2212.0     2.203    335.2
2213.0     2.204    335.3
2214.0     2.205    335.4
2215.0     2.206    335.5
2216.0     2.208    335.6
2217.0     2.209    335.7
2218.0     2.210    335.8
2219.0     2.211    335.8
2220.0     2.212    335.9
2221.0     2.213    336.0
2222.0     2.214    336.1
2223.0     2.215    336.2
2224.0     2.216    336.3
2225.0     2.217    336.4
2226.0     2.218    336.5
2227.0     2.219    336.6
2228.0     2.219    336.7
2229.0     2.220    336.8
2230.0     2.221    336.9
2231.0     2.222    337.0
2232.0     2.222    337.0
2233.0     2.223    337.1
2234.0     2.223    337.2
2235.0     2.224    337.3
2236.0     2.225    337.4
2237.0     2.225    337.5
2238.0     2.225    337.6
2239.0     2.226    337.7
2240.0     2.226    337.8
2241.0     2.227    337.9
2242.0     2.227    338.0
2243.0     2.227    338.1
2244.0     2.228    338.1
2245.0     2.228    338.2
2246.0     2.228    338.3
2247.0     2.228    338.4
2248.0     2.228    338.5
2249.0     2.228    338.6
2250.0     2.228    338.7
2251.0     2.229    338.8
2252.0     2.229    338.9
2253.0     2.229    339.0
2254.0     2.228    339.1
2255.0     2.228    339.2
2256.0     2.228    339.2
2257.0     2.228    339.3
2258.0     2.228    339.4
2259.0     2.228    339.5
2260.0     2.227    339.6
2261.0     2.227    339.7
2262.0     2.227    339.8
2263.0     2.227    339.9
2264.0     2.226    340.0
2265.0     2.226    340.1
2266.0     2.225    340.2
2267.0     2.225    340.3
2268.0     2.224    340.3
2269.0     2.224    340.4
2270.0     2.223    340.5
2271.0     2.223    340.6
2272.0     2.222    340.7
2273.0     2.222    340.8
2274.0     2.221    340.9
2275.0     2.220    341.0
2276.0     2.219    341.1
2277.0     2.219    341.2
2278.0     2.218    341.3
2279.0     2.217    341.4
2280.0     2.216    341.4
2281.0     2.215    341.5
2282.0     2.214    341.6
2283.0     2.213    341.7
2284.0     2.213    341.8
2285.0     2.212    341.9
2286.0     2.210    342.0
2287.0     2.209    342.1
2288.0     2.208    342.2
2289.0     2.207    342.3
2290.0     2.206    342.4
2291.0     2.205    342.5
2292.0     2.204    342.6
2293.0     2.202    342.7
2294.0     2.201    342.7
2295.0     2.200    342.8
2296.0     2.198    342.9
2297.0     2.197    343.0
2298.0     2.196    343.1
2299.0     2.194    343.2
2300.0     2.193    343.3
2301.0     2.191    343.4
2302.0     2.190    343.5
2303.0     2.188    343.6
2304.0     2.187    343.7
2305.0     2.185    343.8
2306.0     2.184    343.9
2307.0     2.182    344.0
2308.0     2.180    344.1
2309.0     2.178    344.2
2310.0     2.177    344.3
2311.0     2.175    344.4
2312.0     2.173    344.5
2313.0     2.171    344.6
2314.0     2.169    344.6
2315.0     2.168    344.7
2316.0     2.166    344.8
2317.0     2.164    344.9
2318.0     2.162    345.0
2319.0     2.160    345.1
2320.0     2.158    345.2
2321.0     2.156    345.3
2322.0     2.154    345.4
2323.0     2.151    345.5
2324.0     2.149    345.6
2325.0     2.147    345.7
2326.0     2.145    345.8
2327.0     2.143    345.9
2328.0     2.140    346.0
2329.0     2.138    346.1
2330.0     2.136    346.2
2331.0     2.133    346.3
2332.0     2.131    346.4
2333.0     2.129    346.5
2334.0     2.126    346.6
2335.0     2.124    346.7
2336.0     2.121    346.8
2337.0     2.119    346.9
2338.0     2.116    347.0
2339.0     2.113    347.1






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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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