Double Star Calculator - Orbit

Orbital Elements for HO391AB
WDS: HO391AB WDS ID/Discoverer
P: 536.000 Orbital period (years)
a: 2.263 Semi-major axis (arcseconds)
i: 128.1 Inclination (degrees)
Ω: 107.7 Longitude of ascending node (degrees)
T: 2016.700 Epoch of periastron passage (year)
e: 0.376 Eccentricity
ω: 70.4 Longitude of periastron (degrees)
Start-Year: 1757.0 Year
End-Year: 2293.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for HO391AB
Position: 150407.07-065314.4 Epoch-2000 right ascension and declination
WDS-ID: 15041-0653 WDS designation
Discoverer Code: HO391AB Discover designation and components
ADS number: 9492 Aitken Double Star catalog
HD number: 133352 HD catalog number
Hipparcos number: 73717 Hipparcos catalog number
V1: 7.83 Magnitude of the primary
V2: 11.34 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Lin2013b Reference

Double Star Orbit for HO391AB



WDS 6th Orbit including measures of HO391AB

-- 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 HO391AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.884    24.23
--------------------------
1757.00    2.047   223.87
1758.00    2.042   223.40
1759.00    2.037   222.93
1760.00    2.032   222.46
1761.00    2.028   221.98
1762.00    2.023   221.50
1763.00    2.018   221.02
1764.00    2.013   220.53
1765.00    2.008   220.05
1766.00    2.004   219.56
1767.00    1.999   219.07
1768.00    1.994   218.57
1769.00    1.990   218.08
1770.00    1.985   217.58
1771.00    1.981   217.08
1772.00    1.976   216.58
1773.00    1.972   216.07
1774.00    1.967   215.57
1775.00    1.963   215.06
1776.00    1.959   214.54
1777.00    1.955   214.03
1778.00    1.950   213.52
1779.00    1.946   213.00
1780.00    1.942   212.48
1781.00    1.938   211.95
1782.00    1.934   211.43
1783.00    1.930   210.90
1784.00    1.927   210.37
1785.00    1.923   209.84
1786.00    1.919   209.31
1787.00    1.915   208.78
1788.00    1.912   208.24
1789.00    1.908   207.70
1790.00    1.905   207.16
1791.00    1.901   206.62
1792.00    1.898   206.07
1793.00    1.895   205.52
1794.00    1.892   204.97
1795.00    1.889   204.42
1796.00    1.885   203.87
1797.00    1.882   203.32
1798.00    1.880   202.76
1799.00    1.877   202.20
1800.00    1.874   201.65
1801.00    1.871   201.08
1802.00    1.869   200.52
1803.00    1.866   199.96
1804.00    1.864   199.39
1805.00    1.861   198.83
1806.00    1.859   198.26
1807.00    1.857   197.69
1808.00    1.854   197.12
1809.00    1.852   196.54
1810.00    1.850   195.97
1811.00    1.848   195.39
1812.00    1.846   194.82
1813.00    1.845   194.24
1814.00    1.843   193.66
1815.00    1.841   193.08
1816.00    1.840   192.50
1817.00    1.838   191.92
1818.00    1.837   191.34
1819.00    1.835   190.75
1820.00    1.834   190.17
1821.00    1.833   189.58
1822.00    1.832   189.00
1823.00    1.831   188.41
1824.00    1.830   187.83
1825.00    1.829   187.24
1826.00    1.828   186.65
1827.00    1.827   186.06
1828.00    1.827   185.47
1829.00    1.826   184.88
1830.00    1.826   184.29
1831.00    1.825   183.70
1832.00    1.825   183.11
1833.00    1.825   182.52
1834.00    1.825   181.93
1835.00    1.824   181.34
1836.00    1.824   180.75
1837.00    1.824   180.16
1838.00    1.824   179.57
1839.00    1.825   178.98
1840.00    1.825   178.39
1841.00    1.825   177.80
1842.00    1.826   177.21
1843.00    1.826   176.62
1844.00    1.827   176.03
1845.00    1.827   175.44
1846.00    1.828   174.85
1847.00    1.828   174.26
1848.00    1.829   173.67
1849.00    1.830   173.08
1850.00    1.831   172.50
1851.00    1.832   171.91
1852.00    1.833   171.32
1853.00    1.834   170.74
1854.00    1.835   170.16
1855.00    1.836   169.57
1856.00    1.837   168.99
1857.00    1.839   168.41
1858.00    1.840   167.83
1859.00    1.841   167.24
1860.00    1.843   166.67
1861.00    1.844   166.09
1862.00    1.846   165.51
1863.00    1.847   164.93
1864.00    1.849   164.36
1865.00    1.850   163.78
1866.00    1.852   163.21
1867.00    1.854   162.63
1868.00    1.855   162.06
1869.00    1.857   161.49
1870.00    1.859   160.92
1871.00    1.861   160.35
1872.00    1.863   159.79
1873.00    1.864   159.22
1874.00    1.866   158.66
1875.00    1.868   158.09
1876.00    1.870   157.53
1877.00    1.872   156.97
1878.00    1.874   156.41
1879.00    1.876   155.85
1880.00    1.878   155.29
1881.00    1.880   154.73
1882.00    1.882   154.17
1883.00    1.884   153.62
1884.00    1.885   153.07
1885.00    1.887   152.51
1886.00    1.889   151.96
1887.00    1.891   151.41
1888.00    1.893   150.86
1889.00    1.895   150.31
1890.00    1.897   149.77
1891.00    1.899   149.22
1892.00    1.900   148.68
1893.00    1.902   148.13
1894.00    1.904   147.59
1895.00    1.906   147.05
1896.00    1.907   146.51
1897.00    1.909   145.97
1898.00    1.911   145.43
1899.00    1.912   144.89
1900.00    1.914   144.35
1901.00    1.915   143.81
1902.00    1.917   143.28
1903.00    1.918   142.74
1904.00    1.919   142.21
1905.00    1.920   141.68
1906.00    1.922   141.14
1907.00    1.923   140.61
1908.00    1.924   140.08
1909.00    1.925   139.55
1910.00    1.925   139.02
1911.00    1.926   138.49
1912.00    1.927   137.96
1913.00    1.928   137.43
1914.00    1.928   136.90
1915.00    1.928   136.37
1916.00    1.929   135.84
1917.00    1.929   135.31
1918.00    1.929   134.78
1919.00    1.929   134.26
1920.00    1.929   133.73
1921.00    1.929   133.20
1922.00    1.928   132.67
1923.00    1.928   132.14
1924.00    1.927   131.61
1925.00    1.926   131.08
1926.00    1.925   130.55
1927.00    1.924   130.02
1928.00    1.923   129.49
1929.00    1.922   128.96
1930.00    1.920   128.42
1931.00    1.918   127.89
1932.00    1.917   127.35
1933.00    1.915   126.82
1934.00    1.912   126.28
1935.00    1.910   125.74
1936.00    1.907   125.20
1937.00    1.905   124.66
1938.00    1.902   124.12
1939.00    1.899   123.57
1940.00    1.895   123.03
1941.00    1.892   122.48
1942.00    1.888   121.93
1943.00    1.884   121.38
1944.00    1.880   120.82
1945.00    1.876   120.26
1946.00    1.871   119.70
1947.00    1.866   119.14
1948.00    1.861   118.57
1949.00    1.856   118.00
1950.00    1.850   117.43
1951.00    1.844   116.85
1952.00    1.838   116.27
1953.00    1.832   115.69
1954.00    1.825   115.10
1955.00    1.818   114.51
1956.00    1.811   113.91
1957.00    1.804   113.31
1958.00    1.796   112.70
1959.00    1.788   112.09
1960.00    1.780   111.47
1961.00    1.771   110.85
1962.00    1.763   110.22
1963.00    1.754   109.58
1964.00    1.744   108.94
1965.00    1.734   108.29
1966.00    1.724   107.63
1967.00    1.714   106.97
1968.00    1.703   106.29
1969.00    1.693   105.61
1970.00    1.681   104.92
1971.00    1.670   104.22
1972.00    1.658   103.51
1973.00    1.646   102.79
1974.00    1.633   102.06
1975.00    1.620   101.31
1976.00    1.607   100.56
1977.00    1.594    99.79
1978.00    1.580    99.01
1979.00    1.566    98.22
1980.00    1.552    97.41
1981.00    1.537    96.58
1982.00    1.522    95.74
1983.00    1.507    94.88
1984.00    1.491    94.01
1985.00    1.475    93.11
1986.00    1.459    92.20
1987.00    1.443    91.27
1988.00    1.427    90.31
1989.00    1.410    89.33
1990.00    1.393    88.33
1991.00    1.376    87.31
1992.00    1.358    86.25
1993.00    1.341    85.17
1994.00    1.323    84.06
1995.00    1.305    82.93
1996.00    1.287    81.75
1997.00    1.269    80.55
1998.00    1.251    79.31
1999.00    1.233    78.04
2000.00    1.215    76.72
2001.00    1.196    75.37
2002.00    1.178    73.97
2003.00    1.160    72.54
2004.00    1.143    71.05
2005.00    1.125    69.52
2006.00    1.107    67.94
2007.00    1.090    66.32
2008.00    1.073    64.63
2009.00    1.057    62.90
2010.00    1.041    61.11
2011.00    1.025    59.27
2012.00    1.010    57.37
2013.00    0.996    55.41
2014.00    0.982    53.40
2015.00    0.968    51.33
2016.00    0.956    49.21
2017.00    0.944    47.03
2018.00    0.934    44.80
2019.00    0.924    42.52
2020.00    0.915    40.19
2021.00    0.907    37.82
2022.00    0.900    35.41
2023.00    0.894    32.96
2024.00    0.890    30.49
2025.00    0.886    28.00
2026.00    0.884    25.49
2027.00    0.883    22.97
2028.00    0.884    20.45
2029.00    0.885    17.94
2030.00    0.888    15.43
2031.00    0.892    12.95
2032.00    0.897    10.49
2033.00    0.903     8.06
2034.00    0.911     5.67
2035.00    0.919     3.32
2036.00    0.929     1.02
2037.00    0.939   358.76
2038.00    0.951   356.56
2039.00    0.963   354.41
2040.00    0.976   352.32
2041.00    0.990   350.28
2042.00    1.005   348.31
2043.00    1.021   346.39
2044.00    1.037   344.53
2045.00    1.053   342.73
2046.00    1.071   340.99
2047.00    1.088   339.30
2048.00    1.106   337.66
2049.00    1.125   336.08
2050.00    1.144   334.56
2051.00    1.163   333.08
2052.00    1.183   331.65
2053.00    1.202   330.27
2054.00    1.222   328.93
2055.00    1.242   327.63
2056.00    1.263   326.38
2057.00    1.283   325.16
2058.00    1.303   323.99
2059.00    1.324   322.85
2060.00    1.344   321.74
2061.00    1.365   320.67
2062.00    1.385   319.63
2063.00    1.406   318.62
2064.00    1.426   317.64
2065.00    1.446   316.68
2066.00    1.467   315.76
2067.00    1.487   314.86
2068.00    1.507   313.98
2069.00    1.527   313.12
2070.00    1.547   312.29
2071.00    1.566   311.48
2072.00    1.586   310.69
2073.00    1.605   309.91
2074.00    1.624   309.16
2075.00    1.643   308.42
2076.00    1.662   307.70
2077.00    1.681   307.00
2078.00    1.699   306.31
2079.00    1.718   305.64
2080.00    1.736   304.98
2081.00    1.754   304.33
2082.00    1.771   303.70
2083.00    1.789   303.08
2084.00    1.806   302.47
2085.00    1.823   301.87
2086.00    1.840   301.29
2087.00    1.856   300.71
2088.00    1.873   300.14
2089.00    1.889   299.59
2090.00    1.905   299.04
2091.00    1.920   298.50
2092.00    1.936   297.98
2093.00    1.951   297.45
2094.00    1.966   296.94
2095.00    1.980   296.44
2096.00    1.995   295.94
2097.00    2.009   295.45
2098.00    2.023   294.96
2099.00    2.037   294.49
2100.00    2.051   294.02
2101.00    2.064   293.55
2102.00    2.077   293.09
2103.00    2.090   292.64
2104.00    2.102   292.19
2105.00    2.115   291.75
2106.00    2.127   291.31
2107.00    2.139   290.88
2108.00    2.151   290.45
2109.00    2.162   290.03
2110.00    2.173   289.61
2111.00    2.185   289.20
2112.00    2.195   288.79
2113.00    2.206   288.38
2114.00    2.216   287.98
2115.00    2.227   287.58
2116.00    2.237   287.19
2117.00    2.246   286.79
2118.00    2.256   286.41
2119.00    2.265   286.02
2120.00    2.274   285.64
2121.00    2.283   285.26
2122.00    2.292   284.88
2123.00    2.300   284.51
2124.00    2.309   284.14
2125.00    2.317   283.77
2126.00    2.325   283.41
2127.00    2.332   283.05
2128.00    2.340   282.69
2129.00    2.347   282.33
2130.00    2.354   281.97
2131.00    2.361   281.62
2132.00    2.368   281.27
2133.00    2.375   280.92
2134.00    2.381   280.57
2135.00    2.387   280.22
2136.00    2.393   279.88
2137.00    2.399   279.54
2138.00    2.405   279.20
2139.00    2.410   278.86
2140.00    2.416   278.52
2141.00    2.421   278.18
2142.00    2.426   277.85
2143.00    2.430   277.51
2144.00    2.435   277.18
2145.00    2.440   276.85
2146.00    2.444   276.52
2147.00    2.448   276.19
2148.00    2.452   275.86
2149.00    2.456   275.54
2150.00    2.459   275.21
2151.00    2.463   274.89
2152.00    2.466   274.56
2153.00    2.469   274.24
2154.00    2.472   273.92
2155.00    2.475   273.60
2156.00    2.478   273.28
2157.00    2.481   272.96
2158.00    2.483   272.64
2159.00    2.485   272.32
2160.00    2.488   272.00
2161.00    2.490   271.68
2162.00    2.491   271.37
2163.00    2.493   271.05
2164.00    2.495   270.73
2165.00    2.496   270.42
2166.00    2.498   270.10
2167.00    2.499   269.79
2168.00    2.500   269.47
2169.00    2.501   269.16
2170.00    2.502   268.84
2171.00    2.502   268.53
2172.00    2.503   268.22
2173.00    2.503   267.90
2174.00    2.504   267.59
2175.00    2.504   267.27
2176.00    2.504   266.96
2177.00    2.504   266.65
2178.00    2.504   266.33
2179.00    2.503   266.02
2180.00    2.503   265.71
2181.00    2.503   265.39
2182.00    2.502   265.08
2183.00    2.501   264.76
2184.00    2.500   264.45
2185.00    2.500   264.13
2186.00    2.499   263.82
2187.00    2.497   263.50
2188.00    2.496   263.19
2189.00    2.495   262.87
2190.00    2.493   262.56
2191.00    2.492   262.24
2192.00    2.490   261.92
2193.00    2.488   261.61
2194.00    2.487   261.29
2195.00    2.485   260.97
2196.00    2.483   260.65
2197.00    2.481   260.33
2198.00    2.478   260.01
2199.00    2.476   259.69
2200.00    2.474   259.37
2201.00    2.471   259.05
2202.00    2.469   258.73
2203.00    2.466   258.40
2204.00    2.464   258.08
2205.00    2.461   257.75
2206.00    2.458   257.43
2207.00    2.455   257.10
2208.00    2.452   256.78
2209.00    2.449   256.45
2210.00    2.446   256.12
2211.00    2.443   255.79
2212.00    2.439   255.46
2213.00    2.436   255.13
2214.00    2.433   254.80
2215.00    2.429   254.47
2216.00    2.425   254.13
2217.00    2.422   253.80
2218.00    2.418   253.46
2219.00    2.414   253.13
2220.00    2.411   252.79
2221.00    2.407   252.45
2222.00    2.403   252.11
2223.00    2.399   251.77
2224.00    2.395   251.42
2225.00    2.391   251.08
2226.00    2.386   250.74
2227.00    2.382   250.39
2228.00    2.378   250.04
2229.00    2.374   249.69
2230.00    2.369   249.34
2231.00    2.365   248.99
2232.00    2.360   248.64
2233.00    2.356   248.29
2234.00    2.351   247.93
2235.00    2.347   247.58
2236.00    2.342   247.22
2237.00    2.337   246.86
2238.00    2.333   246.50
2239.00    2.328   246.14
2240.00    2.323   245.77
2241.00    2.318   245.41
2242.00    2.313   245.04
2243.00    2.308   244.67
2244.00    2.304   244.30
2245.00    2.299   243.93
2246.00    2.294   243.56
2247.00    2.289   243.18
2248.00    2.283   242.81
2249.00    2.278   242.43
2250.00    2.273   242.05
2251.00    2.268   241.67
2252.00    2.263   241.29
2253.00    2.258   240.90
2254.00    2.253   240.51
2255.00    2.247   240.13
2256.00    2.242   239.73
2257.00    2.237   239.34
2258.00    2.232   238.95
2259.00    2.226   238.55
2260.00    2.221   238.16
2261.00    2.216   237.76
2262.00    2.211   237.35
2263.00    2.205   236.95
2264.00    2.200   236.55
2265.00    2.195   236.14
2266.00    2.189   235.73
2267.00    2.184   235.32
2268.00    2.178   234.90
2269.00    2.173   234.49
2270.00    2.168   234.07
2271.00    2.162   233.65
2272.00    2.157   233.23
2273.00    2.152   232.81
2274.00    2.146   232.38
2275.00    2.141   231.95
2276.00    2.136   231.52
2277.00    2.130   231.09
2278.00    2.125   230.66
2279.00    2.120   230.22
2280.00    2.114   229.78
2281.00    2.109   229.34
2282.00    2.104   228.90
2283.00    2.099   228.45
2284.00    2.093   228.00
2285.00    2.088   227.55
2286.00    2.083   227.10
2287.00    2.078   226.65
2288.00    2.073   226.19
2289.00    2.068   225.73
2290.00    2.063   225.27
2291.00    2.057   224.81
2292.00    2.052   224.34






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 17:12:08



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