Double Star Calculator - Orbit

Orbital Elements for HO98AB
WDS: HO98AB WDS ID/Discoverer
P: 628.000 Orbital period (years)
a: 0.433 Semi-major axis (arcseconds)
i: 123.0 Inclination (degrees)
Ω: 83.1 Longitude of ascending node (degrees)
T: 2022.210 Epoch of periastron passage (year)
e: 0.497 Eccentricity
ω: 54.2 Longitude of periastron (degrees)
Start-Year: 1711.0 Year
End-Year: 2339.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for HO98AB
Position: 190816.19+270539.3 Epoch-2000 right ascension and declination
WDS-ID: 19083+2706 WDS designation
Discoverer Code: HO98AB Discover designation and components
ADS number: 12079 Aitken Double Star catalog
HD number: 178617 HD catalog number
Hipparcos number: 93994 Hipparcos catalog number
V1: 8.28 Magnitude of the primary
V2: 8.30 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2007 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: Lin2012a Reference

Double Star Orbit for HO98AB



WDS 6th Orbit including measures of HO98AB

-- 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 HO98AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.146    36.67
--------------------------
1711.00    0.472   225.41
1712.00    0.471   225.18
1713.00    0.470   224.95
1714.00    0.468   224.72
1715.00    0.467   224.49
1716.00    0.466   224.25
1717.00    0.465   224.02
1718.00    0.464   223.78
1719.00    0.462   223.55
1720.00    0.461   223.31
1721.00    0.460   223.07
1722.00    0.459   222.83
1723.00    0.458   222.59
1724.00    0.456   222.34
1725.00    0.455   222.10
1726.00    0.454   221.85
1727.00    0.453   221.61
1728.00    0.451   221.36
1729.00    0.450   221.11
1730.00    0.449   220.86
1731.00    0.447   220.60
1732.00    0.446   220.35
1733.00    0.445   220.09
1734.00    0.444   219.84
1735.00    0.442   219.58
1736.00    0.441   219.32
1737.00    0.440   219.05
1738.00    0.438   218.79
1739.00    0.437   218.53
1740.00    0.436   218.26
1741.00    0.435   217.99
1742.00    0.433   217.72
1743.00    0.432   217.45
1744.00    0.431   217.18
1745.00    0.429   216.90
1746.00    0.428   216.62
1747.00    0.427   216.35
1748.00    0.425   216.07
1749.00    0.424   215.78
1750.00    0.423   215.50
1751.00    0.421   215.22
1752.00    0.420   214.93
1753.00    0.418   214.64
1754.00    0.417   214.35
1755.00    0.416   214.05
1756.00    0.414   213.76
1757.00    0.413   213.46
1758.00    0.412   213.16
1759.00    0.410   212.86
1760.00    0.409   212.56
1761.00    0.408   212.26
1762.00    0.406   211.95
1763.00    0.405   211.64
1764.00    0.403   211.33
1765.00    0.402   211.02
1766.00    0.401   210.70
1767.00    0.399   210.38
1768.00    0.398   210.06
1769.00    0.397   209.74
1770.00    0.395   209.42
1771.00    0.394   209.09
1772.00    0.392   208.76
1773.00    0.391   208.43
1774.00    0.390   208.10
1775.00    0.388   207.76
1776.00    0.387   207.42
1777.00    0.386   207.08
1778.00    0.384   206.74
1779.00    0.383   206.40
1780.00    0.381   206.05
1781.00    0.380   205.70
1782.00    0.379   205.34
1783.00    0.377   204.99
1784.00    0.376   204.63
1785.00    0.375   204.27
1786.00    0.373   203.91
1787.00    0.372   203.54
1788.00    0.371   203.17
1789.00    0.369   202.80
1790.00    0.368   202.43
1791.00    0.367   202.05
1792.00    0.365   201.67
1793.00    0.364   201.29
1794.00    0.362   200.90
1795.00    0.361   200.52
1796.00    0.360   200.13
1797.00    0.358   199.73
1798.00    0.357   199.33
1799.00    0.356   198.93
1800.00    0.355   198.53
1801.00    0.353   198.13
1802.00    0.352   197.72
1803.00    0.351   197.31
1804.00    0.349   196.89
1805.00    0.348   196.47
1806.00    0.347   196.05
1807.00    0.346   195.63
1808.00    0.344   195.20
1809.00    0.343   194.77
1810.00    0.342   194.34
1811.00    0.340   193.90
1812.00    0.339   193.46
1813.00    0.338   193.02
1814.00    0.337   192.57
1815.00    0.336   192.12
1816.00    0.334   191.67
1817.00    0.333   191.21
1818.00    0.332   190.76
1819.00    0.331   190.29
1820.00    0.330   189.83
1821.00    0.328   189.36
1822.00    0.327   188.88
1823.00    0.326   188.41
1824.00    0.325   187.93
1825.00    0.324   187.45
1826.00    0.323   186.96
1827.00    0.322   186.47
1828.00    0.320   185.98
1829.00    0.319   185.48
1830.00    0.318   184.98
1831.00    0.317   184.48
1832.00    0.316   183.97
1833.00    0.315   183.46
1834.00    0.314   182.95
1835.00    0.313   182.43
1836.00    0.312   181.91
1837.00    0.311   181.39
1838.00    0.310   180.86
1839.00    0.309   180.33
1840.00    0.308   179.80
1841.00    0.307   179.26
1842.00    0.306   178.72
1843.00    0.305   178.18
1844.00    0.304   177.63
1845.00    0.303   177.08
1846.00    0.303   176.53
1847.00    0.302   175.97
1848.00    0.301   175.41
1849.00    0.300   174.85
1850.00    0.299   174.28
1851.00    0.298   173.71
1852.00    0.298   173.14
1853.00    0.297   172.57
1854.00    0.296   171.99
1855.00    0.295   171.41
1856.00    0.295   170.82
1857.00    0.294   170.24
1858.00    0.293   169.65
1859.00    0.292   169.05
1860.00    0.292   168.46
1861.00    0.291   167.86
1862.00    0.290   167.26
1863.00    0.290   166.66
1864.00    0.289   166.05
1865.00    0.289   165.44
1866.00    0.288   164.83
1867.00    0.287   164.22
1868.00    0.287   163.60
1869.00    0.286   162.98
1870.00    0.286   162.36
1871.00    0.285   161.74
1872.00    0.285   161.11
1873.00    0.284   160.49
1874.00    0.284   159.86
1875.00    0.284   159.23
1876.00    0.283   158.59
1877.00    0.283   157.96
1878.00    0.282   157.32
1879.00    0.282   156.69
1880.00    0.282   156.05
1881.00    0.281   155.41
1882.00    0.281   154.76
1883.00    0.281   154.12
1884.00    0.281   153.48
1885.00    0.280   152.83
1886.00    0.280   152.18
1887.00    0.280   151.53
1888.00    0.280   150.89
1889.00    0.279   150.24
1890.00    0.279   149.58
1891.00    0.279   148.93
1892.00    0.279   148.28
1893.00    0.279   147.63
1894.00    0.279   146.97
1895.00    0.279   146.32
1896.00    0.279   145.66
1897.00    0.278   145.01
1898.00    0.278   144.35
1899.00    0.278   143.70
1900.00    0.278   143.04
1901.00    0.278   142.39
1902.00    0.278   141.73
1903.00    0.278   141.08
1904.00    0.278   140.42
1905.00    0.278   139.77
1906.00    0.279   139.11
1907.00    0.279   138.46
1908.00    0.279   137.80
1909.00    0.279   137.15
1910.00    0.279   136.50
1911.00    0.279   135.84
1912.00    0.279   135.19
1913.00    0.279   134.54
1914.00    0.279   133.89
1915.00    0.280   133.24
1916.00    0.280   132.59
1917.00    0.280   131.94
1918.00    0.280   131.29
1919.00    0.280   130.64
1920.00    0.280   130.00
1921.00    0.281   129.35
1922.00    0.281   128.71
1923.00    0.281   128.06
1924.00    0.281   127.42
1925.00    0.281   126.78
1926.00    0.282   126.13
1927.00    0.282   125.49
1928.00    0.282   124.85
1929.00    0.282   124.22
1930.00    0.282   123.58
1931.00    0.283   122.94
1932.00    0.283   122.31
1933.00    0.283   121.67
1934.00    0.283   121.04
1935.00    0.283   120.41
1936.00    0.284   119.77
1937.00    0.284   119.14
1938.00    0.284   118.51
1939.00    0.284   117.88
1940.00    0.284   117.25
1941.00    0.284   116.62
1942.00    0.285   116.00
1943.00    0.285   115.37
1944.00    0.285   114.74
1945.00    0.285   114.12
1946.00    0.285   113.49
1947.00    0.285   112.87
1948.00    0.285   112.24
1949.00    0.285   111.62
1950.00    0.285   110.99
1951.00    0.285   110.37
1952.00    0.285   109.74
1953.00    0.285   109.12
1954.00    0.285   108.50
1955.00    0.285   107.87
1956.00    0.285   107.24
1957.00    0.285   106.62
1958.00    0.285   105.99
1959.00    0.284   105.36
1960.00    0.284   104.74
1961.00    0.284   104.11
1962.00    0.284   103.48
1963.00    0.283   102.84
1964.00    0.283   102.21
1965.00    0.283   101.57
1966.00    0.282   100.94
1967.00    0.282   100.30
1968.00    0.281    99.66
1969.00    0.281    99.01
1970.00    0.280    98.37
1971.00    0.279    97.72
1972.00    0.279    97.06
1973.00    0.278    96.41
1974.00    0.277    95.75
1975.00    0.276    95.08
1976.00    0.275    94.42
1977.00    0.274    93.74
1978.00    0.273    93.06
1979.00    0.272    92.38
1980.00    0.271    91.69
1981.00    0.270    91.00
1982.00    0.269    90.30
1983.00    0.267    89.59
1984.00    0.266    88.87
1985.00    0.264    88.15
1986.00    0.263    87.42
1987.00    0.261    86.68
1988.00    0.259    85.93
1989.00    0.258    85.17
1990.00    0.256    84.40
1991.00    0.254    83.62
1992.00    0.252    82.82
1993.00    0.250    82.02
1994.00    0.248    81.20
1995.00    0.245    80.36
1996.00    0.243    79.51
1997.00    0.241    78.64
1998.00    0.238    77.76
1999.00    0.236    76.85
2000.00    0.233    75.93
2001.00    0.230    74.98
2002.00    0.227    74.01
2003.00    0.225    73.02
2004.00    0.222    72.00
2005.00    0.219    70.95
2006.00    0.216    69.87
2007.00    0.212    68.76
2008.00    0.209    67.62
2009.00    0.206    66.44
2010.00    0.203    65.22
2011.00    0.199    63.96
2012.00    0.196    62.65
2013.00    0.192    61.30
2014.00    0.189    59.90
2015.00    0.185    58.45
2016.00    0.182    56.94
2017.00    0.178    55.36
2018.00    0.174    53.73
2019.00    0.171    52.02
2020.00    0.167    50.25
2021.00    0.164    48.39
2022.00    0.160    46.46
2023.00    0.157    44.44
2024.00    0.154    42.33
2025.00    0.150    40.14
2026.00    0.147    37.85
2027.00    0.144    35.46
2028.00    0.142    32.98
2029.00    0.139    30.39
2030.00    0.137    27.72
2031.00    0.134    24.94
2032.00    0.132    22.08
2033.00    0.130    19.13
2034.00    0.129    16.11
2035.00    0.128    13.02
2036.00    0.127     9.88
2037.00    0.126     6.70
2038.00    0.126     3.49
2039.00    0.126     0.26
2040.00    0.126   357.05
2041.00    0.126   353.85
2042.00    0.127   350.69
2043.00    0.128   347.58
2044.00    0.130   344.54
2045.00    0.132   341.56
2046.00    0.134   338.68
2047.00    0.136   335.88
2048.00    0.138   333.18
2049.00    0.141   330.57
2050.00    0.144   328.07
2051.00    0.147   325.67
2052.00    0.150   323.38
2053.00    0.154   321.18
2054.00    0.157   319.08
2055.00    0.161   317.07
2056.00    0.165   315.16
2057.00    0.169   313.33
2058.00    0.173   311.59
2059.00    0.177   309.93
2060.00    0.181   308.34
2061.00    0.185   306.82
2062.00    0.189   305.37
2063.00    0.194   303.98
2064.00    0.198   302.66
2065.00    0.202   301.39
2066.00    0.207   300.17
2067.00    0.211   299.01
2068.00    0.215   297.89
2069.00    0.220   296.81
2070.00    0.224   295.78
2071.00    0.228   294.79
2072.00    0.233   293.83
2073.00    0.237   292.91
2074.00    0.241   292.02
2075.00    0.246   291.17
2076.00    0.250   290.34
2077.00    0.254   289.54
2078.00    0.259   288.77
2079.00    0.263   288.02
2080.00    0.267   287.30
2081.00    0.271   286.60
2082.00    0.275   285.92
2083.00    0.280   285.26
2084.00    0.284   284.62
2085.00    0.288   284.00
2086.00    0.292   283.39
2087.00    0.296   282.80
2088.00    0.300   282.23
2089.00    0.304   281.67
2090.00    0.307   281.13
2091.00    0.311   280.60
2092.00    0.315   280.08
2093.00    0.319   279.57
2094.00    0.323   279.08
2095.00    0.326   278.60
2096.00    0.330   278.13
2097.00    0.334   277.67
2098.00    0.337   277.21
2099.00    0.341   276.77
2100.00    0.344   276.34
2101.00    0.348   275.91
2102.00    0.351   275.50
2103.00    0.355   275.09
2104.00    0.358   274.69
2105.00    0.361   274.30
2106.00    0.365   273.91
2107.00    0.368   273.53
2108.00    0.371   273.16
2109.00    0.374   272.80
2110.00    0.377   272.44
2111.00    0.380   272.08
2112.00    0.384   271.74
2113.00    0.387   271.39
2114.00    0.390   271.06
2115.00    0.393   270.72
2116.00    0.395   270.40
2117.00    0.398   270.07
2118.00    0.401   269.76
2119.00    0.404   269.44
2120.00    0.407   269.13
2121.00    0.409   268.83
2122.00    0.412   268.53
2123.00    0.415   268.23
2124.00    0.417   267.94
2125.00    0.420   267.65
2126.00    0.423   267.36
2127.00    0.425   267.08
2128.00    0.428   266.80
2129.00    0.430   266.52
2130.00    0.432   266.25
2131.00    0.435   265.98
2132.00    0.437   265.71
2133.00    0.440   265.45
2134.00    0.442   265.19
2135.00    0.444   264.93
2136.00    0.446   264.67
2137.00    0.448   264.42
2138.00    0.451   264.17
2139.00    0.453   263.92
2140.00    0.455   263.67
2141.00    0.457   263.43
2142.00    0.459   263.18
2143.00    0.461   262.94
2144.00    0.463   262.71
2145.00    0.465   262.47
2146.00    0.467   262.24
2147.00    0.469   262.00
2148.00    0.471   261.77
2149.00    0.472   261.54
2150.00    0.474   261.32
2151.00    0.476   261.09
2152.00    0.478   260.87
2153.00    0.479   260.65
2154.00    0.481   260.43
2155.00    0.483   260.21
2156.00    0.484   259.99
2157.00    0.486   259.78
2158.00    0.488   259.56
2159.00    0.489   259.35
2160.00    0.491   259.14
2161.00    0.492   258.93
2162.00    0.494   258.72
2163.00    0.495   258.51
2164.00    0.497   258.30
2165.00    0.498   258.10
2166.00    0.499   257.89
2167.00    0.501   257.69
2168.00    0.502   257.49
2169.00    0.503   257.29
2170.00    0.505   257.09
2171.00    0.506   256.89
2172.00    0.507   256.69
2173.00    0.508   256.49
2174.00    0.509   256.30
2175.00    0.510   256.10
2176.00    0.512   255.91
2177.00    0.513   255.71
2178.00    0.514   255.52
2179.00    0.515   255.33
2180.00    0.516   255.14
2181.00    0.517   254.95
2182.00    0.518   254.76
2183.00    0.519   254.57
2184.00    0.520   254.38
2185.00    0.521   254.19
2186.00    0.522   254.00
2187.00    0.522   253.82
2188.00    0.523   253.63
2189.00    0.524   253.45
2190.00    0.525   253.26
2191.00    0.526   253.08
2192.00    0.526   252.89
2193.00    0.527   252.71
2194.00    0.528   252.53
2195.00    0.529   252.35
2196.00    0.529   252.17
2197.00    0.530   251.98
2198.00    0.531   251.80
2199.00    0.531   251.62
2200.00    0.532   251.44
2201.00    0.532   251.26
2202.00    0.533   251.09
2203.00    0.534   250.91
2204.00    0.534   250.73
2205.00    0.535   250.55
2206.00    0.535   250.37
2207.00    0.536   250.20
2208.00    0.536   250.02
2209.00    0.536   249.84
2210.00    0.537   249.67
2211.00    0.537   249.49
2212.00    0.538   249.31
2213.00    0.538   249.14
2214.00    0.538   248.96
2215.00    0.539   248.79
2216.00    0.539   248.61
2217.00    0.539   248.44
2218.00    0.539   248.26
2219.00    0.540   248.09
2220.00    0.540   247.91
2221.00    0.540   247.74
2222.00    0.540   247.57
2223.00    0.541   247.39
2224.00    0.541   247.22
2225.00    0.541   247.04
2226.00    0.541   246.87
2227.00    0.541   246.70
2228.00    0.541   246.52
2229.00    0.541   246.35
2230.00    0.541   246.18
2231.00    0.541   246.00
2232.00    0.541   245.83
2233.00    0.541   245.66
2234.00    0.541   245.48
2235.00    0.541   245.31
2236.00    0.541   245.14
2237.00    0.541   244.96
2238.00    0.541   244.79
2239.00    0.541   244.62
2240.00    0.541   244.44
2241.00    0.541   244.27
2242.00    0.541   244.10
2243.00    0.541   243.92
2244.00    0.541   243.75
2245.00    0.540   243.58
2246.00    0.540   243.40
2247.00    0.540   243.23
2248.00    0.540   243.05
2249.00    0.540   242.88
2250.00    0.539   242.70
2251.00    0.539   242.53
2252.00    0.539   242.36
2253.00    0.539   242.18
2254.00    0.538   242.00
2255.00    0.538   241.83
2256.00    0.538   241.65
2257.00    0.537   241.48
2258.00    0.537   241.30
2259.00    0.537   241.13
2260.00    0.536   240.95
2261.00    0.536   240.77
2262.00    0.535   240.60
2263.00    0.535   240.42
2264.00    0.535   240.24
2265.00    0.534   240.06
2266.00    0.534   239.88
2267.00    0.533   239.71
2268.00    0.533   239.53
2269.00    0.532   239.35
2270.00    0.532   239.17
2271.00    0.531   238.99
2272.00    0.531   238.81
2273.00    0.530   238.63
2274.00    0.530   238.45
2275.00    0.529   238.27
2276.00    0.529   238.08
2277.00    0.528   237.90
2278.00    0.527   237.72
2279.00    0.527   237.54
2280.00    0.526   237.35
2281.00    0.525   237.17
2282.00    0.525   236.99
2283.00    0.524   236.80
2284.00    0.524   236.62
2285.00    0.523   236.43
2286.00    0.522   236.24
2287.00    0.521   236.06
2288.00    0.521   235.87
2289.00    0.520   235.68
2290.00    0.519   235.50
2291.00    0.519   235.31
2292.00    0.518   235.12
2293.00    0.517   234.93
2294.00    0.516   234.74
2295.00    0.515   234.55
2296.00    0.515   234.36
2297.00    0.514   234.16
2298.00    0.513   233.97
2299.00    0.512   233.78
2300.00    0.511   233.58
2301.00    0.511   233.39
2302.00    0.510   233.19
2303.00    0.509   233.00
2304.00    0.508   232.80
2305.00    0.507   232.60
2306.00    0.506   232.41
2307.00    0.505   232.21
2308.00    0.504   232.01
2309.00    0.503   231.81
2310.00    0.502   231.61
2311.00    0.502   231.41
2312.00    0.501   231.20
2313.00    0.500   231.00
2314.00    0.499   230.80
2315.00    0.498   230.59
2316.00    0.497   230.39
2317.00    0.496   230.18
2318.00    0.495   229.97
2319.00    0.494   229.76
2320.00    0.493   229.56
2321.00    0.492   229.35
2322.00    0.491   229.14
2323.00    0.490   228.92
2324.00    0.489   228.71
2325.00    0.488   228.50
2326.00    0.486   228.28
2327.00    0.485   228.07
2328.00    0.484   227.85
2329.00    0.483   227.64
2330.00    0.482   227.42
2331.00    0.481   227.20
2332.00    0.480   226.98
2333.00    0.479   226.76
2334.00    0.478   226.54
2335.00    0.477   226.31
2336.00    0.475   226.09
2337.00    0.474   225.86
2338.00    0.473   225.64






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 18:00:38



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