Double Star Calculator - Orbit

Orbital Elements for STF2597AB
WDS: STF2597AB WDS ID/Discoverer
P: 425.000 Orbital period (years)
a: 1.085 Semi-major axis (arcseconds)
i: 103.05 Inclination (degrees)
Ω: 264.03 Longitude of ascending node (degrees)
T: 1974.280 Epoch of periastron passage (year)
e: 0.9414 Eccentricity
ω: 327.9 Longitude of periastron (degrees)
Start-Year: 1812.5 Year
End-Year: 2237.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2597AB
Position: 195519.49-064404.7 Epoch-2000 right ascension and declination
WDS-ID: 19553-0644 WDS designation
Discoverer Code: STF2597AB Discover designation and components
ADS number: 13104 Aitken Double Star catalog
HD number: 188405 HD catalog number
Hipparcos number: 98038 Hipparcos catalog number
V1: 6.94 Magnitude of the primary
V2: 7.98 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 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: Hrt1996a Reference

Double Star Orbit for STF2597AB



WDS 6th Orbit including measures of STF2597AB

-- 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 STF2597AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.823    98.77
--------------------------
1812.50    1.802    90.92
1813.50    1.801    90.90
1814.50    1.799    90.87
1815.50    1.798    90.85
1816.50    1.796    90.83
1817.50    1.794    90.80
1818.50    1.792    90.78
1819.50    1.791    90.76
1820.50    1.789    90.73
1821.50    1.787    90.71
1822.50    1.785    90.69
1823.50    1.783    90.66
1824.50    1.780    90.64
1825.50    1.778    90.61
1826.50    1.776    90.59
1827.50    1.774    90.57
1828.50    1.771    90.54
1829.50    1.769    90.52
1830.50    1.766    90.49
1831.50    1.764    90.47
1832.50    1.761    90.44
1833.50    1.758    90.42
1834.50    1.755    90.39
1835.50    1.753    90.37
1836.50    1.750    90.35
1837.50    1.747    90.32
1838.50    1.744    90.30
1839.50    1.740    90.27
1840.50    1.737    90.25
1841.50    1.734    90.22
1842.50    1.731    90.19
1843.50    1.727    90.17
1844.50    1.724    90.14
1845.50    1.720    90.12
1846.50    1.717    90.09
1847.50    1.713    90.07
1848.50    1.709    90.04
1849.50    1.705    90.01
1850.50    1.701    89.99
1851.50    1.697    89.96
1852.50    1.693    89.94
1853.50    1.689    89.91
1854.50    1.685    89.88
1855.50    1.681    89.86
1856.50    1.676    89.83
1857.50    1.672    89.80
1858.50    1.668    89.77
1859.50    1.663    89.75
1860.50    1.658    89.72
1861.50    1.654    89.69
1862.50    1.649    89.66
1863.50    1.644    89.64
1864.50    1.639    89.61
1865.50    1.634    89.58
1866.50    1.629    89.55
1867.50    1.623    89.52
1868.50    1.618    89.49
1869.50    1.613    89.46
1870.50    1.607    89.44
1871.50    1.602    89.41
1872.50    1.596    89.38
1873.50    1.590    89.35
1874.50    1.585    89.32
1875.50    1.579    89.29
1876.50    1.573    89.25
1877.50    1.567    89.22
1878.50    1.560    89.19
1879.50    1.554    89.16
1880.50    1.548    89.13
1881.50    1.541    89.10
1882.50    1.535    89.07
1883.50    1.528    89.03
1884.50    1.521    89.00
1885.50    1.514    88.97
1886.50    1.508    88.93
1887.50    1.500    88.90
1888.50    1.493    88.87
1889.50    1.486    88.83
1890.50    1.479    88.80
1891.50    1.471    88.76
1892.50    1.464    88.73
1893.50    1.456    88.69
1894.50    1.448    88.66
1895.50    1.440    88.62
1896.50    1.432    88.58
1897.50    1.424    88.55
1898.50    1.416    88.51
1899.50    1.408    88.47
1900.50    1.399    88.43
1901.50    1.390    88.39
1902.50    1.382    88.35
1903.50    1.373    88.31
1904.50    1.364    88.27
1905.50    1.355    88.23
1906.50    1.346    88.19
1907.50    1.336    88.15
1908.50    1.327    88.10
1909.50    1.317    88.06
1910.50    1.307    88.02
1911.50    1.297    87.97
1912.50    1.287    87.93
1913.50    1.277    87.88
1914.50    1.267    87.83
1915.50    1.256    87.79
1916.50    1.245    87.74
1917.50    1.235    87.69
1918.50    1.224    87.64
1919.50    1.212    87.59
1920.50    1.201    87.53
1921.50    1.190    87.48
1922.50    1.178    87.43
1923.50    1.166    87.37
1924.50    1.154    87.32
1925.50    1.142    87.26
1926.50    1.129    87.20
1927.50    1.117    87.14
1928.50    1.104    87.08
1929.50    1.091    87.01
1930.50    1.077    86.95
1931.50    1.064    86.88
1932.50    1.050    86.82
1933.50    1.036    86.75
1934.50    1.022    86.67
1935.50    1.007    86.60
1936.50    0.993    86.52
1937.50    0.978    86.45
1938.50    0.963    86.37
1939.50    0.947    86.28
1940.50    0.931    86.20
1941.50    0.915    86.11
1942.50    0.898    86.01
1943.50    0.882    85.92
1944.50    0.865    85.82
1945.50    0.847    85.71
1946.50    0.829    85.61
1947.50    0.811    85.49
1948.50    0.792    85.38
1949.50    0.773    85.25
1950.50    0.753    85.12
1951.50    0.733    84.98
1952.50    0.713    84.84
1953.50    0.692    84.68
1954.50    0.670    84.52
1955.50    0.648    84.35
1956.50    0.625    84.16
1957.50    0.601    83.96
1958.50    0.576    83.74
1959.50    0.551    83.50
1960.50    0.525    83.23
1961.50    0.498    82.94
1962.50    0.469    82.62
1963.50    0.440    82.25
1964.50    0.409    81.83
1965.50    0.377    81.34
1966.50    0.342    80.75
1967.50    0.306    80.02
1968.50    0.267    79.09
1969.50    0.225    77.83
1970.50    0.178    75.94
1971.50    0.127    72.60
1972.50    0.069    64.02
1973.50    0.019   342.00
1974.50    0.063   267.27
1975.50    0.074   252.56
1976.50    0.065   237.07
1977.50    0.055   215.42
1978.50    0.053   188.18
1979.50    0.061   163.67
1980.50    0.076   146.89
1981.50    0.094   136.18
1982.50    0.114   129.09
1983.50    0.135   124.15
1984.50    0.155   120.51
1985.50    0.176   117.73
1986.50    0.196   115.54
1987.50    0.217   113.75
1988.50    0.236   112.27
1989.50    0.256   111.01
1990.50    0.275   109.93
1991.50    0.294   109.00
1992.50    0.313   108.17
1993.50    0.331   107.44
1994.50    0.350   106.78
1995.50    0.367   106.19
1996.50    0.385   105.66
1997.50    0.402   105.17
1998.50    0.420   104.72
1999.50    0.437   104.30
2000.50    0.453   103.92
2001.50    0.470   103.56
2002.50    0.486   103.23
2003.50    0.502   102.92
2004.50    0.518   102.63
2005.50    0.533   102.35
2006.50    0.549   102.09
2007.50    0.564   101.85
2008.50    0.579   101.61
2009.50    0.594   101.39
2010.50    0.608   101.18
2011.50    0.623   100.98
2012.50    0.637   100.79
2013.50    0.651   100.61
2014.50    0.665   100.43
2015.50    0.679   100.26
2016.50    0.693   100.10
2017.50    0.707    99.95
2018.50    0.720    99.80
2019.50    0.733    99.65
2020.50    0.747    99.52
2021.50    0.760    99.38
2022.50    0.772    99.25
2023.50    0.785    99.13
2024.50    0.798    99.01
2025.50    0.810    98.89
2026.50    0.823    98.77
2027.50    0.835    98.66
2028.50    0.847    98.56
2029.50    0.859    98.45
2030.50    0.871    98.35
2031.50    0.883    98.25
2032.50    0.894    98.16
2033.50    0.906    98.06
2034.50    0.917    97.97
2035.50    0.929    97.88
2036.50    0.940    97.79
2037.50    0.951    97.71
2038.50    0.962    97.63
2039.50    0.973    97.54
2040.50    0.984    97.47
2041.50    0.994    97.39
2042.50    1.005    97.31
2043.50    1.015    97.24
2044.50    1.026    97.16
2045.50    1.036    97.09
2046.50    1.046    97.02
2047.50    1.056    96.95
2048.50    1.066    96.89
2049.50    1.076    96.82
2050.50    1.086    96.76
2051.50    1.096    96.69
2052.50    1.106    96.63
2053.50    1.115    96.57
2054.50    1.125    96.51
2055.50    1.134    96.45
2056.50    1.144    96.39
2057.50    1.153    96.33
2058.50    1.162    96.27
2059.50    1.171    96.22
2060.50    1.180    96.16
2061.50    1.189    96.11
2062.50    1.198    96.06
2063.50    1.207    96.00
2064.50    1.215    95.95
2065.50    1.224    95.90
2066.50    1.232    95.85
2067.50    1.241    95.80
2068.50    1.249    95.75
2069.50    1.258    95.70
2070.50    1.266    95.66
2071.50    1.274    95.61
2072.50    1.282    95.56
2073.50    1.290    95.52
2074.50    1.298    95.47
2075.50    1.306    95.43
2076.50    1.314    95.38
2077.50    1.321    95.34
2078.50    1.329    95.29
2079.50    1.337    95.25
2080.50    1.344    95.21
2081.50    1.352    95.17
2082.50    1.359    95.13
2083.50    1.366    95.09
2084.50    1.374    95.05
2085.50    1.381    95.01
2086.50    1.388    94.97
2087.50    1.395    94.93
2088.50    1.402    94.89
2089.50    1.409    94.85
2090.50    1.416    94.81
2091.50    1.422    94.77
2092.50    1.429    94.74
2093.50    1.436    94.70
2094.50    1.442    94.66
2095.50    1.449    94.63
2096.50    1.455    94.59
2097.50    1.462    94.55
2098.50    1.468    94.52
2099.50    1.474    94.48
2100.50    1.481    94.45
2101.50    1.487    94.41
2102.50    1.493    94.38
2103.50    1.499    94.35
2104.50    1.505    94.31
2105.50    1.511    94.28
2106.50    1.517    94.25
2107.50    1.522    94.21
2108.50    1.528    94.18
2109.50    1.534    94.15
2110.50    1.539    94.12
2111.50    1.545    94.08
2112.50    1.550    94.05
2113.50    1.556    94.02
2114.50    1.561    93.99
2115.50    1.566    93.96
2116.50    1.572    93.93
2117.50    1.577    93.90
2118.50    1.582    93.87
2119.50    1.587    93.84
2120.50    1.592    93.81
2121.50    1.597    93.78
2122.50    1.602    93.75
2123.50    1.607    93.72
2124.50    1.612    93.69
2125.50    1.616    93.66
2126.50    1.621    93.63
2127.50    1.626    93.60
2128.50    1.630    93.57
2129.50    1.635    93.54
2130.50    1.639    93.52
2131.50    1.644    93.49
2132.50    1.648    93.46
2133.50    1.652    93.43
2134.50    1.656    93.40
2135.50    1.661    93.38
2136.50    1.665    93.35
2137.50    1.669    93.32
2138.50    1.673    93.29
2139.50    1.677    93.27
2140.50    1.681    93.24
2141.50    1.684    93.21
2142.50    1.688    93.19
2143.50    1.692    93.16
2144.50    1.696    93.13
2145.50    1.699    93.11
2146.50    1.703    93.08
2147.50    1.706    93.05
2148.50    1.710    93.03
2149.50    1.713    93.00
2150.50    1.717    92.98
2151.50    1.720    92.95
2152.50    1.723    92.93
2153.50    1.726    92.90
2154.50    1.730    92.87
2155.50    1.733    92.85
2156.50    1.736    92.82
2157.50    1.739    92.80
2158.50    1.742    92.77
2159.50    1.744    92.75
2160.50    1.747    92.72
2161.50    1.750    92.70
2162.50    1.753    92.67
2163.50    1.755    92.65
2164.50    1.758    92.62
2165.50    1.761    92.60
2166.50    1.763    92.58
2167.50    1.765    92.55
2168.50    1.768    92.53
2169.50    1.770    92.50
2170.50    1.772    92.48
2171.50    1.775    92.45
2172.50    1.777    92.43
2173.50    1.779    92.41
2174.50    1.781    92.38
2175.50    1.783    92.36
2176.50    1.785    92.33
2177.50    1.787    92.31
2178.50    1.789    92.29
2179.50    1.791    92.26
2180.50    1.792    92.24
2181.50    1.794    92.22
2182.50    1.796    92.19
2183.50    1.797    92.17
2184.50    1.799    92.15
2185.50    1.800    92.12
2186.50    1.802    92.10
2187.50    1.803    92.08
2188.50    1.805    92.05
2189.50    1.806    92.03
2190.50    1.807    92.01
2191.50    1.808    91.98
2192.50    1.809    91.96
2193.50    1.810    91.94
2194.50    1.811    91.91
2195.50    1.812    91.89
2196.50    1.813    91.87
2197.50    1.814    91.84
2198.50    1.815    91.82
2199.50    1.816    91.80
2200.50    1.816    91.77
2201.50    1.817    91.75
2202.50    1.817    91.73
2203.50    1.818    91.70
2204.50    1.818    91.68
2205.50    1.819    91.66
2206.50    1.819    91.64
2207.50    1.819    91.61
2208.50    1.820    91.59
2209.50    1.820    91.57
2210.50    1.820    91.54
2211.50    1.820    91.52
2212.50    1.820    91.50
2213.50    1.820    91.48
2214.50    1.820    91.45
2215.50    1.820    91.43
2216.50    1.820    91.41
2217.50    1.819    91.38
2218.50    1.819    91.36
2219.50    1.819    91.34
2220.50    1.818    91.31
2221.50    1.818    91.29
2222.50    1.817    91.27
2223.50    1.817    91.25
2224.50    1.816    91.22
2225.50    1.815    91.20
2226.50    1.814    91.18
2227.50    1.814    91.15
2228.50    1.813    91.13
2229.50    1.812    91.11
2230.50    1.811    91.08
2231.50    1.810    91.06
2232.50    1.809    91.04
2233.50    1.807    91.01
2234.50    1.806    90.99
2235.50    1.805    90.97
2236.50    1.804    90.94






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 18:10:07



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