Double Star Calculator - Orbit

Orbital Elements for STF1687AB
WDS: STF1687AB WDS ID/Discoverer
P: 486.348 Orbital period (years)
a: 1.34595 Semi-major axis (arcseconds)
i: 34.132 Inclination (degrees)
Ω: 60.531 Longitude of ascending node (degrees)
T: 1929.221 Epoch of periastron passage (year)
e: 0.14466 Eccentricity
ω: 51.278 Longitude of periastron (degrees)
Start-Year: 1781.8259 Year
End-Year: 2268.1741 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1687AB
Position: 125317.77+211442.1 Epoch-2000 right ascension and declination
WDS-ID: 12533+2115 WDS designation
Discoverer Code: STF1687AB Discover designation and components
ADS number: 8695 Aitken Double Star catalog
HD number: 112033 HD catalog number
Hipparcos number: 62886 Hipparcos catalog number
V1: 5.15 Magnitude of the primary
V2: 7.08 Magnitude of the secondary
Equinox: Equinox
Date: 2014 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF1687AB



WDS 6th Orbit including measures of STF1687AB

-- 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 STF1687AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.223   205.51
--------------------------
1781.83    1.211   351.44
1782.83    1.211   352.19
1783.83    1.211   352.94
1784.83    1.211   353.69
1785.83    1.211   354.44
1786.83    1.211   355.18
1787.83    1.211   355.93
1788.83    1.211   356.68
1789.83    1.211   357.43
1790.83    1.212   358.18
1791.83    1.212   358.93
1792.83    1.212   359.67
1793.83    1.213     0.42
1794.83    1.213     1.17
1795.83    1.213     1.92
1796.83    1.214     2.66
1797.83    1.214     3.41
1798.83    1.215     4.15
1799.83    1.215     4.89
1800.83    1.216     5.64
1801.83    1.216     6.38
1802.83    1.217     7.12
1803.83    1.217     7.86
1804.83    1.218     8.61
1805.83    1.219     9.35
1806.83    1.219    10.08
1807.83    1.220    10.82
1808.83    1.221    11.56
1809.83    1.221    12.30
1810.83    1.222    13.03
1811.83    1.222    13.77
1812.83    1.223    14.50
1813.83    1.224    15.24
1814.83    1.225    15.97
1815.83    1.225    16.70
1816.83    1.226    17.43
1817.83    1.227    18.16
1818.83    1.227    18.89
1819.83    1.228    19.62
1820.83    1.229    20.35
1821.83    1.229    21.08
1822.83    1.230    21.80
1823.83    1.230    22.53
1824.83    1.231    23.25
1825.83    1.232    23.98
1826.83    1.232    24.70
1827.83    1.233    25.43
1828.83    1.233    26.15
1829.83    1.234    26.87
1830.83    1.234    27.59
1831.83    1.235    28.31
1832.83    1.235    29.03
1833.83    1.236    29.75
1834.83    1.236    30.47
1835.83    1.236    31.19
1836.83    1.237    31.91
1837.83    1.237    32.62
1838.83    1.237    33.34
1839.83    1.237    34.06
1840.83    1.238    34.78
1841.83    1.238    35.49
1842.83    1.238    36.21
1843.83    1.238    36.93
1844.83    1.238    37.64
1845.83    1.238    38.36
1846.83    1.238    39.08
1847.83    1.238    39.79
1848.83    1.237    40.51
1849.83    1.237    41.23
1850.83    1.237    41.95
1851.83    1.237    42.66
1852.83    1.236    43.38
1853.83    1.236    44.10
1854.83    1.235    44.82
1855.83    1.235    45.54
1856.83    1.234    46.26
1857.83    1.233    46.98
1858.83    1.232    47.71
1859.83    1.232    48.43
1860.83    1.231    49.16
1861.83    1.230    49.88
1862.83    1.229    50.61
1863.83    1.228    51.34
1864.83    1.227    52.06
1865.83    1.225    52.80
1866.83    1.224    53.53
1867.83    1.223    54.26
1868.83    1.221    55.00
1869.83    1.220    55.73
1870.83    1.218    56.47
1871.83    1.217    57.22
1872.83    1.215    57.96
1873.83    1.213    58.70
1874.83    1.211    59.45
1875.83    1.209    60.20
1876.83    1.207    60.95
1877.83    1.205    61.71
1878.83    1.203    62.47
1879.83    1.201    63.23
1880.83    1.199    63.99
1881.83    1.196    64.75
1882.83    1.194    65.52
1883.83    1.191    66.30
1884.83    1.189    67.07
1885.83    1.186    67.85
1886.83    1.184    68.63
1887.83    1.181    69.42
1888.83    1.178    70.21
1889.83    1.175    71.00
1890.83    1.172    71.80
1891.83    1.169    72.60
1892.83    1.166    73.40
1893.83    1.163    74.21
1894.83    1.160    75.03
1895.83    1.157    75.85
1896.83    1.154    76.67
1897.83    1.150    77.50
1898.83    1.147    78.33
1899.83    1.143    79.17
1900.83    1.140    80.01
1901.83    1.136    80.86
1902.83    1.133    81.71
1903.83    1.129    82.57
1904.83    1.126    83.43
1905.83    1.122    84.30
1906.83    1.118    85.18
1907.83    1.115    86.06
1908.83    1.111    86.95
1909.83    1.107    87.84
1910.83    1.103    88.74
1911.83    1.100    89.64
1912.83    1.096    90.55
1913.83    1.092    91.47
1914.83    1.088    92.40
1915.83    1.084    93.33
1916.83    1.081    94.26
1917.83    1.077    95.21
1918.83    1.073    96.16
1919.83    1.069    97.12
1920.83    1.065    98.08
1921.83    1.062    99.05
1922.83    1.058   100.03
1923.83    1.054   101.01
1924.83    1.051   102.00
1925.83    1.047   103.00
1926.83    1.043   104.01
1927.83    1.040   105.02
1928.83    1.036   106.04
1929.83    1.033   107.06
1930.83    1.030   108.10
1931.83    1.026   109.14
1932.83    1.023   110.18
1933.83    1.020   111.24
1934.83    1.017   112.29
1935.83    1.014   113.36
1936.83    1.011   114.43
1937.83    1.008   115.51
1938.83    1.005   116.59
1939.83    1.003   117.68
1940.83    1.000   118.78
1941.83    0.998   119.88
1942.83    0.995   120.99
1943.83    0.993   122.10
1944.83    0.991   123.21
1945.83    0.989   124.34
1946.83    0.987   125.46
1947.83    0.985   126.59
1948.83    0.983   127.72
1949.83    0.982   128.86
1950.83    0.981   130.00
1951.83    0.979   131.15
1952.83    0.978   132.29
1953.83    0.977   133.44
1954.83    0.976   134.59
1955.83    0.976   135.75
1956.83    0.975   136.90
1957.83    0.975   138.06
1958.83    0.975   139.21
1959.83    0.974   140.37
1960.83    0.975   141.52
1961.83    0.975   142.68
1962.83    0.975   143.84
1963.83    0.976   144.99
1964.83    0.976   146.14
1965.83    0.977   147.30
1966.83    0.978   148.45
1967.83    0.979   149.59
1968.83    0.980   150.74
1969.83    0.982   151.88
1970.83    0.983   153.01
1971.83    0.985   154.15
1972.83    0.987   155.28
1973.83    0.989   156.40
1974.83    0.991   157.52
1975.83    0.993   158.64
1976.83    0.996   159.75
1977.83    0.998   160.85
1978.83    1.001   161.95
1979.83    1.004   163.05
1980.83    1.007   164.13
1981.83    1.010   165.21
1982.83    1.013   166.29
1983.83    1.017   167.35
1984.83    1.020   168.41
1985.83    1.024   169.46
1986.83    1.027   170.51
1987.83    1.031   171.55
1988.83    1.035   172.58
1989.83    1.039   173.60
1990.83    1.043   174.61
1991.83    1.047   175.62
1992.83    1.051   176.61
1993.83    1.056   177.60
1994.83    1.060   178.59
1995.83    1.065   179.56
1996.83    1.069   180.52
1997.83    1.074   181.48
1998.83    1.079   182.43
1999.83    1.083   183.37
2000.83    1.088   184.30
2001.83    1.093   185.22
2002.83    1.098   186.14
2003.83    1.103   187.04
2004.83    1.108   187.94
2005.83    1.113   188.83
2006.83    1.119   189.71
2007.83    1.124   190.59
2008.83    1.129   191.45
2009.83    1.134   192.31
2010.83    1.139   193.16
2011.83    1.145   194.00
2012.83    1.150   194.84
2013.83    1.155   195.66
2014.83    1.161   196.48
2015.83    1.166   197.29
2016.83    1.172   198.10
2017.83    1.177   198.89
2018.83    1.182   199.68
2019.83    1.188   200.47
2020.83    1.193   201.24
2021.83    1.198   202.01
2022.83    1.204   202.77
2023.83    1.209   203.53
2024.83    1.215   204.27
2025.83    1.220   205.01
2026.83    1.225   205.75
2027.83    1.230   206.48
2028.83    1.236   207.20
2029.83    1.241   207.92
2030.83    1.246   208.63
2031.83    1.251   209.33
2032.83    1.257   210.03
2033.83    1.262   210.72
2034.83    1.267   211.41
2035.83    1.272   212.09
2036.83    1.277   212.77
2037.83    1.282   213.44
2038.83    1.287   214.10
2039.83    1.292   214.77
2040.83    1.296   215.42
2041.83    1.301   216.07
2042.83    1.306   216.72
2043.83    1.311   217.36
2044.83    1.315   218.00
2045.83    1.320   218.63
2046.83    1.324   219.26
2047.83    1.329   219.88
2048.83    1.333   220.50
2049.83    1.338   221.12
2050.83    1.342   221.73
2051.83    1.346   222.34
2052.83    1.351   222.94
2053.83    1.355   223.54
2054.83    1.359   224.14
2055.83    1.363   224.73
2056.83    1.367   225.32
2057.83    1.371   225.91
2058.83    1.375   226.49
2059.83    1.378   227.07
2060.83    1.382   227.65
2061.83    1.386   228.22
2062.83    1.389   228.79
2063.83    1.393   229.36
2064.83    1.396   229.92
2065.83    1.399   230.49
2066.83    1.403   231.04
2067.83    1.406   231.60
2068.83    1.409   232.16
2069.83    1.412   232.71
2070.83    1.415   233.26
2071.83    1.418   233.80
2072.83    1.421   234.35
2073.83    1.424   234.89
2074.83    1.426   235.43
2075.83    1.429   235.97
2076.83    1.432   236.51
2077.83    1.434   237.04
2078.83    1.437   237.58
2079.83    1.439   238.11
2080.83    1.441   238.64
2081.83    1.443   239.17
2082.83    1.446   239.69
2083.83    1.448   240.22
2084.83    1.450   240.74
2085.83    1.452   241.26
2086.83    1.453   241.78
2087.83    1.455   242.30
2088.83    1.457   242.82
2089.83    1.459   243.34
2090.83    1.460   243.85
2091.83    1.462   244.37
2092.83    1.463   244.88
2093.83    1.464   245.39
2094.83    1.466   245.90
2095.83    1.467   246.42
2096.83    1.468   246.93
2097.83    1.469   247.44
2098.83    1.470   247.94
2099.83    1.471   248.45
2100.83    1.472   248.96
2101.83    1.472   249.47
2102.83    1.473   249.97
2103.83    1.474   250.48
2104.83    1.474   250.98
2105.83    1.475   251.49
2106.83    1.475   251.99
2107.83    1.476   252.50
2108.83    1.476   253.00
2109.83    1.476   253.51
2110.83    1.476   254.01
2111.83    1.476   254.51
2112.83    1.476   255.02
2113.83    1.476   255.52
2114.83    1.476   256.03
2115.83    1.476   256.53
2116.83    1.476   257.03
2117.83    1.476   257.54
2118.83    1.475   258.04
2119.83    1.475   258.55
2120.83    1.474   259.05
2121.83    1.474   259.56
2122.83    1.473   260.06
2123.83    1.473   260.57
2124.83    1.472   261.08
2125.83    1.471   261.58
2126.83    1.470   262.09
2127.83    1.469   262.60
2128.83    1.468   263.11
2129.83    1.467   263.62
2130.83    1.466   264.13
2131.83    1.465   264.64
2132.83    1.464   265.15
2133.83    1.463   265.67
2134.83    1.462   266.18
2135.83    1.460   266.69
2136.83    1.459   267.21
2137.83    1.458   267.73
2138.83    1.456   268.24
2139.83    1.455   268.76
2140.83    1.453   269.28
2141.83    1.451   269.80
2142.83    1.450   270.32
2143.83    1.448   270.85
2144.83    1.446   271.37
2145.83    1.445   271.90
2146.83    1.443   272.42
2147.83    1.441   272.95
2148.83    1.439   273.48
2149.83    1.437   274.01
2150.83    1.435   274.55
2151.83    1.433   275.08
2152.83    1.431   275.61
2153.83    1.429   276.15
2154.83    1.427   276.69
2155.83    1.425   277.23
2156.83    1.423   277.77
2157.83    1.420   278.32
2158.83    1.418   278.86
2159.83    1.416   279.41
2160.83    1.414   279.96
2161.83    1.411   280.51
2162.83    1.409   281.06
2163.83    1.407   281.61
2164.83    1.404   282.17
2165.83    1.402   282.73
2166.83    1.399   283.29
2167.83    1.397   283.85
2168.83    1.394   284.41
2169.83    1.392   284.98
2170.83    1.389   285.55
2171.83    1.387   286.12
2172.83    1.384   286.69
2173.83    1.381   287.26
2174.83    1.379   287.84
2175.83    1.376   288.42
2176.83    1.374   289.00
2177.83    1.371   289.58
2178.83    1.368   290.17
2179.83    1.366   290.76
2180.83    1.363   291.35
2181.83    1.360   291.94
2182.83    1.358   292.53
2183.83    1.355   293.13
2184.83    1.352   293.73
2185.83    1.350   294.33
2186.83    1.347   294.94
2187.83    1.344   295.54
2188.83    1.342   296.15
2189.83    1.339   296.76
2190.83    1.336   297.38
2191.83    1.334   297.99
2192.83    1.331   298.61
2193.83    1.328   299.23
2194.83    1.326   299.86
2195.83    1.323   300.48
2196.83    1.320   301.11
2197.83    1.318   301.74
2198.83    1.315   302.38
2199.83    1.312   303.01
2200.83    1.310   303.65
2201.83    1.307   304.29
2202.83    1.305   304.94
2203.83    1.302   305.58
2204.83    1.300   306.23
2205.83    1.297   306.88
2206.83    1.295   307.54
2207.83    1.292   308.20
2208.83    1.290   308.85
2209.83    1.287   309.52
2210.83    1.285   310.18
2211.83    1.283   310.85
2212.83    1.280   311.52
2213.83    1.278   312.19
2214.83    1.276   312.86
2215.83    1.273   313.54
2216.83    1.271   314.22
2217.83    1.269   314.90
2218.83    1.267   315.58
2219.83    1.265   316.26
2220.83    1.263   316.95
2221.83    1.260   317.64
2222.83    1.258   318.34
2223.83    1.256   319.03
2224.83    1.254   319.73
2225.83    1.253   320.43
2226.83    1.251   321.13
2227.83    1.249   321.83
2228.83    1.247   322.54
2229.83    1.245   323.24
2230.83    1.243   323.95
2231.83    1.242   324.66
2232.83    1.240   325.38
2233.83    1.239   326.09
2234.83    1.237   326.81
2235.83    1.235   327.53
2236.83    1.234   328.25
2237.83    1.233   328.97
2238.83    1.231   329.69
2239.83    1.230   330.42
2240.83    1.228   331.15
2241.83    1.227   331.88
2242.83    1.226   332.61
2243.83    1.225   333.34
2244.83    1.224   334.07
2245.83    1.223   334.80
2246.83    1.222   335.54
2247.83    1.221   336.28
2248.83    1.220   337.01
2249.83    1.219   337.75
2250.83    1.218   338.49
2251.83    1.217   339.23
2252.83    1.216   339.97
2253.83    1.216   340.72
2254.83    1.215   341.46
2255.83    1.214   342.20
2256.83    1.214   342.95
2257.83    1.213   343.70
2258.83    1.213   344.44
2259.83    1.212   345.19
2260.83    1.212   345.94
2261.83    1.212   346.68
2262.83    1.211   347.43
2263.83    1.211   348.18
2264.83    1.211   348.93
2265.83    1.211   349.68
2266.83    1.211   350.43
2267.83    1.211   351.18






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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 16:50:40



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