Double Star Calculator - Orbit

Orbital Elements for STF1500
WDS: STF1500 WDS ID/Discoverer
P: 680.145 Orbital period (years)
a: 1.59598 Semi-major axis (arcseconds)
i: 101.993 Inclination (degrees)
Ω: 132.744 Longitude of ascending node (degrees)
T: 1774.466 Epoch of periastron passage (year)
e: 0.30807 Eccentricity
ω: 78.776 Longitude of periastron (degrees)
Start-Year: 1684.9276 Year
End-Year: 2365.0724 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1500
Position: 110002.02-032816.5 Epoch-2000 right ascension and declination
WDS-ID: 11000-0328 WDS designation
Discoverer Code: STF1500 Discover designation and components
ADS number: 8007 Aitken Double Star catalog
HD number: 95280 HD catalog number
Hipparcos number: 53765 Hipparcos catalog number
V1: 7.91 Magnitude of the primary
V2: 8.27 Magnitude of the secondary
Equinox: Equinox
Date: 2015 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: Izm2019 Reference

Double Star Orbit for STF1500



WDS 6th Orbit including measures of STF1500

-- 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 STF1500
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.268   297.83
--------------------------
1684.93    1.373   133.08
1685.93    1.369   132.94
1686.93    1.364   132.79
1687.93    1.360   132.65
1688.93    1.355   132.51
1689.93    1.350   132.36
1690.93    1.345   132.21
1691.93    1.339   132.07
1692.93    1.333   131.92
1693.93    1.328   131.77
1694.93    1.322   131.61
1695.93    1.315   131.46
1696.93    1.309   131.31
1697.93    1.303   131.15
1698.93    1.296   130.99
1699.93    1.289   130.83
1700.93    1.282   130.67
1701.93    1.274   130.51
1702.93    1.267   130.34
1703.93    1.259   130.18
1704.93    1.251   130.01
1705.93    1.243   129.83
1706.93    1.235   129.66
1707.93    1.227   129.49
1708.93    1.218   129.31
1709.93    1.209   129.13
1710.93    1.200   128.94
1711.93    1.191   128.76
1712.93    1.181   128.57
1713.93    1.172   128.37
1714.93    1.162   128.18
1715.93    1.152   127.98
1716.93    1.141   127.78
1717.93    1.131   127.57
1718.93    1.120   127.36
1719.93    1.109   127.14
1720.93    1.098   126.93
1721.93    1.087   126.70
1722.93    1.076   126.47
1723.93    1.064   126.24
1724.93    1.052   126.00
1725.93    1.040   125.76
1726.93    1.028   125.51
1727.93    1.016   125.26
1728.93    1.003   124.99
1729.93    0.990   124.73
1730.93    0.977   124.45
1731.93    0.964   124.17
1732.93    0.951   123.88
1733.93    0.938   123.58
1734.93    0.924   123.27
1735.93    0.910   122.95
1736.93    0.896   122.63
1737.93    0.882   122.29
1738.93    0.868   121.94
1739.93    0.853   121.58
1740.93    0.838   121.21
1741.93    0.824   120.82
1742.93    0.809   120.42
1743.93    0.794   120.01
1744.93    0.778   119.58
1745.93    0.763   119.13
1746.93    0.747   118.66
1747.93    0.732   118.17
1748.93    0.716   117.66
1749.93    0.700   117.13
1750.93    0.684   116.58
1751.93    0.668   115.99
1752.93    0.652   115.38
1753.93    0.636   114.74
1754.93    0.619   114.06
1755.93    0.603   113.35
1756.93    0.587   112.59
1757.93    0.570   111.80
1758.93    0.554   110.95
1759.93    0.537   110.06
1760.93    0.521   109.10
1761.93    0.504   108.09
1762.93    0.488   107.01
1763.93    0.471   105.85
1764.93    0.455   104.60
1765.93    0.439   103.27
1766.93    0.423   101.84
1767.93    0.407   100.29
1768.93    0.392    98.62
1769.93    0.376    96.81
1770.93    0.361    94.84
1771.93    0.346    92.71
1772.93    0.332    90.39
1773.93    0.318    87.87
1774.93    0.305    85.13
1775.93    0.293    82.15
1776.93    0.281    78.91
1777.93    0.270    75.40
1778.93    0.261    71.61
1779.93    0.252    67.54
1780.93    0.245    63.21
1781.93    0.239    58.64
1782.93    0.234    53.87
1783.93    0.232    48.96
1784.93    0.231    43.96
1785.93    0.231    38.95
1786.93    0.233    34.01
1787.93    0.237    29.19
1788.93    0.243    24.57
1789.93    0.250    20.17
1790.93    0.258    16.04
1791.93    0.268    12.18
1792.93    0.278     8.60
1793.93    0.290     5.29
1794.93    0.302     2.24
1795.93    0.315   359.44
1796.93    0.329   356.86
1797.93    0.343   354.50
1798.93    0.357   352.32
1799.93    0.372   350.32
1800.93    0.388   348.47
1801.93    0.403   346.77
1802.93    0.419   345.19
1803.93    0.435   343.73
1804.93    0.451   342.37
1805.93    0.468   341.11
1806.93    0.484   339.93
1807.93    0.501   338.83
1808.93    0.517   337.81
1809.93    0.534   336.84
1810.93    0.551   335.93
1811.93    0.567   335.08
1812.93    0.584   334.28
1813.93    0.600   333.52
1814.93    0.617   332.80
1815.93    0.634   332.11
1816.93    0.650   331.47
1817.93    0.667   330.85
1818.93    0.683   330.27
1819.93    0.699   329.71
1820.93    0.715   329.18
1821.93    0.732   328.67
1822.93    0.748   328.18
1823.93    0.764   327.71
1824.93    0.779   327.26
1825.93    0.795   326.83
1826.93    0.811   326.42
1827.93    0.826   326.02
1828.93    0.842   325.64
1829.93    0.857   325.27
1830.93    0.872   324.91
1831.93    0.887   324.57
1832.93    0.902   324.24
1833.93    0.916   323.91
1834.93    0.931   323.60
1835.93    0.946   323.30
1836.93    0.960   323.00
1837.93    0.974   322.72
1838.93    0.988   322.44
1839.93    1.002   322.17
1840.93    1.016   321.91
1841.93    1.029   321.66
1842.93    1.042   321.41
1843.93    1.056   321.16
1844.93    1.069   320.93
1845.93    1.082   320.70
1846.93    1.095   320.47
1847.93    1.107   320.25
1848.93    1.120   320.04
1849.93    1.132   319.83
1850.93    1.144   319.62
1851.93    1.156   319.42
1852.93    1.168   319.22
1853.93    1.180   319.03
1854.93    1.191   318.84
1855.93    1.202   318.65
1856.93    1.214   318.47
1857.93    1.225   318.29
1858.93    1.235   318.12
1859.93    1.246   317.94
1860.93    1.257   317.77
1861.93    1.267   317.61
1862.93    1.277   317.44
1863.93    1.287   317.28
1864.93    1.297   317.12
1865.93    1.307   316.96
1866.93    1.316   316.81
1867.93    1.326   316.65
1868.93    1.335   316.50
1869.93    1.344   316.35
1870.93    1.353   316.21
1871.93    1.362   316.06
1872.93    1.370   315.92
1873.93    1.379   315.78
1874.93    1.387   315.64
1875.93    1.395   315.50
1876.93    1.403   315.37
1877.93    1.411   315.23
1878.93    1.418   315.10
1879.93    1.426   314.97
1880.93    1.433   314.84
1881.93    1.440   314.71
1882.93    1.447   314.58
1883.93    1.454   314.45
1884.93    1.461   314.33
1885.93    1.468   314.20
1886.93    1.474   314.08
1887.93    1.480   313.96
1888.93    1.486   313.84
1889.93    1.492   313.72
1890.93    1.498   313.60
1891.93    1.504   313.48
1892.93    1.509   313.36
1893.93    1.515   313.25
1894.93    1.520   313.13
1895.93    1.525   313.01
1896.93    1.530   312.90
1897.93    1.535   312.79
1898.93    1.540   312.67
1899.93    1.544   312.56
1900.93    1.548   312.45
1901.93    1.553   312.34
1902.93    1.557   312.23
1903.93    1.561   312.12
1904.93    1.565   312.01
1905.93    1.568   311.90
1906.93    1.572   311.79
1907.93    1.575   311.69
1908.93    1.579   311.58
1909.93    1.582   311.47
1910.93    1.585   311.37
1911.93    1.588   311.26
1912.93    1.591   311.15
1913.93    1.593   311.05
1914.93    1.596   310.94
1915.93    1.598   310.84
1916.93    1.600   310.74
1917.93    1.602   310.63
1918.93    1.605   310.53
1919.93    1.606   310.42
1920.93    1.608   310.32
1921.93    1.610   310.22
1922.93    1.611   310.12
1923.93    1.613   310.01
1924.93    1.614   309.91
1925.93    1.615   309.81
1926.93    1.616   309.71
1927.93    1.617   309.60
1928.93    1.618   309.50
1929.93    1.619   309.40
1930.93    1.619   309.30
1931.93    1.620   309.20
1932.93    1.620   309.10
1933.93    1.621   308.99
1934.93    1.621   308.89
1935.93    1.621   308.79
1936.93    1.621   308.69
1937.93    1.621   308.59
1938.93    1.620   308.49
1939.93    1.620   308.39
1940.93    1.619   308.28
1941.93    1.619   308.18
1942.93    1.618   308.08
1943.93    1.617   307.98
1944.93    1.616   307.88
1945.93    1.615   307.77
1946.93    1.614   307.67
1947.93    1.613   307.57
1948.93    1.612   307.47
1949.93    1.610   307.36
1950.93    1.609   307.26
1951.93    1.607   307.16
1952.93    1.606   307.06
1953.93    1.604   306.95
1954.93    1.602   306.85
1955.93    1.600   306.74
1956.93    1.598   306.64
1957.93    1.596   306.54
1958.93    1.593   306.43
1959.93    1.591   306.33
1960.93    1.589   306.22
1961.93    1.586   306.11
1962.93    1.584   306.01
1963.93    1.581   305.90
1964.93    1.578   305.80
1965.93    1.575   305.69
1966.93    1.572   305.58
1967.93    1.569   305.47
1968.93    1.566   305.36
1969.93    1.563   305.26
1970.93    1.560   305.15
1971.93    1.556   305.04
1972.93    1.553   304.93
1973.93    1.549   304.81
1974.93    1.546   304.70
1975.93    1.542   304.59
1976.93    1.538   304.48
1977.93    1.534   304.37
1978.93    1.531   304.25
1979.93    1.527   304.14
1980.93    1.522   304.02
1981.93    1.518   303.91
1982.93    1.514   303.79
1983.93    1.510   303.68
1984.93    1.505   303.56
1985.93    1.501   303.44
1986.93    1.497   303.32
1987.93    1.492   303.20
1988.93    1.487   303.08
1989.93    1.483   302.96
1990.93    1.478   302.84
1991.93    1.473   302.72
1992.93    1.468   302.59
1993.93    1.463   302.47
1994.93    1.458   302.35
1995.93    1.453   302.22
1996.93    1.448   302.09
1997.93    1.442   301.97
1998.93    1.437   301.84
1999.93    1.432   301.71
2000.93    1.426   301.58
2001.93    1.421   301.45
2002.93    1.415   301.31
2003.93    1.410   301.18
2004.93    1.404   301.04
2005.93    1.398   300.91
2006.93    1.392   300.77
2007.93    1.387   300.63
2008.93    1.381   300.49
2009.93    1.375   300.35
2010.93    1.369   300.21
2011.93    1.363   300.07
2012.93    1.357   299.93
2013.93    1.350   299.78
2014.93    1.344   299.63
2015.93    1.338   299.49
2016.93    1.332   299.34
2017.93    1.325   299.18
2018.93    1.319   299.03
2019.93    1.312   298.88
2020.93    1.306   298.72
2021.93    1.299   298.57
2022.93    1.292   298.41
2023.93    1.286   298.25
2024.93    1.279   298.08
2025.93    1.272   297.92
2026.93    1.265   297.75
2027.93    1.259   297.59
2028.93    1.252   297.42
2029.93    1.245   297.25
2030.93    1.238   297.07
2031.93    1.231   296.90
2032.93    1.224   296.72
2033.93    1.216   296.54
2034.93    1.209   296.36
2035.93    1.202   296.18
2036.93    1.195   295.99
2037.93    1.188   295.81
2038.93    1.180   295.62
2039.93    1.173   295.42
2040.93    1.166   295.23
2041.93    1.158   295.03
2042.93    1.151   294.83
2043.93    1.143   294.63
2044.93    1.136   294.42
2045.93    1.128   294.21
2046.93    1.121   294.00
2047.93    1.113   293.79
2048.93    1.105   293.57
2049.93    1.098   293.35
2050.93    1.090   293.13
2051.93    1.082   292.90
2052.93    1.074   292.68
2053.93    1.067   292.44
2054.93    1.059   292.21
2055.93    1.051   291.97
2056.93    1.043   291.72
2057.93    1.035   291.48
2058.93    1.027   291.23
2059.93    1.019   290.97
2060.93    1.011   290.71
2061.93    1.003   290.45
2062.93    0.995   290.18
2063.93    0.987   289.91
2064.93    0.979   289.64
2065.93    0.971   289.36
2066.93    0.963   289.07
2067.93    0.955   288.78
2068.93    0.947   288.49
2069.93    0.939   288.19
2070.93    0.931   287.88
2071.93    0.923   287.57
2072.93    0.915   287.26
2073.93    0.907   286.94
2074.93    0.899   286.61
2075.93    0.890   286.28
2076.93    0.882   285.94
2077.93    0.874   285.59
2078.93    0.866   285.24
2079.93    0.858   284.88
2080.93    0.850   284.52
2081.93    0.841   284.14
2082.93    0.833   283.76
2083.93    0.825   283.37
2084.93    0.817   282.98
2085.93    0.809   282.58
2086.93    0.801   282.16
2087.93    0.793   281.74
2088.93    0.785   281.32
2089.93    0.777   280.88
2090.93    0.768   280.43
2091.93    0.760   279.98
2092.93    0.752   279.51
2093.93    0.744   279.03
2094.93    0.736   278.55
2095.93    0.728   278.05
2096.93    0.721   277.54
2097.93    0.713   277.03
2098.93    0.705   276.49
2099.93    0.697   275.95
2100.93    0.689   275.40
2101.93    0.681   274.83
2102.93    0.674   274.25
2103.93    0.666   273.66
2104.93    0.658   273.05
2105.93    0.651   272.43
2106.93    0.643   271.79
2107.93    0.636   271.14
2108.93    0.629   270.47
2109.93    0.621   269.79
2110.93    0.614   269.09
2111.93    0.607   268.37
2112.93    0.600   267.64
2113.93    0.593   266.89
2114.93    0.586   266.12
2115.93    0.579   265.34
2116.93    0.572   264.53
2117.93    0.565   263.71
2118.93    0.559   262.86
2119.93    0.552   262.00
2120.93    0.546   261.12
2121.93    0.540   260.21
2122.93    0.533   259.29
2123.93    0.527   258.34
2124.93    0.521   257.37
2125.93    0.516   256.38
2126.93    0.510   255.37
2127.93    0.505   254.33
2128.93    0.499   253.27
2129.93    0.494   252.19
2130.93    0.489   251.09
2131.93    0.484   249.96
2132.93    0.480   248.81
2133.93    0.475   247.64
2134.93    0.471   246.45
2135.93    0.467   245.24
2136.93    0.463   244.00
2137.93    0.459   242.75
2138.93    0.455   241.47
2139.93    0.452   240.18
2140.93    0.449   238.86
2141.93    0.446   237.53
2142.93    0.443   236.18
2143.93    0.441   234.82
2144.93    0.439   233.44
2145.93    0.437   232.05
2146.93    0.435   230.65
2147.93    0.434   229.24
2148.93    0.432   227.81
2149.93    0.431   226.39
2150.93    0.431   224.95
2151.93    0.430   223.51
2152.93    0.430   222.07
2153.93    0.430   220.63
2154.93    0.430   219.19
2155.93    0.431   217.76
2156.93    0.432   216.32
2157.93    0.433   214.90
2158.93    0.434   213.48
2159.93    0.436   212.07
2160.93    0.438   210.67
2161.93    0.440   209.29
2162.93    0.442   207.91
2163.93    0.444   206.56
2164.93    0.447   205.22
2165.93    0.450   203.89
2166.93    0.453   202.59
2167.93    0.457   201.30
2168.93    0.460   200.03
2169.93    0.464   198.78
2170.93    0.468   197.56
2171.93    0.472   196.35
2172.93    0.477   195.17
2173.93    0.481   194.01
2174.93    0.486   192.87
2175.93    0.491   191.75
2176.93    0.496   190.66
2177.93    0.501   189.59
2178.93    0.507   188.54
2179.93    0.512   187.51
2180.93    0.518   186.51
2181.93    0.524   185.52
2182.93    0.530   184.56
2183.93    0.536   183.62
2184.93    0.542   182.71
2185.93    0.548   181.81
2186.93    0.555   180.93
2187.93    0.561   180.08
2188.93    0.568   179.24
2189.93    0.574   178.42
2190.93    0.581   177.62
2191.93    0.588   176.84
2192.93    0.595   176.08
2193.93    0.602   175.34
2194.93    0.609   174.61
2195.93    0.616   173.90
2196.93    0.624   173.21
2197.93    0.631   172.53
2198.93    0.638   171.87
2199.93    0.646   171.22
2200.93    0.653   170.59
2201.93    0.661   169.97
2202.93    0.668   169.37
2203.93    0.676   168.78
2204.93    0.684   168.20
2205.93    0.691   167.64
2206.93    0.699   167.09
2207.93    0.707   166.55
2208.93    0.714   166.02
2209.93    0.722   165.50
2210.93    0.730   165.00
2211.93    0.738   164.50
2212.93    0.746   164.02
2213.93    0.754   163.54
2214.93    0.762   163.08
2215.93    0.770   162.62
2216.93    0.778   162.18
2217.93    0.785   161.74
2218.93    0.793   161.32
2219.93    0.801   160.90
2220.93    0.809   160.49
2221.93    0.817   160.08
2222.93    0.825   159.69
2223.93    0.833   159.30
2224.93    0.841   158.92
2225.93    0.849   158.55
2226.93    0.857   158.18
2227.93    0.865   157.82
2228.93    0.873   157.47
2229.93    0.881   157.12
2230.93    0.889   156.78
2231.93    0.897   156.45
2232.93    0.905   156.12
2233.93    0.913   155.80
2234.93    0.921   155.48
2235.93    0.928   155.17
2236.93    0.936   154.86
2237.93    0.944   154.56
2238.93    0.952   154.26
2239.93    0.960   153.97
2240.93    0.967   153.68
2241.93    0.975   153.40
2242.93    0.983   153.12
2243.93    0.990   152.85
2244.93    0.998   152.58
2245.93    1.006   152.31
2246.93    1.013   152.05
2247.93    1.021   151.79
2248.93    1.028   151.54
2249.93    1.036   151.29
2250.93    1.043   151.04
2251.93    1.050   150.80
2252.93    1.058   150.56
2253.93    1.065   150.32
2254.93    1.072   150.09
2255.93    1.080   149.86
2256.93    1.087   149.63
2257.93    1.094   149.41
2258.93    1.101   149.19
2259.93    1.108   148.97
2260.93    1.115   148.75
2261.93    1.122   148.54
2262.93    1.129   148.33
2263.93    1.136   148.12
2264.93    1.143   147.92
2265.93    1.150   147.71
2266.93    1.156   147.51
2267.93    1.163   147.31
2268.93    1.169   147.12
2269.93    1.176   146.92
2270.93    1.183   146.73
2271.93    1.189   146.54
2272.93    1.195   146.36
2273.93    1.202   146.17
2274.93    1.208   145.99
2275.93    1.214   145.81
2276.93    1.220   145.63
2277.93    1.226   145.45
2278.93    1.232   145.27
2279.93    1.238   145.10
2280.93    1.244   144.92
2281.93    1.250   144.75
2282.93    1.256   144.58
2283.93    1.261   144.41
2284.93    1.267   144.25
2285.93    1.272   144.08
2286.93    1.278   143.92
2287.93    1.283   143.75
2288.93    1.288   143.59
2289.93    1.294   143.43
2290.93    1.299   143.27
2291.93    1.304   143.12
2292.93    1.309   142.96
2293.93    1.314   142.81
2294.93    1.318   142.65
2295.93    1.323   142.50
2296.93    1.328   142.35
2297.93    1.332   142.20
2298.93    1.337   142.05
2299.93    1.341   141.90
2300.93    1.345   141.75
2301.93    1.349   141.60
2302.93    1.354   141.46
2303.93    1.358   141.31
2304.93    1.361   141.17
2305.93    1.365   141.03
2306.93    1.369   140.88
2307.93    1.373   140.74
2308.93    1.376   140.60
2309.93    1.379   140.46
2310.93    1.383   140.32
2311.93    1.386   140.18
2312.93    1.389   140.04
2313.93    1.392   139.90
2314.93    1.395   139.77
2315.93    1.398   139.63
2316.93    1.400   139.49
2317.93    1.403   139.36
2318.93    1.405   139.22
2319.93    1.408   139.09
2320.93    1.410   138.95
2321.93    1.412   138.82
2322.93    1.414   138.69
2323.93    1.416   138.55
2324.93    1.418   138.42
2325.93    1.419   138.29
2326.93    1.421   138.16
2327.93    1.422   138.02
2328.93    1.423   137.89
2329.93    1.425   137.76
2330.93    1.426   137.63
2331.93    1.426   137.50
2332.93    1.427   137.37
2333.93    1.428   137.24
2334.93    1.428   137.11
2335.93    1.429   136.98
2336.93    1.429   136.85
2337.93    1.429   136.72
2338.93    1.429   136.58
2339.93    1.429   136.45
2340.93    1.428   136.32
2341.93    1.428   136.19
2342.93    1.427   136.06
2343.93    1.426   135.93
2344.93    1.425   135.80
2345.93    1.424   135.67
2346.93    1.423   135.54
2347.93    1.422   135.41
2348.93    1.420   135.27
2349.93    1.419   135.14
2350.93    1.417   135.01
2351.93    1.415   134.88
2352.93    1.413   134.74
2353.93    1.410   134.61
2354.93    1.408   134.47
2355.93    1.405   134.34
2356.93    1.402   134.20
2357.93    1.399   134.07
2358.93    1.396   133.93
2359.93    1.393   133.80
2360.93    1.390   133.66
2361.93    1.386   133.52
2362.93    1.382   133.38
2363.93    1.378   133.24
2364.93    1.374   133.10






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 16:32:34



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