Double Star Calculator - Orbit

Orbital Elements for STT287
WDS: STT287 WDS ID/Discoverer
P: 340.000 Orbital period (years)
a: 0.91 Semi-major axis (arcseconds)
i: 67.0 Inclination (degrees)
Ω: 166.9 Longitude of ascending node (degrees)
T: 2067.000 Epoch of periastron passage (year)
e: 0.34 Eccentricity
ω: 306.0 Longitude of periastron (degrees)
Start-Year: 1855.0 Year
End-Year: 2195.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT287
Position: 145127.53+445542.6 Epoch-2000 right ascension and declination
WDS-ID: 14515+4456 WDS designation
Discoverer Code: STT287 Discover designation and components
ADS number: 9418 Aitken Double Star catalog
HD number: 131315 HD catalog number
Hipparcos number: 72666 Hipparcos catalog number
V1: 8.40 Magnitude of the primary
V2: 8.62 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: Flags
Ephemerides: Ephemerides
Code: Hei1997 Reference

Double Star Orbit for STT287



WDS 6th Orbit including measures of STT287

-- 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 STT287
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.554     9.96
--------------------------
1855.00    0.508   285.49
1856.00    0.514   286.72
1857.00    0.520   287.93
1858.00    0.527   289.10
1859.00    0.533   290.25
1860.00    0.540   291.37
1861.00    0.546   292.46
1862.00    0.553   293.53
1863.00    0.560   294.57
1864.00    0.567   295.58
1865.00    0.574   296.57
1866.00    0.581   297.54
1867.00    0.589   298.48
1868.00    0.596   299.40
1869.00    0.603   300.29
1870.00    0.611   301.17
1871.00    0.618   302.02
1872.00    0.626   302.85
1873.00    0.633   303.66
1874.00    0.641   304.46
1875.00    0.649   305.23
1876.00    0.656   305.99
1877.00    0.664   306.73
1878.00    0.671   307.45
1879.00    0.679   308.16
1880.00    0.687   308.85
1881.00    0.694   309.52
1882.00    0.702   310.19
1883.00    0.710   310.83
1884.00    0.717   311.46
1885.00    0.725   312.08
1886.00    0.733   312.69
1887.00    0.740   313.29
1888.00    0.748   313.87
1889.00    0.755   314.44
1890.00    0.763   315.00
1891.00    0.770   315.55
1892.00    0.778   316.08
1893.00    0.785   316.61
1894.00    0.792   317.13
1895.00    0.799   317.64
1896.00    0.807   318.14
1897.00    0.814   318.63
1898.00    0.821   319.11
1899.00    0.828   319.59
1900.00    0.835   320.05
1901.00    0.842   320.51
1902.00    0.849   320.96
1903.00    0.855   321.40
1904.00    0.862   321.84
1905.00    0.869   322.27
1906.00    0.875   322.69
1907.00    0.882   323.11
1908.00    0.888   323.52
1909.00    0.895   323.93
1910.00    0.901   324.33
1911.00    0.907   324.72
1912.00    0.913   325.11
1913.00    0.919   325.50
1914.00    0.925   325.88
1915.00    0.931   326.25
1916.00    0.936   326.62
1917.00    0.942   326.99
1918.00    0.947   327.35
1919.00    0.953   327.70
1920.00    0.958   328.06
1921.00    0.963   328.41
1922.00    0.968   328.75
1923.00    0.973   329.09
1924.00    0.978   329.43
1925.00    0.983   329.77
1926.00    0.987   330.10
1927.00    0.992   330.43
1928.00    0.996   330.75
1929.00    1.001   331.08
1930.00    1.005   331.40
1931.00    1.009   331.71
1932.00    1.013   332.03
1933.00    1.016   332.34
1934.00    1.020   332.65
1935.00    1.024   332.96
1936.00    1.027   333.27
1937.00    1.030   333.57
1938.00    1.033   333.88
1939.00    1.036   334.18
1940.00    1.039   334.48
1941.00    1.042   334.77
1942.00    1.044   335.07
1943.00    1.047   335.36
1944.00    1.049   335.66
1945.00    1.051   335.95
1946.00    1.053   336.24
1947.00    1.055   336.53
1948.00    1.057   336.82
1949.00    1.058   337.11
1950.00    1.059   337.40
1951.00    1.061   337.68
1952.00    1.062   337.97
1953.00    1.063   338.25
1954.00    1.063   338.54
1955.00    1.064   338.82
1956.00    1.064   339.11
1957.00    1.064   339.39
1958.00    1.064   339.68
1959.00    1.064   339.96
1960.00    1.064   340.25
1961.00    1.063   340.53
1962.00    1.063   340.82
1963.00    1.062   341.10
1964.00    1.061   341.39
1965.00    1.059   341.67
1966.00    1.058   341.96
1967.00    1.056   342.25
1968.00    1.055   342.54
1969.00    1.053   342.83
1970.00    1.050   343.12
1971.00    1.048   343.41
1972.00    1.045   343.71
1973.00    1.043   344.00
1974.00    1.040   344.30
1975.00    1.036   344.60
1976.00    1.033   344.90
1977.00    1.029   345.20
1978.00    1.026   345.51
1979.00    1.021   345.82
1980.00    1.017   346.13
1981.00    1.013   346.44
1982.00    1.008   346.75
1983.00    1.003   347.07
1984.00    0.998   347.40
1985.00    0.993   347.72
1986.00    0.987   348.05
1987.00    0.981   348.38
1988.00    0.975   348.72
1989.00    0.969   349.06
1990.00    0.962   349.41
1991.00    0.955   349.76
1992.00    0.948   350.11
1993.00    0.941   350.47
1994.00    0.934   350.84
1995.00    0.926   351.21
1996.00    0.918   351.59
1997.00    0.910   351.98
1998.00    0.901   352.37
1999.00    0.892   352.77
2000.00    0.883   353.18
2001.00    0.874   353.60
2002.00    0.865   354.02
2003.00    0.855   354.46
2004.00    0.845   354.90
2005.00    0.835   355.36
2006.00    0.824   355.83
2007.00    0.813   356.31
2008.00    0.802   356.80
2009.00    0.791   357.31
2010.00    0.779   357.83
2011.00    0.768   358.37
2012.00    0.755   358.93
2013.00    0.743   359.50
2014.00    0.731     0.10
2015.00    0.718     0.71
2016.00    0.705     1.35
2017.00    0.691     2.01
2018.00    0.678     2.70
2019.00    0.664     3.41
2020.00    0.650     4.16
2021.00    0.636     4.94
2022.00    0.621     5.75
2023.00    0.607     6.61
2024.00    0.592     7.50
2025.00    0.577     8.45
2026.00    0.562     9.44
2027.00    0.546    10.49
2028.00    0.531    11.60
2029.00    0.515    12.78
2030.00    0.500    14.03
2031.00    0.484    15.36
2032.00    0.468    16.79
2033.00    0.452    18.31
2034.00    0.436    19.94
2035.00    0.421    21.70
2036.00    0.405    23.59
2037.00    0.390    25.63
2038.00    0.374    27.84
2039.00    0.359    30.23
2040.00    0.345    32.83
2041.00    0.331    35.65
2042.00    0.318    38.72
2043.00    0.305    42.05
2044.00    0.293    45.66
2045.00    0.282    49.56
2046.00    0.272    53.76
2047.00    0.264    58.24
2048.00    0.257    63.00
2049.00    0.252    67.98
2050.00    0.248    73.15
2051.00    0.246    78.43
2052.00    0.246    83.74
2053.00    0.248    89.02
2054.00    0.252    94.17
2055.00    0.257    99.14
2056.00    0.264   103.88
2057.00    0.273   108.35
2058.00    0.283   112.53
2059.00    0.293   116.42
2060.00    0.305   120.03
2061.00    0.317   123.36
2062.00    0.330   126.43
2063.00    0.344   129.27
2064.00    0.358   131.89
2065.00    0.372   134.31
2066.00    0.386   136.55
2067.00    0.401   138.63
2068.00    0.415   140.56
2069.00    0.430   142.37
2070.00    0.444   144.06
2071.00    0.458   145.64
2072.00    0.472   147.13
2073.00    0.486   148.54
2074.00    0.499   149.86
2075.00    0.512   151.12
2076.00    0.525   152.32
2077.00    0.537   153.47
2078.00    0.549   154.56
2079.00    0.561   155.60
2080.00    0.572   156.61
2081.00    0.582   157.57
2082.00    0.593   158.51
2083.00    0.602   159.41
2084.00    0.612   160.28
2085.00    0.620   161.13
2086.00    0.629   161.96
2087.00    0.636   162.76
2088.00    0.644   163.55
2089.00    0.651   164.32
2090.00    0.657   165.07
2091.00    0.663   165.81
2092.00    0.668   166.54
2093.00    0.673   167.26
2094.00    0.678   167.96
2095.00    0.682   168.66
2096.00    0.685   169.35
2097.00    0.688   170.03
2098.00    0.691   170.71
2099.00    0.693   171.38
2100.00    0.695   172.05
2101.00    0.696   172.72
2102.00    0.697   173.38
2103.00    0.698   174.04
2104.00    0.698   174.70
2105.00    0.698   175.36
2106.00    0.698   176.02
2107.00    0.697   176.69
2108.00    0.696   177.35
2109.00    0.695   178.02
2110.00    0.693   178.69
2111.00    0.691   179.36
2112.00    0.688   180.04
2113.00    0.686   180.72
2114.00    0.683   181.41
2115.00    0.680   182.10
2116.00    0.677   182.80
2117.00    0.673   183.51
2118.00    0.669   184.22
2119.00    0.665   184.95
2120.00    0.661   185.68
2121.00    0.657   186.42
2122.00    0.652   187.18
2123.00    0.647   187.94
2124.00    0.642   188.71
2125.00    0.637   189.50
2126.00    0.632   190.30
2127.00    0.627   191.11
2128.00    0.621   191.94
2129.00    0.616   192.78
2130.00    0.610   193.64
2131.00    0.604   194.51
2132.00    0.599   195.41
2133.00    0.593   196.31
2134.00    0.587   197.24
2135.00    0.581   198.18
2136.00    0.575   199.15
2137.00    0.569   200.13
2138.00    0.563   201.14
2139.00    0.557   202.17
2140.00    0.551   203.22
2141.00    0.545   204.29
2142.00    0.539   205.39
2143.00    0.533   206.51
2144.00    0.527   207.65
2145.00    0.522   208.82
2146.00    0.516   210.02
2147.00    0.510   211.25
2148.00    0.505   212.50
2149.00    0.499   213.78
2150.00    0.494   215.08
2151.00    0.489   216.42
2152.00    0.484   217.78
2153.00    0.479   219.17
2154.00    0.474   220.59
2155.00    0.470   222.03
2156.00    0.466   223.51
2157.00    0.461   225.01
2158.00    0.458   226.53
2159.00    0.454   228.08
2160.00    0.450   229.66
2161.00    0.447   231.26
2162.00    0.444   232.88
2163.00    0.442   234.52
2164.00    0.439   236.18
2165.00    0.437   237.86
2166.00    0.435   239.55
2167.00    0.434   241.26
2168.00    0.433   242.98
2169.00    0.432   244.70
2170.00    0.431   246.44
2171.00    0.431   248.17
2172.00    0.431   249.91
2173.00    0.431   251.65
2174.00    0.432   253.38
2175.00    0.432   255.10
2176.00    0.434   256.82
2177.00    0.435   258.53
2178.00    0.437   260.22
2179.00    0.439   261.90
2180.00    0.442   263.56
2181.00    0.444   265.20
2182.00    0.447   266.82
2183.00    0.451   268.42
2184.00    0.454   270.00
2185.00    0.458   271.55
2186.00    0.462   273.07
2187.00    0.466   274.57
2188.00    0.471   276.03
2189.00    0.476   277.47
2190.00    0.480   278.88
2191.00    0.486   280.26
2192.00    0.491   281.61
2193.00    0.497   282.94
2194.00    0.502   284.23






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 17:09:36



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