Double Star Calculator - Orbit

Orbital Elements for STF1527
WDS: STF1527 WDS ID/Discoverer
P: 415.000 Orbital period (years)
a: 2.225 Semi-major axis (arcseconds)
i: 55.6 Inclination (degrees)
Ω: 188.0 Longitude of ascending node (degrees)
T: 2010.503 Epoch of periastron passage (year)
e: 0.8511 Eccentricity
ω: 0.5 Longitude of periastron (degrees)
Start-Year: 1817.5 Year
End-Year: 2232.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1527
Position: 111859.91+141606.9 Epoch-2000 right ascension and declination
WDS-ID: 11190+1416 WDS designation
Discoverer Code: STF1527 Discover designation and components
ADS number: 8128 Aitken Double Star catalog
HD number: 98354 HD catalog number
Hipparcos number: 55254 Hipparcos catalog number
V1: 7.01 Magnitude of the primary
V2: 7.99 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2012 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: Tok2012b Reference

Double Star Orbit for STF1527



WDS 6th Orbit including measures of STF1527

-- 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 STF1527
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.759   324.58
--------------------------
1817.50    4.103     9.37
1818.50    4.101     9.45
1819.50    4.098     9.53
1820.50    4.096     9.60
1821.50    4.093     9.68
1822.50    4.090     9.75
1823.50    4.088     9.83
1824.50    4.085     9.91
1825.50    4.081     9.98
1826.50    4.078    10.06
1827.50    4.075    10.14
1828.50    4.071    10.21
1829.50    4.067    10.29
1830.50    4.063    10.37
1831.50    4.059    10.44
1832.50    4.055    10.52
1833.50    4.051    10.60
1834.50    4.046    10.68
1835.50    4.042    10.75
1836.50    4.037    10.83
1837.50    4.032    10.91
1838.50    4.027    10.99
1839.50    4.022    11.07
1840.50    4.016    11.15
1841.50    4.011    11.23
1842.50    4.005    11.30
1843.50    3.999    11.38
1844.50    3.993    11.46
1845.50    3.987    11.54
1846.50    3.981    11.62
1847.50    3.974    11.70
1848.50    3.968    11.79
1849.50    3.961    11.87
1850.50    3.954    11.95
1851.50    3.947    12.03
1852.50    3.940    12.11
1853.50    3.933    12.19
1854.50    3.925    12.28
1855.50    3.918    12.36
1856.50    3.910    12.44
1857.50    3.902    12.53
1858.50    3.894    12.61
1859.50    3.886    12.69
1860.50    3.877    12.78
1861.50    3.869    12.86
1862.50    3.860    12.95
1863.50    3.851    13.03
1864.50    3.842    13.12
1865.50    3.833    13.21
1866.50    3.824    13.29
1867.50    3.814    13.38
1868.50    3.805    13.47
1869.50    3.795    13.56
1870.50    3.785    13.65
1871.50    3.775    13.73
1872.50    3.764    13.82
1873.50    3.754    13.91
1874.50    3.743    14.01
1875.50    3.733    14.10
1876.50    3.722    14.19
1877.50    3.710    14.28
1878.50    3.699    14.37
1879.50    3.688    14.47
1880.50    3.676    14.56
1881.50    3.664    14.66
1882.50    3.652    14.75
1883.50    3.640    14.85
1884.50    3.628    14.94
1885.50    3.615    15.04
1886.50    3.603    15.14
1887.50    3.590    15.24
1888.50    3.577    15.34
1889.50    3.564    15.44
1890.50    3.550    15.54
1891.50    3.537    15.64
1892.50    3.523    15.74
1893.50    3.509    15.84
1894.50    3.495    15.95
1895.50    3.481    16.05
1896.50    3.466    16.16
1897.50    3.452    16.26
1898.50    3.437    16.37
1899.50    3.422    16.48
1900.50    3.407    16.59
1901.50    3.391    16.70
1902.50    3.376    16.81
1903.50    3.360    16.92
1904.50    3.344    17.04
1905.50    3.328    17.15
1906.50    3.312    17.27
1907.50    3.295    17.38
1908.50    3.278    17.50
1909.50    3.261    17.62
1910.50    3.244    17.74
1911.50    3.227    17.86
1912.50    3.209    17.98
1913.50    3.191    18.11
1914.50    3.173    18.23
1915.50    3.155    18.36
1916.50    3.137    18.49
1917.50    3.118    18.62
1918.50    3.099    18.75
1919.50    3.080    18.89
1920.50    3.061    19.02
1921.50    3.041    19.16
1922.50    3.022    19.30
1923.50    3.002    19.44
1924.50    2.982    19.58
1925.50    2.961    19.72
1926.50    2.940    19.87
1927.50    2.919    20.02
1928.50    2.898    20.17
1929.50    2.877    20.32
1930.50    2.855    20.48
1931.50    2.833    20.63
1932.50    2.811    20.79
1933.50    2.789    20.96
1934.50    2.766    21.12
1935.50    2.743    21.29
1936.50    2.720    21.46
1937.50    2.697    21.63
1938.50    2.673    21.81
1939.50    2.649    21.99
1940.50    2.625    22.17
1941.50    2.600    22.36
1942.50    2.576    22.55
1943.50    2.551    22.74
1944.50    2.525    22.94
1945.50    2.500    23.14
1946.50    2.474    23.35
1947.50    2.447    23.56
1948.50    2.421    23.77
1949.50    2.394    23.99
1950.50    2.367    24.22
1951.50    2.339    24.45
1952.50    2.311    24.69
1953.50    2.283    24.93
1954.50    2.255    25.17
1955.50    2.226    25.43
1956.50    2.196    25.69
1957.50    2.167    25.96
1958.50    2.137    26.23
1959.50    2.107    26.51
1960.50    2.076    26.81
1961.50    2.045    27.11
1962.50    2.014    27.41
1963.50    1.982    27.73
1964.50    1.950    28.06
1965.50    1.917    28.40
1966.50    1.884    28.76
1967.50    1.850    29.12
1968.50    1.817    29.50
1969.50    1.782    29.89
1970.50    1.747    30.30
1971.50    1.712    30.73
1972.50    1.677    31.17
1973.50    1.640    31.64
1974.50    1.604    32.12
1975.50    1.566    32.63
1976.50    1.529    33.16
1977.50    1.491    33.72
1978.50    1.452    34.31
1979.50    1.412    34.93
1980.50    1.373    35.58
1981.50    1.332    36.28
1982.50    1.291    37.02
1983.50    1.250    37.81
1984.50    1.207    38.66
1985.50    1.164    39.56
1986.50    1.121    40.54
1987.50    1.077    41.59
1988.50    1.032    42.74
1989.50    0.987    43.99
1990.50    0.941    45.36
1991.50    0.894    46.87
1992.50    0.847    48.55
1993.50    0.800    50.43
1994.50    0.752    52.55
1995.50    0.703    54.96
1996.50    0.654    57.73
1997.50    0.606    60.95
1998.50    0.557    64.72
1999.50    0.510    69.20
2000.50    0.464    74.59
2001.50    0.420    81.13
2002.50    0.381    89.11
2003.50    0.347    98.79
2004.50    0.321   110.29
2005.50    0.305   123.36
2006.50    0.301   137.31
2007.50    0.306   151.19
2008.50    0.317   164.32
2009.50    0.327   176.56
2010.50    0.331   188.25
2011.50    0.326   199.99
2012.50    0.315   212.37
2013.50    0.303   225.74
2014.50    0.298   239.91
2015.50    0.303   254.12
2016.50    0.320   267.36
2017.50    0.347   278.92
2018.50    0.382   288.57
2019.50    0.423   296.48
2020.50    0.467   302.94
2021.50    0.514   308.25
2022.50    0.563   312.65
2023.50    0.612   316.35
2024.50    0.661   319.50
2025.50    0.710   322.22
2026.50    0.759   324.58
2027.50    0.808   326.66
2028.50    0.856   328.50
2029.50    0.903   330.15
2030.50    0.950   331.63
2031.50    0.996   332.98
2032.50    1.042   334.20
2033.50    1.087   335.33
2034.50    1.131   336.36
2035.50    1.175   337.32
2036.50    1.218   338.21
2037.50    1.261   339.04
2038.50    1.302   339.81
2039.50    1.344   340.54
2040.50    1.384   341.23
2041.50    1.424   341.87
2042.50    1.464   342.48
2043.50    1.502   343.06
2044.50    1.541   343.61
2045.50    1.579   344.14
2046.50    1.616   344.64
2047.50    1.653   345.11
2048.50    1.689   345.57
2049.50    1.725   346.01
2050.50    1.760   346.43
2051.50    1.795   346.83
2052.50    1.829   347.22
2053.50    1.863   347.59
2054.50    1.897   347.95
2055.50    1.930   348.30
2056.50    1.962   348.64
2057.50    1.995   348.96
2058.50    2.027   349.28
2059.50    2.058   349.58
2060.50    2.089   349.88
2061.50    2.120   350.17
2062.50    2.150   350.45
2063.50    2.180   350.72
2064.50    2.209   350.98
2065.50    2.239   351.24
2066.50    2.268   351.49
2067.50    2.296   351.74
2068.50    2.324   351.97
2069.50    2.352   352.21
2070.50    2.380   352.43
2071.50    2.407   352.66
2072.50    2.434   352.87
2073.50    2.460   353.09
2074.50    2.486   353.30
2075.50    2.512   353.50
2076.50    2.538   353.70
2077.50    2.563   353.89
2078.50    2.588   354.09
2079.50    2.613   354.28
2080.50    2.638   354.46
2081.50    2.662   354.64
2082.50    2.686   354.82
2083.50    2.709   354.99
2084.50    2.733   355.17
2085.50    2.756   355.34
2086.50    2.779   355.50
2087.50    2.801   355.67
2088.50    2.824   355.83
2089.50    2.846   355.99
2090.50    2.868   356.14
2091.50    2.889   356.30
2092.50    2.911   356.45
2093.50    2.932   356.60
2094.50    2.952   356.74
2095.50    2.973   356.89
2096.50    2.993   357.03
2097.50    3.014   357.17
2098.50    3.033   357.31
2099.50    3.053   357.45
2100.50    3.073   357.59
2101.50    3.092   357.72
2102.50    3.111   357.85
2103.50    3.130   357.98
2104.50    3.148   358.11
2105.50    3.167   358.24
2106.50    3.185   358.37
2107.50    3.203   358.49
2108.50    3.220   358.61
2109.50    3.238   358.74
2110.50    3.255   358.86
2111.50    3.272   358.98
2112.50    3.289   359.10
2113.50    3.306   359.21
2114.50    3.322   359.33
2115.50    3.338   359.44
2116.50    3.355   359.56
2117.50    3.370   359.67
2118.50    3.386   359.78
2119.50    3.402   359.89
2120.50    3.417     0.00
2121.50    3.432     0.11
2122.50    3.447     0.22
2123.50    3.462     0.32
2124.50    3.476     0.43
2125.50    3.491     0.54
2126.50    3.505     0.64
2127.50    3.519     0.74
2128.50    3.533     0.85
2129.50    3.546     0.95
2130.50    3.560     1.05
2131.50    3.573     1.15
2132.50    3.586     1.25
2133.50    3.599     1.35
2134.50    3.612     1.44
2135.50    3.624     1.54
2136.50    3.637     1.64
2137.50    3.649     1.73
2138.50    3.661     1.83
2139.50    3.673     1.92
2140.50    3.684     2.02
2141.50    3.696     2.11
2142.50    3.707     2.20
2143.50    3.718     2.30
2144.50    3.729     2.39
2145.50    3.740     2.48
2146.50    3.751     2.57
2147.50    3.762     2.66
2148.50    3.772     2.75
2149.50    3.782     2.84
2150.50    3.792     2.93
2151.50    3.802     3.02
2152.50    3.812     3.11
2153.50    3.821     3.19
2154.50    3.831     3.28
2155.50    3.840     3.37
2156.50    3.849     3.45
2157.50    3.858     3.54
2158.50    3.867     3.62
2159.50    3.875     3.71
2160.50    3.884     3.79
2161.50    3.892     3.88
2162.50    3.900     3.96
2163.50    3.908     4.05
2164.50    3.916     4.13
2165.50    3.924     4.21
2166.50    3.931     4.29
2167.50    3.938     4.38
2168.50    3.946     4.46
2169.50    3.953     4.54
2170.50    3.960     4.62
2171.50    3.966     4.70
2172.50    3.973     4.78
2173.50    3.979     4.86
2174.50    3.986     4.94
2175.50    3.992     5.02
2176.50    3.998     5.10
2177.50    4.004     5.18
2178.50    4.009     5.26
2179.50    4.015     5.34
2180.50    4.020     5.42
2181.50    4.026     5.50
2182.50    4.031     5.58
2183.50    4.036     5.66
2184.50    4.040     5.73
2185.50    4.045     5.81
2186.50    4.050     5.89
2187.50    4.054     5.97
2188.50    4.058     6.05
2189.50    4.062     6.12
2190.50    4.066     6.20
2191.50    4.070     6.28
2192.50    4.074     6.35
2193.50    4.077     6.43
2194.50    4.081     6.51
2195.50    4.084     6.58
2196.50    4.087     6.66
2197.50    4.090     6.74
2198.50    4.093     6.81
2199.50    4.095     6.89
2200.50    4.098     6.96
2201.50    4.100     7.04
2202.50    4.102     7.12
2203.50    4.104     7.19
2204.50    4.106     7.27
2205.50    4.108     7.34
2206.50    4.110     7.42
2207.50    4.111     7.49
2208.50    4.113     7.57
2209.50    4.114     7.64
2210.50    4.115     7.72
2211.50    4.116     7.79
2212.50    4.117     7.87
2213.50    4.117     7.94
2214.50    4.118     8.02
2215.50    4.118     8.09
2216.50    4.119     8.17
2217.50    4.119     8.24
2218.50    4.119     8.32
2219.50    4.118     8.39
2220.50    4.118     8.47
2221.50    4.118     8.55
2222.50    4.117     8.62
2223.50    4.116     8.70
2224.50    4.115     8.77
2225.50    4.114     8.85
2226.50    4.113     8.92
2227.50    4.112     9.00
2228.50    4.110     9.07
2229.50    4.109     9.15
2230.50    4.107     9.22
2231.50    4.105     9.30






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 16:36:42



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