Double Star Calculator - Orbit

Orbital Elements for STF2107AB
WDS: STF2107AB WDS ID/Discoverer
P: 274.088 Orbital period (years)
a: 1.03828 Semi-major axis (arcseconds)
i: 31.633 Inclination (degrees)
Ω: 45.623 Longitude of ascending node (degrees)
T: 1896.245 Epoch of periastron passage (year)
e: 0.5788 Eccentricity
ω: 250.267 Longitude of periastron (degrees)
Start-Year: 1887.95605 Year
End-Year: 2162.04395 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2107AB
Position: 165150.10+283958.7 Epoch-2000 right ascension and declination
WDS-ID: 16518+2840 WDS designation
Discoverer Code: STF2107AB Discover designation and components
ADS number: 10235 Aitken Double Star catalog
HD number: 152380 HD catalog number
Hipparcos number: 82510 Hipparcos catalog number
V1: 6.90 Magnitude of the primary
V2: 8.50 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 2 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 STF2107AB



WDS 6th Orbit including measures of STF2107AB

-- 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 STF2107AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.432   109.51
--------------------------
1887.96    0.481   246.53
1888.96    0.465   250.92
1889.96    0.450   255.62
1890.96    0.435   260.65
1891.96    0.421   266.02
1892.96    0.408   271.74
1893.96    0.397   277.81
1894.96    0.388   284.18
1895.96    0.382   290.82
1896.96    0.378   297.64
1897.96    0.376   304.57
1898.96    0.378   311.48
1899.96    0.383   318.28
1900.96    0.390   324.88
1901.96    0.400   331.19
1902.96    0.412   337.16
1903.96    0.426   342.77
1904.96    0.442   348.00
1905.96    0.459   352.85
1906.96    0.477   357.35
1907.96    0.496     1.51
1908.96    0.515     5.36
1909.96    0.535     8.93
1910.96    0.555    12.24
1911.96    0.575    15.33
1912.96    0.595    18.20
1913.96    0.615    20.89
1914.96    0.635    23.41
1915.96    0.654    25.78
1916.96    0.674    28.01
1917.96    0.693    30.11
1918.96    0.712    32.10
1919.96    0.730    33.99
1920.96    0.749    35.79
1921.96    0.767    37.50
1922.96    0.784    39.14
1923.96    0.801    40.70
1924.96    0.818    42.20
1925.96    0.835    43.64
1926.96    0.851    45.03
1927.96    0.867    46.36
1928.96    0.882    47.64
1929.96    0.898    48.88
1930.96    0.913    50.08
1931.96    0.927    51.24
1932.96    0.941    52.37
1933.96    0.955    53.46
1934.96    0.969    54.53
1935.96    0.983    55.56
1936.96    0.996    56.56
1937.96    1.008    57.54
1938.96    1.021    58.50
1939.96    1.033    59.43
1940.96    1.045    60.34
1941.96    1.057    61.23
1942.96    1.068    62.10
1943.96    1.080    62.95
1944.96    1.091    63.79
1945.96    1.101    64.61
1946.96    1.112    65.41
1947.96    1.122    66.20
1948.96    1.132    66.97
1949.96    1.142    67.73
1950.96    1.151    68.48
1951.96    1.161    69.21
1952.96    1.170    69.94
1953.96    1.179    70.65
1954.96    1.188    71.35
1955.96    1.196    72.04
1956.96    1.205    72.73
1957.96    1.213    73.40
1958.96    1.221    74.06
1959.96    1.229    74.72
1960.96    1.236    75.37
1961.96    1.244    76.01
1962.96    1.251    76.64
1963.96    1.258    77.26
1964.96    1.265    77.88
1965.96    1.272    78.49
1966.96    1.278    79.10
1967.96    1.285    79.69
1968.96    1.291    80.29
1969.96    1.297    80.88
1970.96    1.303    81.46
1971.96    1.309    82.03
1972.96    1.314    82.61
1973.96    1.320    83.17
1974.96    1.325    83.73
1975.96    1.330    84.29
1976.96    1.335    84.85
1977.96    1.340    85.40
1978.96    1.345    85.94
1979.96    1.349    86.48
1980.96    1.354    87.02
1981.96    1.358    87.56
1982.96    1.362    88.09
1983.96    1.366    88.62
1984.96    1.370    89.14
1985.96    1.374    89.66
1986.96    1.378    90.18
1987.96    1.381    90.70
1988.96    1.385    91.21
1989.96    1.388    91.72
1990.96    1.391    92.23
1991.96    1.394    92.74
1992.96    1.397    93.25
1993.96    1.400    93.75
1994.96    1.402    94.25
1995.96    1.405    94.75
1996.96    1.407    95.25
1997.96    1.410    95.74
1998.96    1.412    96.24
1999.96    1.414    96.73
2000.96    1.416    97.22
2001.96    1.418    97.71
2002.96    1.420    98.20
2003.96    1.421    98.68
2004.96    1.423    99.17
2005.96    1.424    99.65
2006.96    1.426   100.14
2007.96    1.427   100.62
2008.96    1.428   101.10
2009.96    1.429   101.59
2010.96    1.430   102.07
2011.96    1.431   102.55
2012.96    1.432   103.03
2013.96    1.432   103.51
2014.96    1.433   103.99
2015.96    1.433   104.46
2016.96    1.434   104.94
2017.96    1.434   105.42
2018.96    1.434   105.90
2019.96    1.434   106.38
2020.96    1.434   106.86
2021.96    1.434   107.33
2022.96    1.434   107.81
2023.96    1.433   108.29
2024.96    1.433   108.77
2025.96    1.432   109.25
2026.96    1.432   109.73
2027.96    1.431   110.21
2028.96    1.430   110.69
2029.96    1.429   111.17
2030.96    1.428   111.65
2031.96    1.427   112.13
2032.96    1.426   112.62
2033.96    1.425   113.10
2034.96    1.423   113.59
2035.96    1.422   114.07
2036.96    1.420   114.56
2037.96    1.419   115.05
2038.96    1.417   115.53
2039.96    1.415   116.02
2040.96    1.414   116.52
2041.96    1.412   117.01
2042.96    1.410   117.50
2043.96    1.407   118.00
2044.96    1.405   118.50
2045.96    1.403   118.99
2046.96    1.401   119.49
2047.96    1.398   120.00
2048.96    1.396   120.50
2049.96    1.393   121.01
2050.96    1.390   121.51
2051.96    1.387   122.02
2052.96    1.385   122.53
2053.96    1.382   123.05
2054.96    1.379   123.57
2055.96    1.375   124.08
2056.96    1.372   124.60
2057.96    1.369   125.13
2058.96    1.366   125.65
2059.96    1.362   126.18
2060.96    1.359   126.71
2061.96    1.355   127.25
2062.96    1.351   127.78
2063.96    1.348   128.32
2064.96    1.344   128.87
2065.96    1.340   129.41
2066.96    1.336   129.96
2067.96    1.332   130.52
2068.96    1.327   131.07
2069.96    1.323   131.63
2070.96    1.319   132.19
2071.96    1.314   132.76
2072.96    1.310   133.33
2073.96    1.305   133.91
2074.96    1.301   134.49
2075.96    1.296   135.07
2076.96    1.291   135.66
2077.96    1.286   136.25
2078.96    1.281   136.84
2079.96    1.276   137.45
2080.96    1.271   138.05
2081.96    1.266   138.66
2082.96    1.261   139.28
2083.96    1.255   139.90
2084.96    1.250   140.53
2085.96    1.244   141.16
2086.96    1.239   141.80
2087.96    1.233   142.44
2088.96    1.227   143.09
2089.96    1.221   143.75
2090.96    1.215   144.41
2091.96    1.209   145.08
2092.96    1.203   145.76
2093.96    1.197   146.44
2094.96    1.190   147.13
2095.96    1.184   147.83
2096.96    1.178   148.53
2097.96    1.171   149.24
2098.96    1.164   149.96
2099.96    1.158   150.69
2100.96    1.151   151.43
2101.96    1.144   152.18
2102.96    1.137   152.94
2103.96    1.130   153.70
2104.96    1.122   154.48
2105.96    1.115   155.26
2106.96    1.108   156.06
2107.96    1.100   156.86
2108.96    1.093   157.68
2109.96    1.085   158.51
2110.96    1.077   159.35
2111.96    1.069   160.20
2112.96    1.061   161.07
2113.96    1.053   161.95
2114.96    1.045   162.84
2115.96    1.037   163.75
2116.96    1.029   164.67
2117.96    1.020   165.61
2118.96    1.011   166.56
2119.96    1.003   167.53
2120.96    0.994   168.52
2121.96    0.985   169.52
2122.96    0.976   170.54
2123.96    0.967   171.59
2124.96    0.957   172.65
2125.96    0.948   173.73
2126.96    0.938   174.84
2127.96    0.929   175.97
2128.96    0.919   177.12
2129.96    0.909   178.29
2130.96    0.899   179.50
2131.96    0.888   180.73
2132.96    0.878   181.99
2133.96    0.867   183.28
2134.96    0.856   184.61
2135.96    0.846   185.96
2136.96    0.834   187.36
2137.96    0.823   188.79
2138.96    0.812   190.26
2139.96    0.800   191.77
2140.96    0.788   193.33
2141.96    0.776   194.94
2142.96    0.764   196.60
2143.96    0.751   198.31
2144.96    0.738   200.09
2145.96    0.725   201.92
2146.96    0.712   203.82
2147.96    0.699   205.80
2148.96    0.685   207.86
2149.96    0.671   210.00
2150.96    0.656   212.23
2151.96    0.642   214.56
2152.96    0.627   217.01
2153.96    0.612   219.57
2154.96    0.596   222.27
2155.96    0.580   225.11
2156.96    0.564   228.11
2157.96    0.548   231.29
2158.96    0.532   234.66
2159.96    0.515   238.25
2160.96    0.499   242.07
2161.96    0.483   246.15






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 17:31:27



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