Double Star Calculator - Orbit

Orbital Elements for STF1768AB
WDS: STF1768AB WDS ID/Discoverer
P: 244.980 Orbital period (years)
a: 1.00584 Semi-major axis (arcseconds)
i: 159.53 Inclination (degrees)
Ω: 64.847 Longitude of ascending node (degrees)
T: 1865.414 Epoch of periastron passage (year)
e: 0.83265 Eccentricity
ω: 140.894 Longitude of periastron (degrees)
Start-Year: 1902.5099 Year
End-Year: 2147.4901 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1768AB
Position: 133727.70+361741.4 Epoch-2000 right ascension and declination
WDS-ID: 13375+3618 WDS designation
Discoverer Code: STF1768AB Discover designation and components
ADS number: 8974 Aitken Double Star catalog
HD number: 118623 HD catalog number
Hipparcos number: 66458 Hipparcos catalog number
V1: 4.98 Magnitude of the primary
V2: 6.95 Magnitude of the secondary
Equinox: Equinox
Date: 2015 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 STF1768AB



WDS 6th Orbit including measures of STF1768AB

-- 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 STF1768AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.693    92.59
--------------------------
1902.51    1.108   130.41
1903.51    1.125   129.79
1904.51    1.142   129.19
1905.51    1.159   128.61
1906.51    1.176   128.04
1907.51    1.192   127.49
1908.51    1.208   126.96
1909.51    1.224   126.44
1910.51    1.239   125.93
1911.51    1.255   125.43
1912.51    1.270   124.95
1913.51    1.284   124.47
1914.51    1.298   124.01
1915.51    1.313   123.56
1916.51    1.326   123.12
1917.51    1.340   122.68
1918.51    1.353   122.26
1919.51    1.366   121.84
1920.51    1.379   121.43
1921.51    1.392   121.03
1922.51    1.404   120.63
1923.51    1.416   120.25
1924.51    1.428   119.87
1925.51    1.440   119.49
1926.51    1.451   119.12
1927.51    1.463   118.76
1928.51    1.474   118.40
1929.51    1.485   118.05
1930.51    1.495   117.70
1931.51    1.506   117.36
1932.51    1.516   117.02
1933.51    1.526   116.69
1934.51    1.536   116.36
1935.51    1.545   116.03
1936.51    1.555   115.71
1937.51    1.564   115.39
1938.51    1.573   115.08
1939.51    1.582   114.77
1940.51    1.590   114.46
1941.51    1.599   114.16
1942.51    1.607   113.86
1943.51    1.615   113.56
1944.51    1.623   113.27
1945.51    1.630   112.98
1946.51    1.638   112.69
1947.51    1.645   112.40
1948.51    1.652   112.12
1949.51    1.659   111.84
1950.51    1.666   111.56
1951.51    1.673   111.28
1952.51    1.679   111.01
1953.51    1.685   110.73
1954.51    1.691   110.46
1955.51    1.697   110.19
1956.51    1.703   109.93
1957.51    1.708   109.66
1958.51    1.714   109.40
1959.51    1.719   109.14
1960.51    1.724   108.88
1961.51    1.729   108.62
1962.51    1.734   108.36
1963.51    1.738   108.10
1964.51    1.743   107.85
1965.51    1.747   107.60
1966.51    1.751   107.34
1967.51    1.755   107.09
1968.51    1.758   106.84
1969.51    1.762   106.59
1970.51    1.765   106.35
1971.51    1.768   106.10
1972.51    1.771   105.85
1973.51    1.774   105.61
1974.51    1.777   105.36
1975.51    1.780   105.12
1976.51    1.782   104.88
1977.51    1.784   104.63
1978.51    1.786   104.39
1979.51    1.788   104.15
1980.51    1.790   103.91
1981.51    1.792   103.67
1982.51    1.793   103.43
1983.51    1.794   103.19
1984.51    1.795   102.95
1985.51    1.796   102.71
1986.51    1.797   102.47
1987.51    1.798   102.23
1988.51    1.798   101.99
1989.51    1.799   101.75
1990.51    1.799   101.52
1991.51    1.799   101.28
1992.51    1.798   101.04
1993.51    1.798   100.80
1994.51    1.798   100.56
1995.51    1.797   100.32
1996.51    1.796   100.08
1997.51    1.795    99.84
1998.51    1.794    99.61
1999.51    1.793    99.37
2000.51    1.791    99.13
2001.51    1.789    98.88
2002.51    1.788    98.64
2003.51    1.786    98.40
2004.51    1.784    98.16
2005.51    1.781    97.92
2006.51    1.779    97.67
2007.51    1.776    97.43
2008.51    1.773    97.18
2009.51    1.770    96.94
2010.51    1.767    96.69
2011.51    1.764    96.44
2012.51    1.760    96.20
2013.51    1.757    95.95
2014.51    1.753    95.70
2015.51    1.749    95.44
2016.51    1.745    95.19
2017.51    1.740    94.94
2018.51    1.736    94.68
2019.51    1.731    94.43
2020.51    1.726    94.17
2021.51    1.721    93.91
2022.51    1.716    93.65
2023.51    1.711    93.38
2024.51    1.705    93.12
2025.51    1.699    92.85
2026.51    1.693    92.59
2027.51    1.687    92.32
2028.51    1.681    92.04
2029.51    1.674    91.77
2030.51    1.667    91.49
2031.51    1.661    91.21
2032.51    1.653    90.93
2033.51    1.646    90.65
2034.51    1.639    90.36
2035.51    1.631    90.08
2036.51    1.623    89.78
2037.51    1.615    89.49
2038.51    1.607    89.19
2039.51    1.598    88.89
2040.51    1.589    88.59
2041.51    1.580    88.28
2042.51    1.571    87.97
2043.51    1.562    87.66
2044.51    1.552    87.34
2045.51    1.543    87.02
2046.51    1.533    86.69
2047.51    1.522    86.36
2048.51    1.512    86.02
2049.51    1.501    85.68
2050.51    1.490    85.34
2051.51    1.479    84.99
2052.51    1.468    84.63
2053.51    1.456    84.27
2054.51    1.444    83.91
2055.51    1.432    83.53
2056.51    1.419    83.15
2057.51    1.407    82.77
2058.51    1.394    82.37
2059.51    1.380    81.97
2060.51    1.367    81.56
2061.51    1.353    81.15
2062.51    1.339    80.72
2063.51    1.325    80.29
2064.51    1.310    79.84
2065.51    1.295    79.39
2066.51    1.280    78.92
2067.51    1.264    78.44
2068.51    1.248    77.96
2069.51    1.232    77.45
2070.51    1.215    76.94
2071.51    1.198    76.41
2072.51    1.181    75.86
2073.51    1.163    75.30
2074.51    1.145    74.72
2075.51    1.127    74.13
2076.51    1.108    73.51
2077.51    1.089    72.87
2078.51    1.069    72.21
2079.51    1.049    71.52
2080.51    1.029    70.80
2081.51    1.008    70.06
2082.51    0.986    69.28
2083.51    0.964    68.47
2084.51    0.942    67.62
2085.51    0.918    66.73
2086.51    0.895    65.79
2087.51    0.871    64.80
2088.51    0.846    63.76
2089.51    0.820    62.64
2090.51    0.794    61.46
2091.51    0.768    60.20
2092.51    0.740    58.84
2093.51    0.712    57.37
2094.51    0.683    55.79
2095.51    0.653    54.05
2096.51    0.622    52.15
2097.51    0.590    50.05
2098.51    0.557    47.70
2099.51    0.523    45.06
2100.51    0.488    42.03
2101.51    0.452    38.54
2102.51    0.414    34.42
2103.51    0.376    29.46
2104.51    0.336    23.36
2105.51    0.296    15.62
2106.51    0.256     5.44
2107.51    0.218   351.62
2108.51    0.187   332.57
2109.51    0.167   307.42
2110.51    0.165   278.85
2111.51    0.180   252.47
2112.51    0.205   231.44
2113.51    0.236   215.50
2114.51    0.270   203.40
2115.51    0.304   194.00
2116.51    0.339   186.51
2117.51    0.373   180.39
2118.51    0.406   175.29
2119.51    0.439   170.96
2120.51    0.471   167.23
2121.51    0.502   163.97
2122.51    0.532   161.08
2123.51    0.562   158.50
2124.51    0.591   156.18
2125.51    0.619   154.07
2126.51    0.647   152.15
2127.51    0.674   150.38
2128.51    0.700   148.74
2129.51    0.726   147.23
2130.51    0.751   145.81
2131.51    0.776   144.49
2132.51    0.800   143.25
2133.51    0.823   142.08
2134.51    0.846   140.97
2135.51    0.869   139.92
2136.51    0.891   138.92
2137.51    0.913   137.98
2138.51    0.934   137.07
2139.51    0.955   136.21
2140.51    0.975   135.38
2141.51    0.996   134.59
2142.51    1.015   133.82
2143.51    1.034   133.09
2144.51    1.053   132.38
2145.51    1.072   131.70
2146.51    1.090   131.04






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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.


Report Information
Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 16:58:17



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