Double Star Calculator - Orbit

Orbital Elements for STF2438
WDS: STF2438 WDS ID/Discoverer
P: 261.600 Orbital period (years)
a: 1.051 Semi-major axis (arcseconds)
i: 114.1 Inclination (degrees)
Ω: 257.8 Longitude of ascending node (degrees)
T: 1885.890 Epoch of periastron passage (year)
e: 0.98 Eccentricity
ω: 86.0 Longitude of periastron (degrees)
Start-Year: 1894.2 Year
End-Year: 2155.8 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2438
Position: 185728.47+581330.0 Epoch-2000 right ascension and declination
WDS-ID: 18575+5814 WDS designation
Discoverer Code: STF2438 Discover designation and components
ADS number: 11897 Aitken Double Star catalog
HD number: 176560 HD catalog number
Hipparcos number: 93068 Hipparcos catalog number
V1: 7.01 Magnitude of the primary
V2: 7.44 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 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: USN2018 Reference

Double Star Orbit for STF2438



WDS 6th Orbit including measures of STF2438

-- 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 STF2438
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.854   355.87
--------------------------
1894.20    0.295    34.87
1895.20    0.312    33.54
1896.20    0.328    32.33
1897.20    0.344    31.24
1898.20    0.358    30.23
1899.20    0.372    29.31
1900.20    0.386    28.45
1901.20    0.398    27.64
1902.20    0.411    26.89
1903.20    0.423    26.18
1904.20    0.434    25.51
1905.20    0.446    24.87
1906.20    0.457    24.26
1907.20    0.467    23.68
1908.20    0.477    23.13
1909.20    0.487    22.60
1910.20    0.497    22.09
1911.20    0.506    21.60
1912.20    0.516    21.12
1913.20    0.525    20.67
1914.20    0.533    20.23
1915.20    0.542    19.80
1916.20    0.550    19.38
1917.20    0.558    18.98
1918.20    0.566    18.59
1919.20    0.574    18.21
1920.20    0.582    17.84
1921.20    0.589    17.48
1922.20    0.596    17.13
1923.20    0.604    16.79
1924.20    0.611    16.45
1925.20    0.617    16.12
1926.20    0.624    15.80
1927.20    0.631    15.49
1928.20    0.637    15.18
1929.20    0.643    14.88
1930.20    0.649    14.58
1931.20    0.655    14.29
1932.20    0.661    14.01
1933.20    0.667    13.73
1934.20    0.673    13.45
1935.20    0.678    13.18
1936.20    0.684    12.92
1937.20    0.689    12.65
1938.20    0.694    12.40
1939.20    0.699    12.14
1940.20    0.704    11.89
1941.20    0.709    11.64
1942.20    0.714    11.40
1943.20    0.719    11.16
1944.20    0.723    10.92
1945.20    0.728    10.69
1946.20    0.732    10.45
1947.20    0.736    10.22
1948.20    0.741    10.00
1949.20    0.745     9.77
1950.20    0.749     9.55
1951.20    0.753     9.33
1952.20    0.757     9.12
1953.20    0.760     8.90
1954.20    0.764     8.69
1955.20    0.768     8.48
1956.20    0.771     8.27
1957.20    0.775     8.06
1958.20    0.778     7.86
1959.20    0.782     7.66
1960.20    0.785     7.45
1961.20    0.788     7.25
1962.20    0.791     7.06
1963.20    0.794     6.86
1964.20    0.797     6.66
1965.20    0.800     6.47
1966.20    0.803     6.28
1967.20    0.805     6.09
1968.20    0.808     5.90
1969.20    0.811     5.71
1970.20    0.813     5.52
1971.20    0.815     5.34
1972.20    0.818     5.15
1973.20    0.820     4.97
1974.20    0.822     4.78
1975.20    0.825     4.60
1976.20    0.827     4.42
1977.20    0.829     4.24
1978.20    0.831     4.06
1979.20    0.833     3.88
1980.20    0.834     3.70
1981.20    0.836     3.53
1982.20    0.838     3.35
1983.20    0.839     3.17
1984.20    0.841     3.00
1985.20    0.843     2.82
1986.20    0.844     2.65
1987.20    0.845     2.48
1988.20    0.847     2.31
1989.20    0.848     2.13
1990.20    0.849     1.96
1991.20    0.850     1.79
1992.20    0.852     1.62
1993.20    0.853     1.45
1994.20    0.854     1.28
1995.20    0.854     1.11
1996.20    0.855     0.94
1997.20    0.856     0.77
1998.20    0.857     0.61
1999.20    0.858     0.44
2000.20    0.858     0.27
2001.20    0.859     0.10
2002.20    0.859   359.93
2003.20    0.860   359.77
2004.20    0.860   359.60
2005.20    0.860   359.43
2006.20    0.861   359.27
2007.20    0.861   359.10
2008.20    0.861   358.93
2009.20    0.861   358.77
2010.20    0.861   358.60
2011.20    0.861   358.43
2012.20    0.861   358.27
2013.20    0.861   358.10
2014.20    0.861   357.93
2015.20    0.860   357.77
2016.20    0.860   357.60
2017.20    0.860   357.43
2018.20    0.859   357.27
2019.20    0.859   357.10
2020.20    0.858   356.93
2021.20    0.858   356.76
2022.20    0.857   356.59
2023.20    0.856   356.43
2024.20    0.856   356.26
2025.20    0.855   356.09
2026.20    0.854   355.92
2027.20    0.853   355.75
2028.20    0.852   355.58
2029.20    0.851   355.41
2030.20    0.850   355.24
2031.20    0.849   355.07
2032.20    0.848   354.90
2033.20    0.846   354.72
2034.20    0.845   354.55
2035.20    0.844   354.38
2036.20    0.842   354.20
2037.20    0.841   354.03
2038.20    0.839   353.86
2039.20    0.838   353.68
2040.20    0.836   353.50
2041.20    0.834   353.33
2042.20    0.832   353.15
2043.20    0.831   352.97
2044.20    0.829   352.79
2045.20    0.827   352.61
2046.20    0.825   352.43
2047.20    0.823   352.25
2048.20    0.821   352.06
2049.20    0.818   351.88
2050.20    0.816   351.69
2051.20    0.814   351.51
2052.20    0.811   351.32
2053.20    0.809   351.13
2054.20    0.806   350.94
2055.20    0.804   350.75
2056.20    0.801   350.56
2057.20    0.799   350.37
2058.20    0.796   350.17
2059.20    0.793   349.98
2060.20    0.790   349.78
2061.20    0.787   349.58
2062.20    0.784   349.38
2063.20    0.781   349.18
2064.20    0.778   348.98
2065.20    0.775   348.77
2066.20    0.772   348.57
2067.20    0.768   348.36
2068.20    0.765   348.15
2069.20    0.761   347.94
2070.20    0.758   347.72
2071.20    0.754   347.51
2072.20    0.751   347.29
2073.20    0.747   347.07
2074.20    0.743   346.84
2075.20    0.739   346.62
2076.20    0.735   346.39
2077.20    0.731   346.16
2078.20    0.727   345.93
2079.20    0.723   345.70
2080.20    0.719   345.46
2081.20    0.714   345.22
2082.20    0.710   344.97
2083.20    0.705   344.73
2084.20    0.701   344.48
2085.20    0.696   344.22
2086.20    0.691   343.97
2087.20    0.687   343.71
2088.20    0.682   343.44
2089.20    0.677   343.18
2090.20    0.672   342.90
2091.20    0.667   342.63
2092.20    0.661   342.35
2093.20    0.656   342.06
2094.20    0.651   341.77
2095.20    0.645   341.48
2096.20    0.640   341.18
2097.20    0.634   340.88
2098.20    0.628   340.57
2099.20    0.622   340.25
2100.20    0.616   339.93
2101.20    0.610   339.60
2102.20    0.604   339.26
2103.20    0.598   338.92
2104.20    0.591   338.57
2105.20    0.585   338.21
2106.20    0.578   337.85
2107.20    0.571   337.48
2108.20    0.564   337.09
2109.20    0.557   336.70
2110.20    0.550   336.30
2111.20    0.543   335.88
2112.20    0.536   335.46
2113.20    0.528   335.02
2114.20    0.520   334.57
2115.20    0.513   334.11
2116.20    0.505   333.63
2117.20    0.497   333.14
2118.20    0.488   332.63
2119.20    0.480   332.10
2120.20    0.471   331.56
2121.20    0.462   330.99
2122.20    0.453   330.40
2123.20    0.444   329.79
2124.20    0.435   329.15
2125.20    0.425   328.48
2126.20    0.415   327.78
2127.20    0.405   327.04
2128.20    0.395   326.27
2129.20    0.384   325.46
2130.20    0.373   324.60
2131.20    0.362   323.68
2132.20    0.350   322.71
2133.20    0.338   321.66
2134.20    0.326   320.54
2135.20    0.313   319.33
2136.20    0.300   318.02
2137.20    0.286   316.58
2138.20    0.272   314.99
2139.20    0.256   313.22
2140.20    0.240   311.21
2141.20    0.223   308.92
2142.20    0.205   306.22
2143.20    0.185   302.98
2144.20    0.163   298.90
2145.20    0.137   293.42
2146.20    0.105   284.97
2147.20    0.049   263.59
2148.20    0.085    63.71
2149.20    0.135    53.33
2150.20    0.170    47.98
2151.20    0.198    44.32
2152.20    0.223    41.53
2153.20    0.245    39.28
2154.20    0.266    37.39
2155.20    0.285    35.76






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 17:57:42



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