Double Star Calculator - Orbit

Orbital Elements for STT218
WDS: STT218 WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 0.725 Semi-major axis (arcseconds)
i: 50.4 Inclination (degrees)
Ω: 41.6 Longitude of ascending node (degrees)
T: 2038.910 Epoch of periastron passage (year)
e: 0.645 Eccentricity
ω: 221.8 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT218
Position: 102730.21+033348.7 Epoch-2000 right ascension and declination
WDS-ID: 10275+0334 WDS designation
Discoverer Code: STT218 Discover designation and components
ADS number: 7779 Aitken Double Star catalog
HD number: 90572 HD catalog number
Hipparcos number: 51204 Hipparcos catalog number
V1: 7.44 Magnitude of the primary
V2: 9.60 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2021 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2023a Reference

Double Star Orbit for STT218



WDS 6th Orbit including measures of STT218

-- 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 STT218
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.325   201.28
--------------------------
1875.00    1.050    67.31
1876.00    1.048    67.59
1877.00    1.047    67.87
1878.00    1.045    68.15
1879.00    1.044    68.43
1880.00    1.042    68.71
1881.00    1.040    69.00
1882.00    1.038    69.28
1883.00    1.036    69.57
1884.00    1.034    69.85
1885.00    1.032    70.14
1886.00    1.030    70.43
1887.00    1.028    70.72
1888.00    1.026    71.01
1889.00    1.023    71.31
1890.00    1.021    71.60
1891.00    1.018    71.90
1892.00    1.015    72.19
1893.00    1.013    72.49
1894.00    1.010    72.79
1895.00    1.007    73.09
1896.00    1.004    73.40
1897.00    1.001    73.70
1898.00    0.998    74.01
1899.00    0.995    74.32
1900.00    0.992    74.63
1901.00    0.989    74.94
1902.00    0.985    75.26
1903.00    0.982    75.58
1904.00    0.979    75.90
1905.00    0.975    76.22
1906.00    0.971    76.54
1907.00    0.968    76.87
1908.00    0.964    77.20
1909.00    0.960    77.53
1910.00    0.956    77.87
1911.00    0.952    78.20
1912.00    0.948    78.54
1913.00    0.944    78.89
1914.00    0.940    79.23
1915.00    0.936    79.58
1916.00    0.932    79.93
1917.00    0.928    80.29
1918.00    0.923    80.65
1919.00    0.919    81.01
1920.00    0.914    81.38
1921.00    0.910    81.75
1922.00    0.905    82.12
1923.00    0.900    82.50
1924.00    0.896    82.88
1925.00    0.891    83.26
1926.00    0.886    83.65
1927.00    0.881    84.05
1928.00    0.876    84.44
1929.00    0.871    84.85
1930.00    0.866    85.25
1931.00    0.861    85.67
1932.00    0.856    86.08
1933.00    0.850    86.51
1934.00    0.845    86.93
1935.00    0.840    87.37
1936.00    0.834    87.80
1937.00    0.829    88.25
1938.00    0.823    88.70
1939.00    0.818    89.16
1940.00    0.812    89.62
1941.00    0.806    90.09
1942.00    0.801    90.56
1943.00    0.795    91.05
1944.00    0.789    91.54
1945.00    0.783    92.03
1946.00    0.777    92.54
1947.00    0.771    93.05
1948.00    0.765    93.57
1949.00    0.759    94.10
1950.00    0.753    94.64
1951.00    0.747    95.18
1952.00    0.741    95.74
1953.00    0.734    96.31
1954.00    0.728    96.88
1955.00    0.722    97.46
1956.00    0.716    98.06
1957.00    0.709    98.66
1958.00    0.703    99.28
1959.00    0.696    99.91
1960.00    0.690   100.55
1961.00    0.683   101.20
1962.00    0.677   101.86
1963.00    0.670   102.54
1964.00    0.664   103.23
1965.00    0.657   103.94
1966.00    0.650   104.66
1967.00    0.644   105.39
1968.00    0.637   106.14
1969.00    0.630   106.90
1970.00    0.624   107.69
1971.00    0.617   108.48
1972.00    0.610   109.30
1973.00    0.604   110.14
1974.00    0.597   110.99
1975.00    0.590   111.86
1976.00    0.583   112.75
1977.00    0.577   113.67
1978.00    0.570   114.60
1979.00    0.563   115.56
1980.00    0.556   116.54
1981.00    0.550   117.54
1982.00    0.543   118.57
1983.00    0.537   119.63
1984.00    0.530   120.71
1985.00    0.523   121.82
1986.00    0.517   122.95
1987.00    0.510   124.12
1988.00    0.504   125.31
1989.00    0.498   126.54
1990.00    0.491   127.79
1991.00    0.485   129.08
1992.00    0.479   130.41
1993.00    0.473   131.76
1994.00    0.467   133.16
1995.00    0.461   134.59
1996.00    0.455   136.05
1997.00    0.449   137.56
1998.00    0.443   139.10
1999.00    0.438   140.68
2000.00    0.432   142.31
2001.00    0.427   143.97
2002.00    0.422   145.68
2003.00    0.417   147.43
2004.00    0.412   149.22
2005.00    0.407   151.05
2006.00    0.402   152.93
2007.00    0.398   154.85
2008.00    0.393   156.81
2009.00    0.389   158.82
2010.00    0.385   160.87
2011.00    0.381   162.97
2012.00    0.377   165.11
2013.00    0.373   167.29
2014.00    0.370   169.52
2015.00    0.366   171.79
2016.00    0.363   174.10
2017.00    0.359   176.46
2018.00    0.356   178.86
2019.00    0.353   181.30
2020.00    0.350   183.79
2021.00    0.346   186.33
2022.00    0.343   188.92
2023.00    0.339   191.56
2024.00    0.336   194.25
2025.00    0.332   197.01
2026.00    0.328   199.84
2027.00    0.323   202.74
2028.00    0.318   205.73
2029.00    0.312   208.82
2030.00    0.306   212.03
2031.00    0.300   215.38
2032.00    0.292   218.89
2033.00    0.284   222.59
2034.00    0.274   226.54
2035.00    0.265   230.77
2036.00    0.254   235.34
2037.00    0.243   240.33
2038.00    0.231   245.80
2039.00    0.220   251.85
2040.00    0.209   258.54
2041.00    0.199   265.92
2042.00    0.191   273.99
2043.00    0.186   282.65
2044.00    0.183   291.71
2045.00    0.184   300.87
2046.00    0.188   309.81
2047.00    0.195   318.26
2048.00    0.204   326.01
2049.00    0.216   332.98
2050.00    0.230   339.17
2051.00    0.245   344.62
2052.00    0.261   349.42
2053.00    0.278   353.65
2054.00    0.295   357.39
2055.00    0.313     0.72
2056.00    0.331     3.69
2057.00    0.348     6.36
2058.00    0.366     8.77
2059.00    0.383    10.96
2060.00    0.401    12.96
2061.00    0.418    14.80
2062.00    0.434    16.49
2063.00    0.451    18.06
2064.00    0.467    19.52
2065.00    0.483    20.88
2066.00    0.499    22.16
2067.00    0.514    23.35
2068.00    0.529    24.48
2069.00    0.544    25.55
2070.00    0.558    26.56
2071.00    0.572    27.53
2072.00    0.586    28.44
2073.00    0.600    29.32
2074.00    0.613    30.15
2075.00    0.626    30.95
2076.00    0.638    31.72
2077.00    0.651    32.46
2078.00    0.663    33.18
2079.00    0.675    33.86
2080.00    0.686    34.53
2081.00    0.698    35.17
2082.00    0.709    35.79
2083.00    0.720    36.39
2084.00    0.730    36.98
2085.00    0.741    37.54
2086.00    0.751    38.10
2087.00    0.761    38.64
2088.00    0.770    39.16
2089.00    0.780    39.67
2090.00    0.789    40.17
2091.00    0.798    40.66
2092.00    0.807    41.14
2093.00    0.816    41.60
2094.00    0.824    42.06
2095.00    0.832    42.51
2096.00    0.840    42.95
2097.00    0.848    43.38
2098.00    0.856    43.80
2099.00    0.863    44.22
2100.00    0.871    44.63
2101.00    0.878    45.03
2102.00    0.885    45.42
2103.00    0.892    45.81
2104.00    0.898    46.20
2105.00    0.905    46.57
2106.00    0.911    46.95
2107.00    0.917    47.31
2108.00    0.923    47.68
2109.00    0.929    48.04
2110.00    0.935    48.39
2111.00    0.940    48.74
2112.00    0.946    49.08
2113.00    0.951    49.43
2114.00    0.956    49.76
2115.00    0.961    50.10
2116.00    0.966    50.43
2117.00    0.970    50.76
2118.00    0.975    51.08
2119.00    0.979    51.40
2120.00    0.984    51.72
2121.00    0.988    52.04
2122.00    0.992    52.35
2123.00    0.996    52.66
2124.00    0.999    52.97
2125.00    1.003    53.28
2126.00    1.007    53.58
2127.00    1.010    53.89
2128.00    1.013    54.19
2129.00    1.016    54.48
2130.00    1.019    54.78
2131.00    1.022    55.08
2132.00    1.025    55.37
2133.00    1.028    55.66
2134.00    1.030    55.95
2135.00    1.033    56.24
2136.00    1.035    56.53
2137.00    1.037    56.81
2138.00    1.039    57.10
2139.00    1.041    57.38
2140.00    1.043    57.66
2141.00    1.045    57.95
2142.00    1.047    58.23
2143.00    1.049    58.51
2144.00    1.050    58.79
2145.00    1.051    59.06
2146.00    1.053    59.34
2147.00    1.054    59.62
2148.00    1.055    59.90
2149.00    1.056    60.17
2150.00    1.057    60.45
2151.00    1.058    60.72
2152.00    1.058    61.00
2153.00    1.059    61.27
2154.00    1.059    61.54
2155.00    1.060    61.82
2156.00    1.060    62.09
2157.00    1.060    62.36
2158.00    1.061    62.64
2159.00    1.061    62.91
2160.00    1.061    63.18
2161.00    1.060    63.46
2162.00    1.060    63.73
2163.00    1.060    64.00
2164.00    1.060    64.28
2165.00    1.059    64.55
2166.00    1.059    64.82
2167.00    1.058    65.10
2168.00    1.057    65.37
2169.00    1.056    65.65
2170.00    1.055    65.92
2171.00    1.054    66.20
2172.00    1.053    66.48
2173.00    1.052    66.75
2174.00    1.051    67.03






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 16:28:01



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