Double Star Calculator - Orbit

Orbital Elements for STT213AB
WDS: STT213AB WDS ID/Discoverer
P: 206.200 Orbital period (years)
a: 0.924 Semi-major axis (arcseconds)
i: 126.8 Inclination (degrees)
Ω: 59.0 Longitude of ascending node (degrees)
T: 1939.520 Epoch of periastron passage (year)
e: 0.958 Eccentricity
ω: 111.1 Longitude of periastron (degrees)
Start-Year: 1921.9 Year
End-Year: 2128.1 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT213AB
Position: 101308.88+272510.5 Epoch-2000 right ascension and declination
WDS-ID: 10131+2725 WDS designation
Discoverer Code: STT213AB Discover designation and components
ADS number: 7685 Aitken Double Star catalog
HD number: 88533 HD catalog number
Hipparcos number: 50052 Hipparcos catalog number
V1: 8.62 Magnitude of the primary
V2: 9.83 Magnitude of the secondary
Equinox: Equinox
Date: 2022 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: Lin2022b Reference

Double Star Orbit for STT213AB



WDS 6th Orbit including measures of STT213AB

-- 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 STT213AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.163   119.15
--------------------------
1921.90    0.669    95.38
1922.90    0.650    94.79
1923.90    0.629    94.17
1924.90    0.608    93.50
1925.90    0.586    92.78
1926.90    0.563    92.00
1927.90    0.538    91.16
1928.90    0.513    90.23
1929.90    0.486    89.20
1930.90    0.457    88.05
1931.90    0.427    86.74
1932.90    0.394    85.22
1933.90    0.359    83.41
1934.90    0.320    81.19
1935.90    0.277    78.30
1936.90    0.227    74.25
1937.90    0.166    67.55
1938.90    0.083    49.84
1939.90    0.062   234.46
1940.90    0.117   201.25
1941.90    0.155   187.19
1942.90    0.188   178.41
1943.90    0.218   172.18
1944.90    0.246   167.42
1945.90    0.273   163.61
1946.90    0.299   160.48
1947.90    0.323   157.82
1948.90    0.346   155.54
1949.90    0.369   153.53
1950.90    0.391   151.76
1951.90    0.412   150.17
1952.90    0.432   148.73
1953.90    0.452   147.42
1954.90    0.472   146.22
1955.90    0.490   145.12
1956.90    0.509   144.09
1957.90    0.527   143.13
1958.90    0.544   142.24
1959.90    0.561   141.40
1960.90    0.578   140.61
1961.90    0.594   139.86
1962.90    0.610   139.16
1963.90    0.625   138.49
1964.90    0.640   137.85
1965.90    0.655   137.24
1966.90    0.670   136.65
1967.90    0.684   136.09
1968.90    0.698   135.56
1969.90    0.712   135.04
1970.90    0.725   134.55
1971.90    0.738   134.07
1972.90    0.751   133.61
1973.90    0.764   133.16
1974.90    0.776   132.73
1975.90    0.788   132.31
1976.90    0.800   131.90
1977.90    0.812   131.51
1978.90    0.823   131.13
1979.90    0.834   130.75
1980.90    0.846   130.39
1981.90    0.856   130.04
1982.90    0.867   129.69
1983.90    0.877   129.35
1984.90    0.888   129.03
1985.90    0.898   128.70
1986.90    0.907   128.39
1987.90    0.917   128.08
1988.90    0.926   127.78
1989.90    0.936   127.48
1990.90    0.945   127.20
1991.90    0.954   126.91
1992.90    0.962   126.63
1993.90    0.971   126.36
1994.90    0.979   126.09
1995.90    0.987   125.82
1996.90    0.995   125.56
1997.90    1.003   125.31
1998.90    1.011   125.05
1999.90    1.018   124.81
2000.90    1.026   124.56
2001.90    1.033   124.32
2002.90    1.040   124.08
2003.90    1.047   123.85
2004.90    1.054   123.61
2005.90    1.060   123.38
2006.90    1.067   123.16
2007.90    1.073   122.93
2008.90    1.079   122.71
2009.90    1.085   122.49
2010.90    1.091   122.28
2011.90    1.097   122.06
2012.90    1.102   121.85
2013.90    1.108   121.64
2014.90    1.113   121.43
2015.90    1.118   121.23
2016.90    1.123   121.03
2017.90    1.128   120.82
2018.90    1.132   120.62
2019.90    1.137   120.42
2020.90    1.141   120.23
2021.90    1.146   120.03
2022.90    1.150   119.84
2023.90    1.154   119.64
2024.90    1.158   119.45
2025.90    1.161   119.26
2026.90    1.165   119.07
2027.90    1.168   118.88
2028.90    1.171   118.70
2029.90    1.175   118.51
2030.90    1.178   118.33
2031.90    1.181   118.14
2032.90    1.183   117.96
2033.90    1.186   117.78
2034.90    1.188   117.59
2035.90    1.191   117.41
2036.90    1.193   117.23
2037.90    1.195   117.05
2038.90    1.197   116.87
2039.90    1.199   116.70
2040.90    1.200   116.52
2041.90    1.202   116.34
2042.90    1.203   116.16
2043.90    1.204   115.99
2044.90    1.205   115.81
2045.90    1.206   115.63
2046.90    1.207   115.46
2047.90    1.208   115.28
2048.90    1.208   115.11
2049.90    1.209   114.93
2050.90    1.209   114.76
2051.90    1.209   114.58
2052.90    1.209   114.41
2053.90    1.209   114.23
2054.90    1.209   114.06
2055.90    1.208   113.88
2056.90    1.208   113.70
2057.90    1.207   113.53
2058.90    1.206   113.35
2059.90    1.205   113.18
2060.90    1.204   113.00
2061.90    1.203   112.82
2062.90    1.201   112.65
2063.90    1.199   112.47
2064.90    1.198   112.29
2065.90    1.196   112.11
2066.90    1.194   111.93
2067.90    1.191   111.75
2068.90    1.189   111.57
2069.90    1.187   111.39
2070.90    1.184   111.21
2071.90    1.181   111.02
2072.90    1.178   110.84
2073.90    1.175   110.66
2074.90    1.172   110.47
2075.90    1.168   110.28
2076.90    1.164   110.09
2077.90    1.161   109.90
2078.90    1.157   109.71
2079.90    1.152   109.52
2080.90    1.148   109.33
2081.90    1.144   109.13
2082.90    1.139   108.94
2083.90    1.134   108.74
2084.90    1.129   108.54
2085.90    1.124   108.34
2086.90    1.118   108.13
2087.90    1.113   107.93
2088.90    1.107   107.72
2089.90    1.101   107.51
2090.90    1.095   107.30
2091.90    1.088   107.08
2092.90    1.082   106.86
2093.90    1.075   106.64
2094.90    1.068   106.42
2095.90    1.061   106.20
2096.90    1.053   105.97
2097.90    1.046   105.73
2098.90    1.038   105.50
2099.90    1.030   105.26
2100.90    1.021   105.01
2101.90    1.013   104.77
2102.90    1.004   104.52
2103.90    0.995   104.26
2104.90    0.985   104.00
2105.90    0.976   103.73
2106.90    0.966   103.46
2107.90    0.955   103.18
2108.90    0.945   102.90
2109.90    0.934   102.61
2110.90    0.923   102.31
2111.90    0.912   102.01
2112.90    0.900   101.69
2113.90    0.888   101.37
2114.90    0.875   101.04
2115.90    0.862   100.71
2116.90    0.849   100.36
2117.90    0.836    99.99
2118.90    0.822    99.62
2119.90    0.807    99.24
2120.90    0.792    98.84
2121.90    0.777    98.42
2122.90    0.761    97.99
2123.90    0.745    97.53
2124.90    0.728    97.06
2125.90    0.710    96.57
2126.90    0.692    96.05
2127.90    0.673    95.50






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 16:25:24



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