Double Star Calculator - Orbit

Orbital Elements for STT208
WDS: STT208 WDS ID/Discoverer
P: 106.350 Orbital period (years)
a: 0.337 Semi-major axis (arcseconds)
i: 22.2 Inclination (degrees)
Ω: 138.9 Longitude of ascending node (degrees)
T: 1987.370 Epoch of periastron passage (year)
e: 0.445 Eccentricity
ω: 25.6 Longitude of periastron (degrees)
Start-Year: 1971.825 Year
End-Year: 2078.175 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT208
Position: 095206.36+540351.4 Epoch-2000 right ascension and declination
WDS-ID: 09521+5404 WDS designation
Discoverer Code: STT208 Discover designation and components
ADS number: 7545 Aitken Double Star catalog
HD number: 85235 HD catalog number
Hipparcos number: 48402 Hipparcos catalog number
V1: 5.28 Magnitude of the primary
V2: 5.39 Magnitude of the secondary
Equinox: Equinox
Date: 2019 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: USN2021b Reference

Double Star Orbit for STT208



WDS 6th Orbit including measures of STT208

-- 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 STT208
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.462   323.05
--------------------------
1971.83    0.283    60.69
1972.83    0.275    64.79
1973.83    0.266    69.15
1974.83    0.258    73.79
1975.83    0.250    78.72
1976.83    0.242    83.98
1977.83    0.235    89.58
1978.83    0.228    95.55
1979.83    0.221   101.90
1980.83    0.214   108.66
1981.83    0.208   115.83
1982.83    0.202   123.42
1983.83    0.197   131.43
1984.83    0.192   139.85
1985.83    0.189   148.64
1986.83    0.186   157.75
1987.83    0.184   167.10
1988.83    0.183   176.58
1989.83    0.184   186.04
1990.83    0.186   195.36
1991.83    0.190   204.38
1992.83    0.195   212.98
1993.83    0.202   221.07
1994.83    0.210   228.62
1995.83    0.218   235.59
1996.83    0.228   242.01
1997.83    0.238   247.91
1998.83    0.248   253.32
1999.83    0.259   258.29
2000.83    0.269   262.87
2001.83    0.280   267.10
2002.83    0.291   271.01
2003.83    0.301   274.65
2004.83    0.312   278.05
2005.83    0.322   281.23
2006.83    0.332   284.21
2007.83    0.341   287.03
2008.83    0.351   289.69
2009.83    0.360   292.22
2010.83    0.368   294.62
2011.83    0.377   296.92
2012.83    0.385   299.12
2013.83    0.393   301.22
2014.83    0.400   303.25
2015.83    0.407   305.21
2016.83    0.414   307.10
2017.83    0.420   308.93
2018.83    0.426   310.71
2019.83    0.432   312.45
2020.83    0.437   314.13
2021.83    0.442   315.78
2022.83    0.447   317.39
2023.83    0.452   318.97
2024.83    0.456   320.52
2025.83    0.460   322.04
2026.83    0.463   323.54
2027.83    0.466   325.01
2028.83    0.469   326.47
2029.83    0.472   327.91
2030.83    0.474   329.34
2031.83    0.476   330.75
2032.83    0.477   332.16
2033.83    0.479   333.55
2034.83    0.480   334.94
2035.83    0.481   336.32
2036.83    0.481   337.70
2037.83    0.481   339.08
2038.83    0.481   340.45
2039.83    0.481   341.83
2040.83    0.480   343.21
2041.83    0.479   344.59
2042.83    0.478   345.98
2043.83    0.477   347.38
2044.83    0.475   348.79
2045.83    0.473   350.21
2046.83    0.471   351.64
2047.83    0.468   353.09
2048.82    0.465   354.55
2049.82    0.462   356.03
2050.82    0.459   357.53
2051.82    0.455   359.06
2052.82    0.452     0.61
2053.82    0.448     2.19
2054.82    0.443     3.79
2055.82    0.439     5.43
2056.82    0.434     7.11
2057.82    0.429     8.82
2058.82    0.423    10.57
2059.82    0.418    12.38
2060.82    0.412    14.23
2061.82    0.406    16.13
2062.82    0.400    18.09
2063.82    0.394    20.12
2064.82    0.387    22.21
2065.82    0.380    24.38
2066.82    0.373    26.63
2067.82    0.366    28.96
2068.82    0.358    31.40
2069.82    0.351    33.93
2070.82    0.343    36.58
2071.82    0.335    39.36
2072.82    0.327    42.27
2073.82    0.319    45.32
2074.82    0.311    48.54
2075.82    0.302    51.93
2076.82    0.294    55.51
2077.82    0.286    59.31






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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 16:21:48



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