Double Star Calculator - Orbit

Orbital Elements for RST33AB
WDS: RST33AB WDS ID/Discoverer
P: 175.338 Orbital period (years)
a: 0.91477 Semi-major axis (arcseconds)
i: 123.438 Inclination (degrees)
Ω: 155.63 Longitude of ascending node (degrees)
T: 1951.475 Epoch of periastron passage (year)
e: 0.79785 Eccentricity
ω: 67.124 Longitude of periastron (degrees)
Start-Year: 1937.33105 Year
End-Year: 2112.66895 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for RST33AB
Position: 012556.10-475355.9 Epoch-2000 right ascension and declination
WDS-ID: 01259-4754 WDS designation
Discoverer Code: RST33AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 8821 HD catalog number
Hipparcos number: 6693 Hipparcos catalog number
V1: 8.13 Magnitude of the primary
V2: 9.77 Magnitude of the secondary
Equinox: Equinox
Date: 2010 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for RST33AB



WDS 6th Orbit including measures of RST33AB

-- 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 RST33AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.093   289.32
--------------------------
1937.33    0.462   203.95
1938.33    0.451   201.21
1939.33    0.439   198.33
1940.33    0.427   195.29
1941.33    0.414   192.07
1942.33    0.401   188.63
1943.33    0.386   184.94
1944.33    0.369   180.93
1945.33    0.350   176.51
1946.33    0.327   171.54
1947.33    0.301   165.76
1948.33    0.268   158.70
1949.33    0.226   149.34
1950.33    0.176   135.11
1951.33    0.124   108.66
1952.33    0.107    61.42
1953.33    0.147    22.82
1954.33    0.208     4.07
1955.33    0.270   353.94
1956.33    0.327   347.49
1957.33    0.378   342.88
1958.33    0.425   339.34
1959.33    0.468   336.48
1960.33    0.508   334.08
1961.33    0.544   332.02
1962.33    0.578   330.20
1963.33    0.609   328.58
1964.33    0.639   327.12
1965.33    0.666   325.78
1966.33    0.692   324.54
1967.33    0.716   323.39
1968.33    0.739   322.31
1969.33    0.760   321.29
1970.33    0.781   320.33
1971.33    0.800   319.42
1972.33    0.819   318.55
1973.33    0.836   317.71
1974.33    0.852   316.91
1975.33    0.868   316.14
1976.33    0.883   315.40
1977.33    0.897   314.68
1978.33    0.911   313.98
1979.33    0.924   313.30
1980.33    0.936   312.64
1981.33    0.947   312.00
1982.33    0.958   311.37
1983.33    0.969   310.75
1984.33    0.979   310.15
1985.33    0.988   309.56
1986.33    0.997   308.98
1987.33    1.006   308.41
1988.33    1.014   307.85
1989.33    1.022   307.30
1990.33    1.029   306.76
1991.33    1.036   306.23
1992.33    1.042   305.70
1993.33    1.048   305.17
1994.33    1.054   304.66
1995.33    1.060   304.15
1996.33    1.065   303.64
1997.33    1.069   303.14
1998.33    1.074   302.64
1999.33    1.078   302.15
2000.33    1.082   301.66
2001.33    1.085   301.17
2002.33    1.088   300.69
2003.33    1.091   300.21
2004.33    1.094   299.73
2005.33    1.096   299.26
2006.33    1.099   298.78
2007.33    1.100   298.31
2008.33    1.102   297.84
2009.33    1.103   297.37
2010.33    1.105   296.90
2011.33    1.105   296.44
2012.33    1.106   295.97
2013.33    1.107   295.50
2014.33    1.107   295.04
2015.33    1.107   294.57
2016.33    1.107   294.10
2017.33    1.106   293.64
2018.33    1.106   293.17
2019.33    1.105   292.70
2020.33    1.104   292.24
2021.33    1.103   291.77
2022.33    1.101   291.30
2023.33    1.100   290.83
2024.33    1.098   290.35
2025.33    1.096   289.88
2026.33    1.094   289.40
2027.33    1.091   288.92
2028.33    1.089   288.44
2029.33    1.086   287.96
2030.33    1.083   287.48
2031.33    1.080   286.99
2032.33    1.077   286.50
2033.33    1.074   286.01
2034.33    1.071   285.51
2035.33    1.067   285.01
2036.33    1.063   284.51
2037.33    1.059   284.00
2038.33    1.055   283.49
2039.33    1.051   282.97
2040.33    1.046   282.46
2041.33    1.042   281.93
2042.33    1.037   281.40
2043.33    1.032   280.87
2044.33    1.027   280.33
2045.33    1.022   279.79
2046.33    1.017   279.24
2047.33    1.012   278.69
2048.33    1.006   278.13
2049.33    1.001   277.56
2050.33    0.995   276.98
2051.33    0.989   276.40
2052.33    0.983   275.82
2053.33    0.977   275.22
2054.33    0.971   274.62
2055.33    0.964   274.01
2056.33    0.958   273.39
2057.33    0.951   272.77
2058.33    0.944   272.13
2059.33    0.938   271.49
2060.33    0.931   270.83
2061.33    0.924   270.17
2062.33    0.916   269.50
2063.33    0.909   268.81
2064.33    0.902   268.11
2065.33    0.894   267.41
2066.33    0.887   266.69
2067.33    0.879   265.96
2068.33    0.871   265.21
2069.33    0.864   264.45
2070.33    0.856   263.68
2071.33    0.848   262.89
2072.33    0.839   262.09
2073.33    0.831   261.27
2074.33    0.823   260.44
2075.33    0.814   259.59
2076.33    0.806   258.72
2077.33    0.797   257.83
2078.33    0.789   256.92
2079.33    0.780   255.99
2080.33    0.771   255.05
2081.33    0.763   254.08
2082.33    0.754   253.08
2083.33    0.745   252.07
2084.33    0.736   251.02
2085.33    0.727   249.96
2086.33    0.717   248.86
2087.33    0.708   247.74
2088.33    0.699   246.59
2089.33    0.690   245.40
2090.33    0.680   244.19
2091.33    0.671   242.94
2092.33    0.662   241.65
2093.33    0.652   240.33
2094.33    0.643   238.97
2095.33    0.633   237.57
2096.33    0.624   236.12
2097.33    0.614   234.63
2098.33    0.605   233.09
2099.33    0.595   231.51
2100.33    0.585   229.87
2101.33    0.576   228.18
2102.33    0.566   226.43
2103.33    0.556   224.61
2104.33    0.547   222.74
2105.33    0.537   220.79
2106.33    0.527   218.78
2107.33    0.517   216.68
2108.33    0.507   214.50
2109.33    0.497   212.24
2110.33    0.487   209.88
2111.33    0.476   207.42
2112.33    0.466   204.85






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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 14:50:38



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