Double Star Calculator - Orbit

Orbital Elements for STT359

WDS:	STT359	WDS ID/Discoverer
P:	219.300	Orbital period (years)
a:	0.425	Semi-major axis (arcseconds)
i:	119.9	Inclination (degrees)
Ω:	10.0	Longitude of ascending node (degrees)
T:	1929.081	Epoch of periastron passage (year)
e:	0.8393	Eccentricity
ω:	197.7	Longitude of periastron (degrees)
Start-Year:	1915.35	Year
End-Year:	2134.65	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT359
Position:	183530.40+233619.9	Epoch-2000 right ascension and declination
WDS-ID:	18355+2336	WDS designation
Discoverer Code:	STT359	Discover designation and components
ADS number:	11479	Aitken Double Star catalog
HD number:	171745	HD catalog number
Hipparcos number:	91139	Hipparcos catalog number
V1:	6.35	Magnitude of the primary
V2:	6.62	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2006	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:	Sca2009a	Reference

Double Star Orbit for STT359

WDS 6th Orbit including measures of STT359

-- 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 STT359

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.757     2.68
--------------------------
1915.35    0.173   321.68
1916.35    0.160   318.79
1917.35    0.147   315.37
1918.35    0.134   311.28
1919.35    0.121   306.32
1920.35    0.109   300.19
1921.35    0.097   292.53
1922.35    0.086   282.91
1923.35    0.078   270.96
1924.35    0.073   256.70
1925.35    0.070   240.83
1926.35    0.071   224.61
1927.35    0.072   208.94
1928.35    0.071   193.43
1929.35    0.063   175.77
1930.35    0.052   151.18
1931.35    0.047   116.90
1932.35    0.056    85.16
1933.35    0.073    65.32
1934.35    0.094    53.64
1935.35    0.115    46.21
1936.35    0.136    41.08
1937.35    0.156    37.31
1938.35    0.176    34.39
1939.35    0.195    32.04
1940.35    0.213    30.10
1941.35    0.230    28.47
1942.35    0.247    27.05
1943.35    0.263    25.82
1944.35    0.279    24.73
1945.35    0.294    23.75
1946.35    0.309    22.86
1947.35    0.323    22.06
1948.35    0.337    21.32
1949.35    0.350    20.64
1950.35    0.363    20.01
1951.35    0.375    19.42
1952.35    0.388    18.86
1953.35    0.399    18.34
1954.35    0.411    17.85
1955.35    0.422    17.39
1956.35    0.433    16.95
1957.35    0.443    16.53
1958.35    0.454    16.13
1959.35    0.464    15.75
1960.35    0.474    15.39
1961.35    0.483    15.04
1962.35    0.492    14.70
1963.35    0.501    14.37
1964.35    0.510    14.06
1965.35    0.519    13.75
1966.35    0.527    13.46
1967.35    0.535    13.18
1968.35    0.543    12.90
1969.35    0.551    12.63
1970.35    0.559    12.37
1971.35    0.566    12.12
1972.35    0.573    11.87
1973.35    0.580    11.63
1974.35    0.587    11.39
1975.35    0.594    11.16
1976.35    0.600    10.93
1977.35    0.607    10.71
1978.35    0.613    10.50
1979.35    0.619    10.29
1980.35    0.625    10.08
1981.35    0.630     9.87
1982.35    0.636     9.67
1983.35    0.641     9.48
1984.35    0.646     9.28
1985.35    0.652     9.09
1986.35    0.657     8.90
1987.35    0.661     8.72
1988.35    0.666     8.54
1989.35    0.671     8.36
1990.35    0.675     8.18
1991.35    0.679     8.00
1992.35    0.683     7.83
1993.35    0.688     7.66
1994.35    0.691     7.49
1995.35    0.695     7.32
1996.35    0.699     7.16
1997.35    0.702     6.99
1998.35    0.706     6.83
1999.35    0.709     6.67
2000.35    0.712     6.51
2001.35    0.715     6.35
2002.35    0.718     6.20
2003.35    0.721     6.04
2004.35    0.724     5.89
2005.35    0.726     5.74
2006.35    0.729     5.58
2007.35    0.731     5.43
2008.35    0.734     5.28
2009.35    0.736     5.14
2010.35    0.738     4.99
2011.35    0.740     4.84
2012.35    0.742     4.69
2013.35    0.743     4.55
2014.35    0.745     4.40
2015.35    0.747     4.26
2016.35    0.748     4.11
2017.35    0.749     3.97
2018.35    0.751     3.83
2019.35    0.752     3.69
2020.35    0.753     3.54
2021.35    0.754     3.40
2022.35    0.754     3.26
2023.35    0.755     3.12
2024.35    0.756     2.98
2025.35    0.756     2.84
2026.35    0.757     2.70
2027.35    0.757     2.56
2028.35    0.757     2.42
2029.35    0.757     2.28
2030.35    0.758     2.14
2031.35    0.757     2.00
2032.35    0.757     1.86
2033.35    0.757     1.72
2034.35    0.757     1.58
2035.35    0.756     1.44
2036.35    0.756     1.30
2037.35    0.755     1.16
2038.35    0.754     1.01
2039.35    0.754     0.87
2040.35    0.753     0.73
2041.35    0.752     0.59
2042.35    0.751     0.45
2043.35    0.749     0.30
2044.35    0.748     0.16
2045.35    0.747     0.02
2046.35    0.745   359.87
2047.35    0.744   359.73
2048.35    0.742   359.58
2049.35    0.740   359.44
2050.35    0.738   359.29
2051.35    0.736   359.14
2052.35    0.734   358.99
2053.35    0.732   358.84
2054.35    0.730   358.69
2055.35    0.727   358.54
2056.35    0.725   358.39
2057.35    0.723   358.23
2058.35    0.720   358.08
2059.35    0.717   357.92
2060.35    0.714   357.77
2061.35    0.711   357.61
2062.35    0.708   357.45
2063.35    0.705   357.29
2064.35    0.702   357.13
2065.35    0.699   356.96
2066.35    0.695   356.80
2067.35    0.692   356.63
2068.35    0.688   356.46
2069.35    0.685   356.29
2070.35    0.681   356.12
2071.35    0.677   355.95
2072.35    0.673   355.77
2073.35    0.669   355.59
2074.35    0.665   355.41
2075.35    0.660   355.23
2076.35    0.656   355.04
2077.35    0.651   354.85
2078.35    0.647   354.66
2079.35    0.642   354.47
2080.35    0.637   354.27
2081.35    0.632   354.07
2082.35    0.627   353.87
2083.35    0.622   353.66
2084.35    0.617   353.45
2085.35    0.611   353.24
2086.35    0.606   353.02
2087.35    0.600   352.80
2088.35    0.595   352.58
2089.35    0.589   352.35
2090.35    0.583   352.11
2091.35    0.577   351.88
2092.35    0.571   351.63
2093.35    0.564   351.38
2094.35    0.558   351.13
2095.35    0.551   350.86
2096.35    0.545   350.60
2097.35    0.538   350.32
2098.35    0.531   350.04
2099.35    0.524   349.75
2100.35    0.517   349.46
2101.35    0.509   349.15
2102.35    0.502   348.84
2103.35    0.494   348.51
2104.35    0.487   348.18
2105.35    0.479   347.83
2106.35    0.471   347.48
2107.35    0.462   347.11
2108.35    0.454   346.72
2109.35    0.446   346.33
2110.35    0.437   345.91
2111.35    0.428   345.49
2112.35    0.419   345.04
2113.35    0.410   344.57
2114.35    0.401   344.08
2115.35    0.392   343.57
2116.35    0.382   343.03
2117.35    0.372   342.47
2118.35    0.362   341.87
2119.35    0.352   341.25
2120.35    0.342   340.58
2121.35    0.332   339.87
2122.35    0.321   339.11
2123.35    0.310   338.31
2124.35    0.299   337.44
2125.35    0.288   336.50
2126.35    0.276   335.49
2127.35    0.264   334.39
2128.35    0.253   333.19
2129.35    0.240   331.87
2130.35    0.228   330.40
2131.35    0.216   328.77
2132.35    0.203   326.94
2133.35    0.190   324.85
2134.35    0.177   322.47

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 17:53:07