Double Star Calculator - Orbit

Orbital Elements for RST3557

WDS:	RST3557	WDS ID/Discoverer
P:	220.000	Orbital period (years)
a:	0.463	Semi-major axis (arcseconds)
i:	97.4	Inclination (degrees)
Ω:	123.6	Longitude of ascending node (degrees)
T:	2030.760	Epoch of periastron passage (year)
e:	0.2	Eccentricity
ω:	309.0	Longitude of periastron (degrees)
Start-Year:	1915.0	Year
End-Year:	2135.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3557
Position:	075321.16-523913.6	Epoch-2000 right ascension and declination
WDS-ID:	07534-5239	WDS designation
Discoverer Code:	RST3557	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	38526	Hipparcos catalog number
V1:	9.81	Magnitude of the primary
V2:	11.50	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2021c	Reference

Double Star Orbit for RST3557

WDS 6th Orbit including measures of RST3557

-- 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 RST3557

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.181   137.03
--------------------------
1915.00    0.305   315.00
1916.00    0.314   314.53
1917.00    0.322   314.09
1918.00    0.331   313.68
1919.00    0.339   313.29
1920.00    0.348   312.91
1921.00    0.356   312.55
1922.00    0.364   312.21
1923.00    0.372   311.88
1924.00    0.380   311.57
1925.00    0.387   311.27
1926.00    0.395   310.98
1927.00    0.402   310.70
1928.00    0.409   310.43
1929.00    0.416   310.17
1930.00    0.422   309.92
1931.00    0.429   309.67
1932.00    0.435   309.44
1933.00    0.441   309.21
1934.00    0.447   308.98
1935.00    0.452   308.76
1936.00    0.458   308.55
1937.00    0.463   308.34
1938.00    0.468   308.13
1939.00    0.473   307.93
1940.00    0.477   307.74
1941.00    0.482   307.55
1942.00    0.486   307.36
1943.00    0.489   307.17
1944.00    0.493   306.99
1945.00    0.496   306.81
1946.00    0.499   306.63
1947.00    0.502   306.45
1948.00    0.505   306.28
1949.00    0.507   306.10
1950.00    0.509   305.93
1951.00    0.511   305.76
1952.00    0.512   305.59
1953.00    0.514   305.42
1954.00    0.515   305.26
1955.00    0.515   305.09
1956.00    0.516   304.92
1957.00    0.516   304.76
1958.00    0.516   304.59
1959.00    0.515   304.42
1960.00    0.514   304.26
1961.00    0.513   304.09
1962.00    0.512   303.92
1963.00    0.510   303.75
1964.00    0.508   303.58
1965.00    0.506   303.41
1966.00    0.503   303.23
1967.00    0.500   303.06
1968.00    0.497   302.88
1969.00    0.494   302.70
1970.00    0.490   302.52
1971.00    0.486   302.33
1972.00    0.481   302.14
1973.00    0.476   301.95
1974.00    0.471   301.75
1975.00    0.466   301.55
1976.00    0.460   301.34
1977.00    0.454   301.13
1978.00    0.447   300.91
1979.00    0.440   300.69
1980.00    0.433   300.46
1981.00    0.426   300.22
1982.00    0.418   299.97
1983.00    0.410   299.71
1984.00    0.401   299.44
1985.00    0.393   299.16
1986.00    0.383   298.86
1987.00    0.374   298.56
1988.00    0.364   298.23
1989.00    0.354   297.89
1990.00    0.344   297.52
1991.00    0.333   297.14
1992.00    0.322   296.73
1993.00    0.311   296.28
1994.00    0.299   295.81
1995.00    0.288   295.29
1996.00    0.276   294.74
1997.00    0.263   294.13
1998.00    0.251   293.45
1999.00    0.238   292.71
2000.00    0.225   291.88
2001.00    0.211   290.95
2002.00    0.198   289.90
2003.00    0.185   288.68
2004.00    0.171   287.28
2005.00    0.157   285.63
2006.00    0.143   283.66
2007.00    0.129   281.28
2008.00    0.116   278.33
2009.00    0.102   274.59
2010.00    0.089   269.75
2011.00    0.077   263.32
2012.00    0.066   254.61
2013.00    0.057   242.80
2014.00    0.051   227.47
2015.00    0.050   209.76
2016.00    0.053   192.59
2017.00    0.060   178.41
2018.00    0.070   167.73
2019.00    0.081   159.87
2020.00    0.094   154.03
2021.00    0.107   149.60
2022.00    0.120   146.15
2023.00    0.134   143.40
2024.00    0.148   141.16
2025.00    0.161   139.30
2026.00    0.175   137.72
2027.00    0.188   136.38
2028.00    0.201   135.21
2029.00    0.214   134.18
2030.00    0.227   133.27
2031.00    0.239   132.45
2032.00    0.251   131.71
2033.00    0.263   131.04
2034.00    0.274   130.42
2035.00    0.285   129.86
2036.00    0.295   129.33
2037.00    0.305   128.84
2038.00    0.314   128.37
2039.00    0.323   127.94
2040.00    0.332   127.53
2041.00    0.340   127.14
2042.00    0.348   126.76
2043.00    0.355   126.40
2044.00    0.361   126.06
2045.00    0.367   125.72
2046.00    0.373   125.40
2047.00    0.378   125.09
2048.00    0.382   124.78
2049.00    0.386   124.48
2050.00    0.389   124.18
2051.00    0.392   123.89
2052.00    0.395   123.61
2053.00    0.397   123.33
2054.00    0.398   123.05
2055.00    0.399   122.77
2056.00    0.399   122.49
2057.00    0.399   122.21
2058.00    0.398   121.93
2059.00    0.397   121.65
2060.00    0.396   121.37
2061.00    0.394   121.09
2062.00    0.392   120.80
2063.00    0.389   120.51
2064.00    0.386   120.21
2065.00    0.382   119.91
2066.00    0.378   119.61
2067.00    0.374   119.29
2068.00    0.369   118.97
2069.00    0.364   118.64
2070.00    0.358   118.30
2071.00    0.352   117.95
2072.00    0.346   117.59
2073.00    0.340   117.21
2074.00    0.333   116.82
2075.00    0.326   116.42
2076.00    0.319   115.99
2077.00    0.312   115.55
2078.00    0.304   115.08
2079.00    0.296   114.59
2080.00    0.288   114.07
2081.00    0.279   113.52
2082.00    0.271   112.93
2083.00    0.262   112.31
2084.00    0.253   111.64
2085.00    0.244   110.92
2086.00    0.235   110.15
2087.00    0.225   109.31
2088.00    0.216   108.41
2089.00    0.207   107.41
2090.00    0.197   106.32
2091.00    0.187   105.12
2092.00    0.178   103.79
2093.00    0.168   102.31
2094.00    0.158   100.64
2095.00    0.148    98.75
2096.00    0.139    96.61
2097.00    0.130    94.15
2098.00    0.120    91.30
2099.00    0.111    88.00
2100.00    0.103    84.12
2101.00    0.095    79.57
2102.00    0.087    74.20
2103.00    0.081    67.89
2104.00    0.075    60.56
2105.00    0.071    52.23
2106.00    0.068    43.09
2107.00    0.068    33.51
2108.00    0.069    23.99
2109.00    0.072    15.03
2110.00    0.076     6.94
2111.00    0.082   359.87
2112.00    0.089   353.81
2113.00    0.097   348.66
2114.00    0.105   344.29
2115.00    0.114   340.58
2116.00    0.123   337.40
2117.00    0.132   334.67
2118.00    0.142   332.30
2119.00    0.151   330.23
2120.00    0.161   328.41
2121.00    0.171   326.80
2122.00    0.181   325.37
2123.00    0.190   324.08
2124.00    0.200   322.92
2125.00    0.210   321.87
2126.00    0.220   320.91
2127.00    0.230   320.03
2128.00    0.239   319.23
2129.00    0.249   318.49
2130.00    0.259   317.80
2131.00    0.268   317.16
2132.00    0.277   316.57
2133.00    0.287   316.01
2134.00    0.296   315.49

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 16:02:34