Double Star Calculator - Orbit

Orbital Elements for RST1816
WDS: RST1816 WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 0.212 Semi-major axis (arcseconds)
i: 155.3 Inclination (degrees)
Ω: 70.0 Longitude of ascending node (degrees)
T: 2024.120 Epoch of periastron passage (year)
e: 0.866 Eccentricity
ω: 7.9 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for RST1816
Position: 150909.51-761409.9 Epoch-2000 right ascension and declination
WDS-ID: 15092-7614 WDS designation
Discoverer Code: RST1816 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 133123 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.9 Magnitude of the primary
V2: 10.1 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 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: Tok2023a Reference

Double Star Orbit for RST1816



WDS 6th Orbit including measures of RST1816

-- 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 RST1816
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.035   359.66
--------------------------
1875.00    0.395   242.68
1876.00    0.395   242.52
1877.00    0.395   242.36
1878.00    0.395   242.21
1879.00    0.395   242.05
1880.00    0.394   241.89
1881.00    0.394   241.73
1882.00    0.394   241.57
1883.00    0.394   241.42
1884.00    0.394   241.26
1885.00    0.393   241.10
1886.00    0.393   240.94
1887.00    0.393   240.78
1888.00    0.392   240.62
1889.00    0.392   240.46
1890.00    0.391   240.30
1891.00    0.391   240.14
1892.00    0.391   239.98
1893.00    0.390   239.82
1894.00    0.390   239.66
1895.00    0.389   239.50
1896.00    0.389   239.34
1897.00    0.388   239.18
1898.00    0.387   239.01
1899.00    0.387   238.85
1900.00    0.386   238.69
1901.00    0.386   238.52
1902.00    0.385   238.36
1903.00    0.384   238.19
1904.00    0.383   238.02
1905.00    0.383   237.86
1906.00    0.382   237.69
1907.00    0.381   237.52
1908.00    0.380   237.35
1909.00    0.379   237.18
1910.00    0.379   237.01
1911.00    0.378   236.84
1912.00    0.377   236.67
1913.00    0.376   236.50
1914.00    0.375   236.32
1915.00    0.374   236.15
1916.00    0.373   235.97
1917.00    0.372   235.79
1918.00    0.371   235.62
1919.00    0.369   235.44
1920.00    0.368   235.26
1921.00    0.367   235.07
1922.00    0.366   234.89
1923.00    0.365   234.71
1924.00    0.363   234.52
1925.00    0.362   234.34
1926.00    0.361   234.15
1927.00    0.360   233.96
1928.00    0.358   233.77
1929.00    0.357   233.58
1930.00    0.355   233.39
1931.00    0.354   233.19
1932.00    0.352   232.99
1933.00    0.351   232.80
1934.00    0.349   232.60
1935.00    0.348   232.40
1936.00    0.346   232.19
1937.00    0.345   231.99
1938.00    0.343   231.78
1939.00    0.341   231.57
1940.00    0.340   231.36
1941.00    0.338   231.15
1942.00    0.336   230.93
1943.00    0.334   230.71
1944.00    0.332   230.49
1945.00    0.331   230.27
1946.00    0.329   230.04
1947.00    0.327   229.81
1948.00    0.325   229.58
1949.00    0.323   229.35
1950.00    0.321   229.11
1951.00    0.319   228.87
1952.00    0.317   228.63
1953.00    0.315   228.39
1954.00    0.312   228.14
1955.00    0.310   227.88
1956.00    0.308   227.63
1957.00    0.306   227.37
1958.00    0.303   227.10
1959.00    0.301   226.83
1960.00    0.299   226.56
1961.00    0.296   226.28
1962.00    0.294   226.00
1963.00    0.291   225.72
1964.00    0.289   225.43
1965.00    0.286   225.13
1966.00    0.284   224.83
1967.00    0.281   224.52
1968.00    0.278   224.21
1969.00    0.276   223.89
1970.00    0.273   223.56
1971.00    0.270   223.23
1972.00    0.267   222.89
1973.00    0.264   222.54
1974.00    0.261   222.19
1975.00    0.258   221.82
1976.00    0.255   221.45
1977.00    0.252   221.07
1978.00    0.249   220.68
1979.00    0.246   220.28
1980.00    0.242   219.87
1981.00    0.239   219.44
1982.00    0.236   219.01
1983.00    0.232   218.56
1984.00    0.229   218.10
1985.00    0.225   217.63
1986.00    0.222   217.13
1987.00    0.218   216.63
1988.00    0.214   216.10
1989.00    0.211   215.56
1990.00    0.207   215.00
1991.00    0.203   214.41
1992.00    0.199   213.81
1993.00    0.195   213.17
1994.00    0.191   212.51
1995.00    0.186   211.82
1996.00    0.182   211.10
1997.00    0.178   210.35
1998.00    0.173   209.55
1999.00    0.169   208.71
2000.00    0.164   207.83
2001.00    0.159   206.89
2002.00    0.155   205.90
2003.00    0.150   204.84
2004.00    0.145   203.71
2005.00    0.140   202.50
2006.00    0.134   201.19
2007.00    0.129   199.78
2008.00    0.123   198.24
2009.00    0.118   196.55
2010.00    0.112   194.70
2011.00    0.106   192.64
2012.00    0.100   190.33
2013.00    0.094   187.72
2014.00    0.088   184.74
2015.00    0.081   181.29
2016.00    0.074   177.22
2017.00    0.068   172.34
2018.00    0.061   166.35
2019.00    0.054   158.82
2020.00    0.047   149.08
2021.00    0.040   136.11
2022.00    0.035   118.55
2023.00    0.030    95.16
2024.00    0.028    66.46
2025.00    0.029    36.38
2026.00    0.033    10.30
2027.00    0.038   350.58
2028.00    0.045   336.35
2029.00    0.052   325.94
2030.00    0.060   318.08
2031.00    0.067   311.95
2032.00    0.074   307.02
2033.00    0.081   302.95
2034.00    0.088   299.52
2035.00    0.095   296.58
2036.00    0.101   294.03
2037.00    0.107   291.77
2038.00    0.114   289.76
2039.00    0.120   287.96
2040.00    0.125   286.32
2041.00    0.131   284.83
2042.00    0.137   283.46
2043.00    0.142   282.20
2044.00    0.147   281.02
2045.00    0.152   279.93
2046.00    0.157   278.91
2047.00    0.162   277.95
2048.00    0.167   277.05
2049.00    0.172   276.19
2050.00    0.176   275.39
2051.00    0.181   274.62
2052.00    0.185   273.89
2053.00    0.190   273.19
2054.00    0.194   272.53
2055.00    0.198   271.89
2056.00    0.202   271.28
2057.00    0.206   270.69
2058.00    0.210   270.12
2059.00    0.214   269.58
2060.00    0.218   269.06
2061.00    0.222   268.55
2062.00    0.225   268.06
2063.00    0.229   267.58
2064.00    0.233   267.12
2065.00    0.236   266.68
2066.00    0.239   266.24
2067.00    0.243   265.82
2068.00    0.246   265.41
2069.00    0.249   265.01
2070.00    0.253   264.63
2071.00    0.256   264.25
2072.00    0.259   263.88
2073.00    0.262   263.51
2074.00    0.265   263.16
2075.00    0.268   262.82
2076.00    0.271   262.48
2077.00    0.274   262.15
2078.00    0.277   261.82
2079.00    0.279   261.51
2080.00    0.282   261.20
2081.00    0.285   260.89
2082.00    0.287   260.59
2083.00    0.290   260.30
2084.00    0.292   260.01
2085.00    0.295   259.73
2086.00    0.297   259.45
2087.00    0.300   259.17
2088.00    0.302   258.90
2089.00    0.305   258.64
2090.00    0.307   258.37
2091.00    0.309   258.11
2092.00    0.312   257.86
2093.00    0.314   257.61
2094.00    0.316   257.36
2095.00    0.318   257.12
2096.00    0.320   256.88
2097.00    0.322   256.64
2098.00    0.324   256.41
2099.00    0.326   256.17
2100.00    0.328   255.95
2101.00    0.330   255.72
2102.00    0.332   255.50
2103.00    0.334   255.27
2104.00    0.336   255.06
2105.00    0.337   254.84
2106.00    0.339   254.63
2107.00    0.341   254.41
2108.00    0.343   254.20
2109.00    0.344   254.00
2110.00    0.346   253.79
2111.00    0.348   253.59
2112.00    0.349   253.39
2113.00    0.351   253.18
2114.00    0.352   252.99
2115.00    0.354   252.79
2116.00    0.355   252.59
2117.00    0.357   252.40
2118.00    0.358   252.21
2119.00    0.359   252.02
2120.00    0.361   251.83
2121.00    0.362   251.64
2122.00    0.363   251.46
2123.00    0.365   251.27
2124.00    0.366   251.09
2125.00    0.367   250.91
2126.00    0.368   250.72
2127.00    0.369   250.54
2128.00    0.371   250.36
2129.00    0.372   250.19
2130.00    0.373   250.01
2131.00    0.374   249.83
2132.00    0.375   249.66
2133.00    0.376   249.49
2134.00    0.377   249.31
2135.00    0.378   249.14
2136.00    0.379   248.97
2137.00    0.379   248.80
2138.00    0.380   248.63
2139.00    0.381   248.46
2140.00    0.382   248.29
2141.00    0.383   248.12
2142.00    0.383   247.96
2143.00    0.384   247.79
2144.00    0.385   247.62
2145.00    0.386   247.46
2146.00    0.386   247.29
2147.00    0.387   247.13
2148.00    0.388   246.97
2149.00    0.388   246.80
2150.00    0.389   246.64
2151.00    0.389   246.48
2152.00    0.390   246.32
2153.00    0.390   246.16
2154.00    0.391   246.00
2155.00    0.391   245.84
2156.00    0.392   245.68
2157.00    0.392   245.52
2158.00    0.392   245.36
2159.00    0.393   245.20
2160.00    0.393   245.04
2161.00    0.393   244.88
2162.00    0.394   244.72
2163.00    0.394   244.56
2164.00    0.394   244.41
2165.00    0.394   244.25
2166.00    0.394   244.09
2167.00    0.395   243.93
2168.00    0.395   243.78
2169.00    0.395   243.62
2170.00    0.395   243.46
2171.00    0.395   243.30
2172.00    0.395   243.15
2173.00    0.395   242.99
2174.00    0.395   242.83






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 17:12:55



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