Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:58:20

Orbital Elements for STT218

WDS:	STT218	WDS ID/Discoverer
P:	300.000	Orbital period (years)
a:	0.725	Semi-major axis (arcseconds)
i:	50.4	Inclination (degrees)
Ω:	41.6	Longitude of ascending node (degrees)
T:	2038.910	Epoch of periastron passage (year)
e:	0.645	Eccentricity
ω:	221.8	Longitude of periastron (degrees)
Start-Year:	1875.0	Year
End-Year:	2175.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT218

Position:	102730.21+033348.7	Epoch-2000 right ascension and declination
WDS-ID:	10275+0334	WDS designation
Discoverer Code:	STT218	Discover designation and components
ADS number:	7779	Aitken Double Star catalog
HD number:	90572	HD catalog number
Hipparcos number:	51204	Hipparcos catalog number
V1:	7.44	Magnitude of the primary
V2:	9.60	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for STT218

WDS 6th Orbit including measures of STT218

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of STT218

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.332    197.0
-------------------------
1875.0     1.050     67.3
1876.0     1.048     67.6
1877.0     1.047     67.9
1878.0     1.045     68.2
1879.0     1.044     68.4
1880.0     1.042     68.7
1881.0     1.040     69.0
1882.0     1.038     69.3
1883.0     1.036     69.6
1884.0     1.034     69.9
1885.0     1.032     70.1
1886.0     1.030     70.4
1887.0     1.028     70.7
1888.0     1.026     71.0
1889.0     1.023     71.3
1890.0     1.021     71.6
1891.0     1.018     71.9
1892.0     1.015     72.2
1893.0     1.013     72.5
1894.0     1.010     72.8
1895.0     1.007     73.1
1896.0     1.004     73.4
1897.0     1.001     73.7
1898.0     0.998     74.0
1899.0     0.995     74.3
1900.0     0.992     74.6
1901.0     0.989     74.9
1902.0     0.985     75.3
1903.0     0.982     75.6
1904.0     0.979     75.9
1905.0     0.975     76.2
1906.0     0.971     76.5
1907.0     0.968     76.9
1908.0     0.964     77.2
1909.0     0.960     77.5
1910.0     0.956     77.9
1911.0     0.952     78.2
1912.0     0.948     78.5
1913.0     0.944     78.9
1914.0     0.940     79.2
1915.0     0.936     79.6
1916.0     0.932     79.9
1917.0     0.928     80.3
1918.0     0.923     80.6
1919.0     0.919     81.0
1920.0     0.914     81.4
1921.0     0.910     81.7
1922.0     0.905     82.1
1923.0     0.900     82.5
1924.0     0.896     82.9
1925.0     0.891     83.3
1926.0     0.886     83.7
1927.0     0.881     84.0
1928.0     0.876     84.4
1929.0     0.871     84.8
1930.0     0.866     85.3
1931.0     0.861     85.7
1932.0     0.856     86.1
1933.0     0.850     86.5
1934.0     0.845     86.9
1935.0     0.840     87.4
1936.0     0.834     87.8
1937.0     0.829     88.2
1938.0     0.823     88.7
1939.0     0.818     89.2
1940.0     0.812     89.6
1941.0     0.806     90.1
1942.0     0.801     90.6
1943.0     0.795     91.0
1944.0     0.789     91.5
1945.0     0.783     92.0
1946.0     0.777     92.5
1947.0     0.771     93.1
1948.0     0.765     93.6
1949.0     0.759     94.1
1950.0     0.753     94.6
1951.0     0.747     95.2
1952.0     0.741     95.7
1953.0     0.734     96.3
1954.0     0.728     96.9
1955.0     0.722     97.5
1956.0     0.716     98.1
1957.0     0.709     98.7
1958.0     0.703     99.3
1959.0     0.696     99.9
1960.0     0.690    100.5
1961.0     0.683    101.2
1962.0     0.677    101.9
1963.0     0.670    102.5
1964.0     0.664    103.2
1965.0     0.657    103.9
1966.0     0.650    104.7
1967.0     0.644    105.4
1968.0     0.637    106.1
1969.0     0.630    106.9
1970.0     0.624    107.7
1971.0     0.617    108.5
1972.0     0.610    109.3
1973.0     0.604    110.1
1974.0     0.597    111.0
1975.0     0.590    111.9
1976.0     0.583    112.8
1977.0     0.577    113.7
1978.0     0.570    114.6
1979.0     0.563    115.6
1980.0     0.556    116.5
1981.0     0.550    117.5
1982.0     0.543    118.6
1983.0     0.537    119.6
1984.0     0.530    120.7
1985.0     0.523    121.8
1986.0     0.517    123.0
1987.0     0.510    124.1
1988.0     0.504    125.3
1989.0     0.498    126.5
1990.0     0.491    127.8
1991.0     0.485    129.1
1992.0     0.479    130.4
1993.0     0.473    131.8
1994.0     0.467    133.2
1995.0     0.461    134.6
1996.0     0.455    136.1
1997.0     0.449    137.6
1998.0     0.443    139.1
1999.0     0.438    140.7
2000.0     0.432    142.3
2001.0     0.427    144.0
2002.0     0.422    145.7
2003.0     0.417    147.4
2004.0     0.412    149.2
2005.0     0.407    151.1
2006.0     0.402    152.9
2007.0     0.398    154.8
2008.0     0.393    156.8
2009.0     0.389    158.8
2010.0     0.385    160.9
2011.0     0.381    163.0
2012.0     0.377    165.1
2013.0     0.373    167.3
2014.0     0.370    169.5
2015.0     0.366    171.8
2016.0     0.363    174.1
2017.0     0.359    176.5
2018.0     0.356    178.9
2019.0     0.353    181.3
2020.0     0.350    183.8
2021.0     0.346    186.3
2022.0     0.343    188.9
2023.0     0.339    191.6
2024.0     0.336    194.3
2025.0     0.332    197.0
2026.0     0.328    199.8
2027.0     0.323    202.7
2028.0     0.318    205.7
2029.0     0.312    208.8
2030.0     0.306    212.0
2031.0     0.300    215.4
2032.0     0.292    218.9
2033.0     0.284    222.6
2034.0     0.274    226.5
2035.0     0.265    230.8
2036.0     0.254    235.3
2037.0     0.243    240.3
2038.0     0.231    245.8
2039.0     0.220    251.8
2040.0     0.209    258.5
2041.0     0.199    265.9
2042.0     0.191    274.0
2043.0     0.186    282.7
2044.0     0.183    291.7
2045.0     0.184    300.9
2046.0     0.188    309.8
2047.0     0.195    318.3
2048.0     0.204    326.0
2049.0     0.216    333.0
2050.0     0.230    339.2
2051.0     0.245    344.6
2052.0     0.261    349.4
2053.0     0.278    353.7
2054.0     0.295    357.4
2055.0     0.313      0.7
2056.0     0.331      3.7
2057.0     0.348      6.4
2058.0     0.366      8.8
2059.0     0.383     11.0
2060.0     0.401     13.0
2061.0     0.418     14.8
2062.0     0.434     16.5
2063.0     0.451     18.1
2064.0     0.467     19.5
2065.0     0.483     20.9
2066.0     0.499     22.2
2067.0     0.514     23.4
2068.0     0.529     24.5
2069.0     0.544     25.6
2070.0     0.558     26.6
2071.0     0.572     27.5
2072.0     0.586     28.4
2073.0     0.600     29.3
2074.0     0.613     30.2
2075.0     0.626     31.0
2076.0     0.638     31.7
2077.0     0.651     32.5
2078.0     0.663     33.2
2079.0     0.675     33.9
2080.0     0.686     34.5
2081.0     0.698     35.2
2082.0     0.709     35.8
2083.0     0.720     36.4
2084.0     0.730     37.0
2085.0     0.741     37.5
2086.0     0.751     38.1
2087.0     0.761     38.6
2088.0     0.770     39.2
2089.0     0.780     39.7
2090.0     0.789     40.2
2091.0     0.798     40.7
2092.0     0.807     41.1
2093.0     0.816     41.6
2094.0     0.824     42.1
2095.0     0.832     42.5
2096.0     0.840     42.9
2097.0     0.848     43.4
2098.0     0.856     43.8
2099.0     0.863     44.2
2100.0     0.871     44.6
2101.0     0.878     45.0
2102.0     0.885     45.4
2103.0     0.892     45.8
2104.0     0.898     46.2
2105.0     0.905     46.6
2106.0     0.911     46.9
2107.0     0.917     47.3
2108.0     0.923     47.7
2109.0     0.929     48.0
2110.0     0.935     48.4
2111.0     0.940     48.7
2112.0     0.946     49.1
2113.0     0.951     49.4
2114.0     0.956     49.8
2115.0     0.961     50.1
2116.0     0.966     50.4
2117.0     0.970     50.8
2118.0     0.975     51.1
2119.0     0.979     51.4
2120.0     0.984     51.7
2121.0     0.988     52.0
2122.0     0.992     52.4
2123.0     0.996     52.7
2124.0     0.999     53.0
2125.0     1.003     53.3
2126.0     1.007     53.6
2127.0     1.010     53.9
2128.0     1.013     54.2
2129.0     1.016     54.5
2130.0     1.019     54.8
2131.0     1.022     55.1
2132.0     1.025     55.4
2133.0     1.028     55.7
2134.0     1.030     56.0
2135.0     1.033     56.2
2136.0     1.035     56.5
2137.0     1.037     56.8
2138.0     1.039     57.1
2139.0     1.041     57.4
2140.0     1.043     57.7
2141.0     1.045     57.9
2142.0     1.047     58.2
2143.0     1.049     58.5
2144.0     1.050     58.8
2145.0     1.051     59.1
2146.0     1.053     59.3
2147.0     1.054     59.6
2148.0     1.055     59.9
2149.0     1.056     60.2
2150.0     1.057     60.4
2151.0     1.058     60.7
2152.0     1.058     61.0
2153.0     1.059     61.3
2154.0     1.059     61.5
2155.0     1.060     61.8
2156.0     1.060     62.1
2157.0     1.060     62.4
2158.0     1.061     62.6
2159.0     1.061     62.9
2160.0     1.061     63.2
2161.0     1.060     63.5
2162.0     1.060     63.7
2163.0     1.060     64.0
2164.0     1.060     64.3
2165.0     1.059     64.6
2166.0     1.059     64.8
2167.0     1.058     65.1
2168.0     1.057     65.4
2169.0     1.056     65.6
2170.0     1.055     65.9
2171.0     1.054     66.2
2172.0     1.053     66.5
2173.0     1.052     66.8
2174.0     1.051     67.0

Disclaimer

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.