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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:19:41

Orbital Elements for STF1781AB
WDS: STF1781AB WDS ID/Discoverer
P: 253.705 Orbital period (years)
a: 1.00383 Semi-major axis (arcseconds)
i: 44.45 Inclination (degrees)
Ω: 179.465 Longitude of ascending node (degrees)
T: 1976.218 Epoch of periastron passage (year)
e: 0.63185 Eccentricity
ω: 250.326 Longitude of periastron (degrees)
Start-Year: 1899.0 Year
End-Year: 2151.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1781AB
Position: 134606.75+050656.1 Epoch-2000 right ascension and declination
WDS-ID: 13461+0507 WDS designation
Discoverer Code: STF1781AB Discover designation and components
ADS number: 9019 Aitken Double Star catalog
HD number: 119931 HD catalog number
Hipparcos number: 67186 Hipparcos catalog number
V1: 7.89 Magnitude of the primary
V2: 8.10 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for STF1781AB



WDS 6th Orbit including measures of STF1781AB

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


Ephemeris of STF1781AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.088    201.7
-------------------------
1899.0     1.038    273.0
1900.0     1.033    273.7
1901.0     1.028    274.5
1902.0     1.023    275.2
1903.0     1.018    276.0
1904.0     1.013    276.8
1905.0     1.007    277.5
1906.0     1.002    278.3
1907.0     0.997    279.1
1908.0     0.991    279.9
1909.0     0.986    280.7
1910.0     0.980    281.5
1911.0     0.975    282.4
1912.0     0.969    283.2
1913.0     0.964    284.1
1914.0     0.958    284.9
1915.0     0.952    285.8
1916.0     0.946    286.7
1917.0     0.941    287.5
1918.0     0.935    288.4
1919.0     0.929    289.4
1920.0     0.923    290.3
1921.0     0.917    291.2
1922.0     0.911    292.2
1923.0     0.905    293.1
1924.0     0.899    294.1
1925.0     0.893    295.1
1926.0     0.887    296.1
1927.0     0.880    297.1
1928.0     0.874    298.1
1929.0     0.867    299.2
1930.0     0.861    300.2
1931.0     0.854    301.3
1932.0     0.848    302.4
1933.0     0.841    303.5
1934.0     0.834    304.6
1935.0     0.827    305.8
1936.0     0.820    306.9
1937.0     0.813    308.1
1938.0     0.806    309.3
1939.0     0.798    310.6
1940.0     0.791    311.8
1941.0     0.783    313.1
1942.0     0.775    314.4
1943.0     0.767    315.7
1944.0     0.759    317.1
1945.0     0.751    318.5
1946.0     0.742    319.9
1947.0     0.734    321.3
1948.0     0.725    322.8
1949.0     0.716    324.4
1950.0     0.706    325.9
1951.0     0.696    327.5
1952.0     0.686    329.2
1953.0     0.675    330.9
1954.0     0.665    332.7
1955.0     0.653    334.5
1956.0     0.641    336.4
1957.0     0.629    338.3
1958.0     0.616    340.4
1959.0     0.603    342.5
1960.0     0.589    344.7
1961.0     0.574    347.1
1962.0     0.558    349.5
1963.0     0.542    352.2
1964.0     0.525    354.9
1965.0     0.507    357.9
1966.0     0.488      1.1
1967.0     0.468      4.6
1968.0     0.447      8.4
1969.0     0.425     12.5
1970.0     0.402     17.2
1971.0     0.379     22.4
1972.0     0.356     28.2
1973.0     0.334     34.9
1974.0     0.313     42.5
1975.0     0.295     51.0
1976.0     0.280     60.6
1977.0     0.271     71.1
1978.0     0.268     82.0
1979.0     0.272     92.9
1980.0     0.282    103.3
1981.0     0.297    112.7
1982.0     0.317    121.1
1983.0     0.341    128.5
1984.0     0.366    134.8
1985.0     0.392    140.3
1986.0     0.420    145.2
1987.0     0.447    149.4
1988.0     0.475    153.1
1989.0     0.502    156.4
1990.0     0.528    159.4
1991.0     0.554    162.1
1992.0     0.580    164.6
1993.0     0.604    166.8
1994.0     0.628    168.9
1995.0     0.652    170.8
1996.0     0.674    172.6
1997.0     0.696    174.3
1998.0     0.717    175.9
1999.0     0.737    177.4
2000.0     0.757    178.8
2001.0     0.776    180.2
2002.0     0.794    181.4
2003.0     0.812    182.7
2004.0     0.830    183.8
2005.0     0.846    185.0
2006.0     0.862    186.1
2007.0     0.878    187.1
2008.0     0.893    188.1
2009.0     0.908    189.1
2010.0     0.922    190.0
2011.0     0.936    191.0
2012.0     0.949    191.8
2013.0     0.962    192.7
2014.0     0.974    193.6
2015.0     0.986    194.4
2016.0     0.998    195.2
2017.0     1.009    196.0
2018.0     1.020    196.7
2019.0     1.031    197.5
2020.0     1.041    198.2
2021.0     1.051    198.9
2022.0     1.061    199.7
2023.0     1.070    200.3
2024.0     1.079    201.0
2025.0     1.088    201.7
2026.0     1.096    202.4
2027.0     1.105    203.0
2028.0     1.112    203.7
2029.0     1.120    204.3
2030.0     1.127    204.9
2031.0     1.135    205.5
2032.0     1.141    206.2
2033.0     1.148    206.8
2034.0     1.155    207.4
2035.0     1.161    208.0
2036.0     1.167    208.5
2037.0     1.172    209.1
2038.0     1.178    209.7
2039.0     1.183    210.3
2040.0     1.188    210.8
2041.0     1.193    211.4
2042.0     1.198    211.9
2043.0     1.203    212.5
2044.0     1.207    213.0
2045.0     1.211    213.6
2046.0     1.215    214.1
2047.0     1.219    214.6
2048.0     1.223    215.2
2049.0     1.226    215.7
2050.0     1.230    216.2
2051.0     1.233    216.7
2052.0     1.236    217.3
2053.0     1.239    217.8
2054.0     1.242    218.3
2055.0     1.244    218.8
2056.0     1.247    219.3
2057.0     1.249    219.8
2058.0     1.251    220.3
2059.0     1.253    220.8
2060.0     1.255    221.3
2061.0     1.257    221.8
2062.0     1.258    222.3
2063.0     1.260    222.8
2064.0     1.261    223.3
2065.0     1.262    223.8
2066.0     1.263    224.3
2067.0     1.264    224.8
2068.0     1.265    225.3
2069.0     1.266    225.8
2070.0     1.266    226.3
2071.0     1.267    226.8
2072.0     1.267    227.3
2073.0     1.268    227.8
2074.0     1.268    228.3
2075.0     1.268    228.8
2076.0     1.268    229.3
2077.0     1.268    229.8
2078.0     1.267    230.2
2079.0     1.267    230.7
2080.0     1.267    231.2
2081.0     1.266    231.7
2082.0     1.265    232.2
2083.0     1.265    232.7
2084.0     1.264    233.2
2085.0     1.263    233.7
2086.0     1.262    234.2
2087.0     1.261    234.7
2088.0     1.260    235.2
2089.0     1.258    235.7
2090.0     1.257    236.2
2091.0     1.255    236.7
2092.0     1.254    237.2
2093.0     1.252    237.7
2094.0     1.251    238.2
2095.0     1.249    238.7
2096.0     1.247    239.2
2097.0     1.245    239.7
2098.0     1.243    240.2
2099.0     1.241    240.8
2100.0     1.239    241.3
2101.0     1.236    241.8
2102.0     1.234    242.3
2103.0     1.232    242.8
2104.0     1.229    243.3
2105.0     1.227    243.9
2106.0     1.224    244.4
2107.0     1.221    244.9
2108.0     1.219    245.5
2109.0     1.216    246.0
2110.0     1.213    246.5
2111.0     1.210    247.1
2112.0     1.207    247.6
2113.0     1.204    248.2
2114.0     1.201    248.7
2115.0     1.198    249.3
2116.0     1.194    249.8
2117.0     1.191    250.4
2118.0     1.188    250.9
2119.0     1.184    251.5
2120.0     1.181    252.0
2121.0     1.177    252.6
2122.0     1.173    253.2
2123.0     1.170    253.8
2124.0     1.166    254.3
2125.0     1.162    254.9
2126.0     1.158    255.5
2127.0     1.155    256.1
2128.0     1.151    256.7
2129.0     1.147    257.3
2130.0     1.143    257.9
2131.0     1.138    258.5
2132.0     1.134    259.1
2133.0     1.130    259.7
2134.0     1.126    260.4
2135.0     1.122    261.0
2136.0     1.117    261.6
2137.0     1.113    262.3
2138.0     1.108    262.9
2139.0     1.104    263.6
2140.0     1.099    264.2
2141.0     1.095    264.9
2142.0     1.090    265.5
2143.0     1.086    266.2
2144.0     1.081    266.9
2145.0     1.076    267.5
2146.0     1.071    268.2
2147.0     1.067    268.9
2148.0     1.062    269.6
2149.0     1.057    270.3
2150.0     1.052    271.0






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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