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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:03:13

Orbital Elements for STF566AB,C

WDS:	STF566AB,C	WDS ID/Discoverer
P:	203.900	Orbital period (years)
a:	3.079	Semi-major axis (arcseconds)
i:	100.4	Inclination (degrees)
Ω:	148.2	Longitude of ascending node (degrees)
T:	2020.470	Epoch of periastron passage (year)
e:	0.932	Eccentricity
ω:	78.9	Longitude of periastron (degrees)
Start-Year:	1924.0	Year
End-Year:	2126.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF566AB,C

Position:	043958.03+532823.7	Epoch-2000 right ascension and declination
WDS-ID:	04400+5328	WDS designation
Discoverer Code:	STF566AB,C	Discover designation and components
ADS number:	3358	Aitken Double Star catalog
HD number:	29316	HD catalog number
Hipparcos number:	21730	Hipparcos catalog number
V1:	5.56	Magnitude of the primary
V2:	7.49	Magnitude of the secondary
Equinox:		Equinox
Date:	2016	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF566AB,C

WDS 6th Orbit including measures of STF566AB,C

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

Ephemeris of STF566AB,C

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.958    321.7
-------------------------
1924.0     1.487    283.0
1925.0     1.474    282.5
1926.0     1.461    282.0
1927.0     1.447    281.5
1928.0     1.434    280.9
1929.0     1.421    280.4
1930.0     1.407    279.8
1931.0     1.394    279.3
1932.0     1.381    278.7
1933.0     1.367    278.1
1934.0     1.353    277.5
1935.0     1.340    276.9
1936.0     1.326    276.3
1937.0     1.312    275.7
1938.0     1.299    275.1
1939.0     1.285    274.4
1940.0     1.271    273.7
1941.0     1.258    273.0
1942.0     1.244    272.3
1943.0     1.230    271.6
1944.0     1.216    270.9
1945.0     1.203    270.1
1946.0     1.189    269.4
1947.0     1.175    268.6
1948.0     1.162    267.8
1949.0     1.148    267.0
1950.0     1.135    266.1
1951.0     1.121    265.3
1952.0     1.108    264.4
1953.0     1.095    263.5
1954.0     1.082    262.6
1955.0     1.069    261.6
1956.0     1.056    260.7
1957.0     1.043    259.7
1958.0     1.030    258.6
1959.0     1.018    257.6
1960.0     1.006    256.5
1961.0     0.993    255.4
1962.0     0.981    254.3
1963.0     0.970    253.2
1964.0     0.958    252.0
1965.0     0.947    250.8
1966.0     0.936    249.5
1967.0     0.925    248.3
1968.0     0.914    247.0
1969.0     0.904    245.6
1970.0     0.894    244.3
1971.0     0.884    242.9
1972.0     0.875    241.5
1973.0     0.865    240.0
1974.0     0.857    238.6
1975.0     0.848    237.1
1976.0     0.840    235.5
1977.0     0.833    234.0
1978.0     0.825    232.4
1979.0     0.819    230.7
1980.0     0.812    229.1
1981.0     0.806    227.4
1982.0     0.801    225.7
1983.0     0.796    224.0
1984.0     0.791    222.3
1985.0     0.787    220.5
1986.0     0.783    218.7
1987.0     0.780    216.9
1988.0     0.777    215.1
1989.0     0.774    213.3
1990.0     0.772    211.5
1991.0     0.771    209.6
1992.0     0.769    207.8
1993.0     0.769    205.9
1994.0     0.768    204.1
1995.0     0.768    202.2
1996.0     0.768    200.4
1997.0     0.769    198.5
1998.0     0.769    196.6
1999.0     0.770    194.8
2000.0     0.771    193.0
2001.0     0.772    191.1
2002.0     0.773    189.3
2003.0     0.774    187.4
2004.0     0.774    185.6
2005.0     0.774    183.8
2006.0     0.774    182.0
2007.0     0.773    180.1
2008.0     0.772    178.3
2009.0     0.769    176.5
2010.0     0.765    174.6
2011.0     0.759    172.7
2012.0     0.750    170.8
2013.0     0.739    168.8
2014.0     0.723    166.8
2015.0     0.702    164.6
2016.0     0.672    162.3
2017.0     0.630    159.7
2018.0     0.567    156.7
2019.0     0.462    152.6
2020.0     0.243    143.7
2021.0     0.212    337.1
2022.0     0.514    327.8
2023.0     0.705    324.8
2024.0     0.846    323.0
2025.0     0.958    321.7
2026.0     1.052    320.6
2027.0     1.133    319.7
2028.0     1.204    318.9
2029.0     1.267    318.2
2030.0     1.324    317.5
2031.0     1.375    316.9
2032.0     1.422    316.3
2033.0     1.465    315.8
2034.0     1.504    315.3
2035.0     1.540    314.8
2036.0     1.574    314.4
2037.0     1.605    314.0
2038.0     1.634    313.5
2039.0     1.660    313.1
2040.0     1.685    312.7
2041.0     1.709    312.4
2042.0     1.730    312.0
2043.0     1.751    311.6
2044.0     1.770    311.3
2045.0     1.787    310.9
2046.0     1.804    310.6
2047.0     1.819    310.3
2048.0     1.833    309.9
2049.0     1.846    309.6
2050.0     1.859    309.3
2051.0     1.870    309.0
2052.0     1.880    308.7
2053.0     1.890    308.4
2054.0     1.899    308.1
2055.0     1.907    307.7
2056.0     1.915    307.4
2057.0     1.921    307.2
2058.0     1.927    306.9
2059.0     1.933    306.6
2060.0     1.938    306.3
2061.0     1.942    306.0
2062.0     1.946    305.7
2063.0     1.949    305.4
2064.0     1.951    305.1
2065.0     1.954    304.8
2066.0     1.955    304.5
2067.0     1.956    304.3
2068.0     1.957    304.0
2069.0     1.957    303.7
2070.0     1.957    303.4
2071.0     1.957    303.1
2072.0     1.956    302.8
2073.0     1.954    302.5
2074.0     1.953    302.2
2075.0     1.951    302.0
2076.0     1.948    301.7
2077.0     1.945    301.4
2078.0     1.942    301.1
2079.0     1.939    300.8
2080.0     1.935    300.5
2081.0     1.931    300.2
2082.0     1.926    299.9
2083.0     1.921    299.6
2084.0     1.916    299.3
2085.0     1.911    299.0
2086.0     1.905    298.7
2087.0     1.899    298.4
2088.0     1.893    298.1
2089.0     1.887    297.8
2090.0     1.880    297.5
2091.0     1.873    297.2
2092.0     1.866    296.9
2093.0     1.859    296.6
2094.0     1.851    296.2
2095.0     1.843    295.9
2096.0     1.835    295.6
2097.0     1.827    295.3
2098.0     1.818    294.9
2099.0     1.810    294.6
2100.0     1.801    294.3
2101.0     1.791    293.9
2102.0     1.782    293.6
2103.0     1.773    293.2
2104.0     1.763    292.9
2105.0     1.753    292.5
2106.0     1.743    292.2
2107.0     1.733    291.8
2108.0     1.722    291.5
2109.0     1.712    291.1
2110.0     1.701    290.7
2111.0     1.690    290.3
2112.0     1.679    289.9
2113.0     1.668    289.6
2114.0     1.657    289.2
2115.0     1.645    288.8
2116.0     1.634    288.3
2117.0     1.622    287.9
2118.0     1.610    287.5
2119.0     1.598    287.1
2120.0     1.586    286.7
2121.0     1.574    286.2
2122.0     1.561    285.8
2123.0     1.549    285.3
2124.0     1.536    284.9
2125.0     1.524    284.4

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.