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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:59:07

Orbital Elements for A556AB
WDS: A556AB WDS ID/Discoverer
P: 205.000 Orbital period (years)
a: 1.334 Semi-major axis (arcseconds)
i: 54.2 Inclination (degrees)
Ω: 63.2 Longitude of ascending node (degrees)
T: 2048.600 Epoch of periastron passage (year)
e: 0.301 Eccentricity
ω: 219.7 Longitude of periastron (degrees)
Start-Year: 1923.0 Year
End-Year: 2127.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A556AB
Position: 103700.02-085023.6 Epoch-2000 right ascension and declination
WDS-ID: 10370-0850 WDS designation
Discoverer Code: A556AB Discover designation and components
ADS number: 7854 Aitken Double Star catalog
HD number: 91962 HD catalog number
Hipparcos number: 51966 Hipparcos catalog number
V1: 7.1 Magnitude of the primary
V2: 9.80 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2015 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for A556AB



WDS 6th Orbit including measures of A556AB

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


Ephemeris of A556AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.001    223.2
-------------------------
1923.0     1.632     72.9
1924.0     1.631     73.6
1925.0     1.630     74.2
1926.0     1.628     74.9
1927.0     1.625     75.5
1928.0     1.622     76.2
1929.0     1.618     76.9
1930.0     1.614     77.5
1931.0     1.610     78.2
1932.0     1.604     78.9
1933.0     1.599     79.6
1934.0     1.593     80.2
1935.0     1.586     80.9
1936.0     1.579     81.6
1937.0     1.572     82.3
1938.0     1.564     83.0
1939.0     1.555     83.8
1940.0     1.547     84.5
1941.0     1.537     85.2
1942.0     1.528     86.0
1943.0     1.518     86.7
1944.0     1.507     87.5
1945.0     1.497     88.2
1946.0     1.486     89.0
1947.0     1.474     89.8
1948.0     1.462     90.6
1949.0     1.450     91.5
1950.0     1.438     92.3
1951.0     1.425     93.1
1952.0     1.412     94.0
1953.0     1.399     94.9
1954.0     1.385     95.8
1955.0     1.371     96.7
1956.0     1.357     97.6
1957.0     1.343     98.6
1958.0     1.328     99.6
1959.0     1.314    100.6
1960.0     1.299    101.6
1961.0     1.284    102.6
1962.0     1.269    103.7
1963.0     1.253    104.8
1964.0     1.238    105.9
1965.0     1.223    107.1
1966.0     1.207    108.3
1967.0     1.192    109.5
1968.0     1.176    110.7
1969.0     1.161    112.0
1970.0     1.145    113.3
1971.0     1.130    114.7
1972.0     1.115    116.0
1973.0     1.099    117.5
1974.0     1.084    118.9
1975.0     1.070    120.4
1976.0     1.055    122.0
1977.0     1.041    123.6
1978.0     1.027    125.2
1979.0     1.013    126.9
1980.0     0.999    128.6
1981.0     0.986    130.4
1982.0     0.974    132.2
1983.0     0.962    134.0
1984.0     0.950    135.9
1985.0     0.939    137.9
1986.0     0.929    139.9
1987.0     0.919    141.9
1988.0     0.910    144.0
1989.0     0.901    146.2
1990.0     0.893    148.3
1991.0     0.886    150.5
1992.0     0.880    152.8
1993.0     0.874    155.0
1994.0     0.869    157.3
1995.0     0.865    159.6
1996.0     0.862    162.0
1997.0     0.860    164.3
1998.0     0.859    166.7
1999.0     0.858    169.1
2000.0     0.858    171.4
2001.0     0.859    173.8
2002.0     0.861    176.1
2003.0     0.863    178.5
2004.0     0.866    180.8
2005.0     0.870    183.1
2006.0     0.875    185.4
2007.0     0.880    187.7
2008.0     0.885    189.9
2009.0     0.892    192.1
2010.0     0.898    194.3
2011.0     0.905    196.5
2012.0     0.912    198.6
2013.0     0.920    200.7
2014.0     0.927    202.7
2015.0     0.935    204.7
2016.0     0.943    206.7
2017.0     0.950    208.6
2018.0     0.958    210.5
2019.0     0.965    212.4
2020.0     0.972    214.3
2021.0     0.979    216.1
2022.0     0.985    217.9
2023.0     0.991    219.7
2024.0     0.996    221.5
2025.0     1.001    223.2
2026.0     1.005    225.0
2027.0     1.008    226.7
2028.0     1.010    228.4
2029.0     1.012    230.1
2030.0     1.012    231.8
2031.0     1.011    233.5
2032.0     1.009    235.2
2033.0     1.006    236.9
2034.0     1.002    238.7
2035.0     0.996    240.4
2036.0     0.990    242.2
2037.0     0.981    244.0
2038.0     0.972    245.8
2039.0     0.961    247.7
2040.0     0.949    249.6
2041.0     0.936    251.5
2042.0     0.921    253.6
2043.0     0.905    255.6
2044.0     0.888    257.8
2045.0     0.870    260.1
2046.0     0.851    262.4
2047.0     0.831    264.9
2048.0     0.810    267.5
2049.0     0.789    270.2
2050.0     0.768    273.1
2051.0     0.746    276.1
2052.0     0.725    279.4
2053.0     0.704    282.8
2054.0     0.685    286.4
2055.0     0.666    290.2
2056.0     0.648    294.2
2057.0     0.632    298.5
2058.0     0.619    303.0
2059.0     0.607    307.6
2060.0     0.599    312.4
2061.0     0.593    317.3
2062.0     0.590    322.3
2063.0     0.591    327.3
2064.0     0.594    332.3
2065.0     0.601    337.2
2066.0     0.611    341.9
2067.0     0.623    346.5
2068.0     0.639    350.9
2069.0     0.656    355.1
2070.0     0.676    359.0
2071.0     0.697      2.7
2072.0     0.720      6.2
2073.0     0.745      9.4
2074.0     0.770     12.4
2075.0     0.796     15.3
2076.0     0.823     18.0
2077.0     0.850     20.4
2078.0     0.878     22.8
2079.0     0.906     25.0
2080.0     0.934     27.0
2081.0     0.962     29.0
2082.0     0.989     30.8
2083.0     1.017     32.5
2084.0     1.044     34.2
2085.0     1.071     35.7
2086.0     1.097     37.2
2087.0     1.123     38.6
2088.0     1.148     40.0
2089.0     1.173     41.3
2090.0     1.198     42.5
2091.0     1.222     43.7
2092.0     1.245     44.9
2093.0     1.267     46.0
2094.0     1.289     47.0
2095.0     1.310     48.1
2096.0     1.331     49.1
2097.0     1.351     50.0
2098.0     1.370     51.0
2099.0     1.389     51.9
2100.0     1.406     52.8
2101.0     1.423     53.7
2102.0     1.440     54.5
2103.0     1.456     55.3
2104.0     1.471     56.2
2105.0     1.485     56.9
2106.0     1.499     57.7
2107.0     1.512     58.5
2108.0     1.524     59.3
2109.0     1.535     60.0
2110.0     1.546     60.7
2111.0     1.557     61.5
2112.0     1.566     62.2
2113.0     1.575     62.9
2114.0     1.583     63.6
2115.0     1.591     64.3
2116.0     1.598     65.0
2117.0     1.604     65.6
2118.0     1.610     66.3
2119.0     1.615     67.0
2120.0     1.619     67.7
2121.0     1.623     68.3
2122.0     1.626     69.0
2123.0     1.628     69.6
2124.0     1.630     70.3
2125.0     1.632     70.9
2126.0     1.632     71.6






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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