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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:05:42

Orbital Elements for A7
WDS: A7 WDS ID/Discoverer
P: 204.320 Orbital period (years)
a: 0.447 Semi-major axis (arcseconds)
i: 105.1 Inclination (degrees)
Ω: 93.3 Longitude of ascending node (degrees)
T: 2050.540 Epoch of periastron passage (year)
e: 0.656 Eccentricity
ω: 59.8 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 A7
Position: 112943.17-061831.3 Epoch-2000 right ascension and declination
WDS-ID: 11297-0619 WDS designation
Discoverer Code: A7 Discover designation and components
ADS number: 8182 Aitken Double Star catalog
HD number: 99917 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.7 Magnitude of the primary
V2: 9.7 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2014 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for A7



WDS 6th Orbit including measures of A7

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


Ephemeris of A7
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.197    122.6
-------------------------
1923.0     0.500    257.6
1924.0     0.497    257.4
1925.0     0.495    257.1
1926.0     0.492    256.8
1927.0     0.489    256.5
1928.0     0.486    256.2
1929.0     0.483    255.9
1930.0     0.480    255.6
1931.0     0.477    255.3
1932.0     0.474    255.0
1933.0     0.470    254.7
1934.0     0.467    254.4
1935.0     0.463    254.1
1936.0     0.460    253.7
1937.0     0.456    253.4
1938.0     0.452    253.1
1939.0     0.448    252.7
1940.0     0.444    252.4
1941.0     0.440    252.0
1942.0     0.436    251.7
1943.0     0.432    251.3
1944.0     0.427    250.9
1945.0     0.423    250.5
1946.0     0.419    250.2
1947.0     0.414    249.8
1948.0     0.410    249.3
1949.0     0.405    248.9
1950.0     0.400    248.5
1951.0     0.396    248.1
1952.0     0.391    247.6
1953.0     0.386    247.2
1954.0     0.381    246.7
1955.0     0.376    246.2
1956.0     0.371    245.7
1957.0     0.366    245.2
1958.0     0.361    244.7
1959.0     0.356    244.1
1960.0     0.351    243.6
1961.0     0.345    243.0
1962.0     0.340    242.4
1963.0     0.335    241.8
1964.0     0.329    241.2
1965.0     0.324    240.5
1966.0     0.319    239.9
1967.0     0.313    239.2
1968.0     0.308    238.5
1969.0     0.302    237.7
1970.0     0.297    236.9
1971.0     0.291    236.1
1972.0     0.286    235.3
1973.0     0.280    234.4
1974.0     0.275    233.5
1975.0     0.269    232.6
1976.0     0.264    231.6
1977.0     0.258    230.6
1978.0     0.253    229.6
1979.0     0.247    228.4
1980.0     0.242    227.3
1981.0     0.236    226.1
1982.0     0.231    224.8
1983.0     0.226    223.5
1984.0     0.221    222.1
1985.0     0.216    220.6
1986.0     0.211    219.1
1987.0     0.206    217.5
1988.0     0.201    215.8
1989.0     0.196    214.1
1990.0     0.191    212.2
1991.0     0.187    210.3
1992.0     0.183    208.3
1993.0     0.179    206.2
1994.0     0.175    203.9
1995.0     0.171    201.6
1996.0     0.168    199.2
1997.0     0.165    196.7
1998.0     0.162    194.1
1999.0     0.159    191.4
2000.0     0.157    188.6
2001.0     0.155    185.8
2002.0     0.153    182.8
2003.0     0.152    179.9
2004.0     0.151    176.8
2005.0     0.150    173.8
2006.0     0.150    170.7
2007.0     0.150    167.6
2008.0     0.150    164.5
2009.0     0.151    161.5
2010.0     0.152    158.5
2011.0     0.154    155.5
2012.0     0.156    152.6
2013.0     0.158    149.8
2014.0     0.160    147.0
2015.0     0.163    144.4
2016.0     0.165    141.8
2017.0     0.168    139.3
2018.0     0.172    136.9
2019.0     0.175    134.6
2020.0     0.179    132.4
2021.0     0.182    130.3
2022.0     0.186    128.2
2023.0     0.190    126.3
2024.0     0.193    124.4
2025.0     0.197    122.6
2026.0     0.201    120.8
2027.0     0.204    119.1
2028.0     0.207    117.5
2029.0     0.211    115.9
2030.0     0.214    114.4
2031.0     0.217    112.9
2032.0     0.219    111.4
2033.0     0.221    110.0
2034.0     0.223    108.6
2035.0     0.224    107.2
2036.0     0.225    105.8
2037.0     0.225    104.4
2038.0     0.224    103.1
2039.0     0.222    101.7
2040.0     0.220    100.3
2041.0     0.216     98.8
2042.0     0.210     97.3
2043.0     0.203     95.7
2044.0     0.195     93.9
2045.0     0.184     92.0
2046.0     0.171     89.8
2047.0     0.156     87.2
2048.0     0.138     84.0
2049.0     0.118     79.8
2050.0     0.097     73.7
2051.0     0.075     64.2
2052.0     0.055     47.0
2053.0     0.043     16.0
2054.0     0.047    339.4
2055.0     0.064    316.1
2056.0     0.087    303.7
2057.0     0.110    296.4
2058.0     0.133    291.7
2059.0     0.156    288.4
2060.0     0.177    285.9
2061.0     0.198    283.9
2062.0     0.218    282.3
2063.0     0.236    280.9
2064.0     0.254    279.8
2065.0     0.271    278.8
2066.0     0.287    277.9
2067.0     0.302    277.1
2068.0     0.316    276.4
2069.0     0.329    275.7
2070.0     0.342    275.1
2071.0     0.354    274.5
2072.0     0.365    274.0
2073.0     0.376    273.5
2074.0     0.387    273.0
2075.0     0.396    272.5
2076.0     0.405    272.1
2077.0     0.414    271.7
2078.0     0.422    271.3
2079.0     0.430    270.9
2080.0     0.438    270.6
2081.0     0.445    270.2
2082.0     0.451    269.9
2083.0     0.457    269.5
2084.0     0.463    269.2
2085.0     0.469    268.9
2086.0     0.474    268.6
2087.0     0.479    268.3
2088.0     0.483    268.0
2089.0     0.488    267.7
2090.0     0.492    267.4
2091.0     0.495    267.1
2092.0     0.499    266.8
2093.0     0.502    266.5
2094.0     0.505    266.3
2095.0     0.508    266.0
2096.0     0.510    265.7
2097.0     0.513    265.5
2098.0     0.515    265.2
2099.0     0.516    264.9
2100.0     0.518    264.7
2101.0     0.520    264.4
2102.0     0.521    264.2
2103.0     0.522    263.9
2104.0     0.523    263.7
2105.0     0.523    263.4
2106.0     0.524    263.2
2107.0     0.524    262.9
2108.0     0.524    262.7
2109.0     0.524    262.4
2110.0     0.524    262.1
2111.0     0.524    261.9
2112.0     0.524    261.6
2113.0     0.523    261.4
2114.0     0.522    261.1
2115.0     0.521    260.9
2116.0     0.520    260.6
2117.0     0.519    260.4
2118.0     0.518    260.1
2119.0     0.516    259.9
2120.0     0.515    259.6
2121.0     0.513    259.3
2122.0     0.511    259.1
2123.0     0.510    258.8
2124.0     0.507    258.5
2125.0     0.505    258.3
2126.0     0.503    258.0






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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