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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:31:39

Orbital Elements for A308
WDS: A308 WDS ID/Discoverer
P: 174.380 Orbital period (years)
a: 0.2 Semi-major axis (arcseconds)
i: 68.4 Inclination (degrees)
Ω: 305.7 Longitude of ascending node (degrees)
T: 2015.310 Epoch of periastron passage (year)
e: 0.059 Eccentricity
ω: 26.1 Longitude of periastron (degrees)
Start-Year: 1938.0 Year
End-Year: 2112.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A308
Position: 220729.16+253811.4 Epoch-2000 right ascension and declination
WDS-ID: 22075+2538 WDS designation
Discoverer Code: A308 Discover designation and components
ADS number: 15650 Aitken Double Star catalog
HD number: 210103 HD catalog number
Hipparcos number: 109211 Hipparcos catalog number
V1: 8.83 Magnitude of the primary
V2: 9.38 Magnitude of the secondary
Equinox: Equinox
Date: 2006 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for A308



WDS 6th Orbit including measures of A308

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


Ephemeris of A308
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.135    328.4
-------------------------
1938.0     0.161    145.5
1939.0     0.157    146.7
1940.0     0.152    147.9
1941.0     0.148    149.3
1942.0     0.144    150.7
1943.0     0.140    152.2
1944.0     0.135    153.8
1945.0     0.131    155.5
1946.0     0.126    157.4
1947.0     0.122    159.4
1948.0     0.117    161.5
1949.0     0.113    163.8
1950.0     0.109    166.2
1951.0     0.104    168.9
1952.0     0.100    171.8
1953.0     0.096    175.0
1954.0     0.092    178.4
1955.0     0.089    182.1
1956.0     0.086    186.1
1957.0     0.083    190.4
1958.0     0.080    194.9
1959.0     0.078    199.7
1960.0     0.077    204.8
1961.0     0.076    210.0
1962.0     0.075    215.3
1963.0     0.075    220.7
1964.0     0.076    226.0
1965.0     0.077    231.1
1966.0     0.079    236.1
1967.0     0.081    240.8
1968.0     0.084    245.3
1969.0     0.087    249.5
1970.0     0.090    253.4
1971.0     0.094    257.0
1972.0     0.097    260.3
1973.0     0.101    263.4
1974.0     0.106    266.2
1975.0     0.110    268.8
1976.0     0.114    271.2
1977.0     0.118    273.5
1978.0     0.123    275.6
1979.0     0.127    277.5
1980.0     0.131    279.3
1981.0     0.135    281.1
1982.0     0.140    282.7
1983.0     0.144    284.2
1984.0     0.148    285.6
1985.0     0.152    287.0
1986.0     0.155    288.2
1987.0     0.159    289.5
1988.0     0.162    290.7
1989.0     0.165    291.8
1990.0     0.169    292.9
1991.0     0.171    293.9
1992.0     0.174    294.9
1993.0     0.177    295.9
1994.0     0.179    296.9
1995.0     0.181    297.8
1996.0     0.183    298.7
1997.0     0.185    299.6
1998.0     0.186    300.5
1999.0     0.187    301.4
2000.0     0.188    302.3
2001.0     0.189    303.1
2002.0     0.189    304.0
2003.0     0.189    304.8
2004.0     0.189    305.7
2005.0     0.189    306.5
2006.0     0.188    307.4
2007.0     0.188    308.2
2008.0     0.187    309.1
2009.0     0.185    310.0
2010.0     0.184    310.8
2011.0     0.182    311.8
2012.0     0.180    312.7
2013.0     0.178    313.6
2014.0     0.175    314.6
2015.0     0.173    315.6
2016.0     0.170    316.6
2017.0     0.167    317.7
2018.0     0.163    318.8
2019.0     0.160    320.0
2020.0     0.156    321.2
2021.0     0.152    322.5
2022.0     0.148    323.8
2023.0     0.144    325.2
2024.0     0.140    326.8
2025.0     0.135    328.4
2026.0     0.131    330.1
2027.0     0.126    331.9
2028.0     0.122    333.9
2029.0     0.117    336.0
2030.0     0.113    338.3
2031.0     0.108    340.8
2032.0     0.103    343.5
2033.0     0.099    346.5
2034.0     0.095    349.7
2035.0     0.090    353.3
2036.0     0.087    357.2
2037.0     0.083      1.4
2038.0     0.080      6.0
2039.0     0.077     10.9
2040.0     0.075     16.2
2041.0     0.073     21.8
2042.0     0.072     27.5
2043.0     0.072     33.4
2044.0     0.072     39.4
2045.0     0.073     45.2
2046.0     0.074     50.9
2047.0     0.076     56.2
2048.0     0.079     61.3
2049.0     0.082     66.0
2050.0     0.085     70.3
2051.0     0.089     74.3
2052.0     0.093     78.0
2053.0     0.098     81.3
2054.0     0.102     84.4
2055.0     0.107     87.1
2056.0     0.111     89.7
2057.0     0.116     92.0
2058.0     0.121     94.2
2059.0     0.126     96.2
2060.0     0.131     98.0
2061.0     0.135     99.8
2062.0     0.140    101.4
2063.0     0.145    102.9
2064.0     0.149    104.3
2065.0     0.153    105.6
2066.0     0.158    106.8
2067.0     0.162    108.0
2068.0     0.166    109.2
2069.0     0.170    110.2
2070.0     0.174    111.3
2071.0     0.177    112.3
2072.0     0.181    113.2
2073.0     0.184    114.1
2074.0     0.187    115.0
2075.0     0.190    115.9
2076.0     0.193    116.7
2077.0     0.195    117.5
2078.0     0.198    118.3
2079.0     0.200    119.0
2080.0     0.202    119.8
2081.0     0.204    120.5
2082.0     0.205    121.3
2083.0     0.207    122.0
2084.0     0.208    122.7
2085.0     0.209    123.4
2086.0     0.209    124.1
2087.0     0.210    124.8
2088.0     0.210    125.5
2089.0     0.211    126.1
2090.0     0.210    126.8
2091.0     0.210    127.5
2092.0     0.210    128.2
2093.0     0.209    128.9
2094.0     0.208    129.6
2095.0     0.207    130.3
2096.0     0.206    131.0
2097.0     0.205    131.7
2098.0     0.203    132.5
2099.0     0.201    133.2
2100.0     0.199    134.0
2101.0     0.197    134.7
2102.0     0.195    135.5
2103.0     0.192    136.3
2104.0     0.189    137.2
2105.0     0.186    138.0
2106.0     0.183    138.9
2107.0     0.180    139.8
2108.0     0.177    140.8
2109.0     0.173    141.8
2110.0     0.170    142.8
2111.0     0.166    143.9






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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