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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 16:28:35

Orbital Elements for A939
WDS: A939 WDS ID/Discoverer
P: 145.640 Orbital period (years)
a: 0.185 Semi-major axis (arcseconds)
i: 19.4 Inclination (degrees)
Ω: 143.5 Longitude of ascending node (degrees)
T: 1962.500 Epoch of periastron passage (year)
e: 0.196 Eccentricity
ω: 273.6 Longitude of periastron (degrees)
Start-Year: 1953.0 Year
End-Year: 2097.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A939
Position: 012506.75+453631.0 Epoch-2000 right ascension and declination
WDS-ID: 01251+4537 WDS designation
Discoverer Code: A939 Discover designation and components
ADS number: 1126 Aitken Double Star catalog
HD number: 8528 HD catalog number
Hipparcos number: 6633 Hipparcos catalog number
V1: 8.94 Magnitude of the primary
V2: 9.09 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2010 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for A939



WDS 6th Orbit including measures of A939

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


Ephemeris of A939
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.207    218.7
-------------------------
1953.0     0.147     20.7
1954.0     0.146     24.3
1955.0     0.144     28.1
1956.0     0.143     31.8
1957.0     0.143     35.7
1958.0     0.142     39.5
1959.0     0.141     43.5
1960.0     0.141     47.4
1961.0     0.140     51.4
1962.0     0.140     55.3
1963.0     0.140     59.3
1964.0     0.141     63.3
1965.0     0.141     67.2
1966.0     0.142     71.1
1967.0     0.142     75.0
1968.0     0.143     78.9
1969.0     0.144     82.6
1970.0     0.145     86.4
1971.0     0.147     90.0
1972.0     0.148     93.7
1973.0     0.149     97.2
1974.0     0.151    100.7
1975.0     0.153    104.1
1976.0     0.154    107.4
1977.0     0.156    110.6
1978.0     0.158    113.8
1979.0     0.159    116.9
1980.0     0.161    120.0
1981.0     0.163    123.0
1982.0     0.165    125.9
1983.0     0.166    128.7
1984.0     0.168    131.5
1985.0     0.170    134.3
1986.0     0.172    136.9
1987.0     0.173    139.6
1988.0     0.175    142.2
1989.0     0.176    144.7
1990.0     0.178    147.2
1991.0     0.180    149.6
1992.0     0.181    152.0
1993.0     0.182    154.4
1994.0     0.184    156.7
1995.0     0.185    159.0
1996.0     0.186    161.3
1997.0     0.188    163.5
1998.0     0.189    165.8
1999.0     0.190    167.9
2000.0     0.191    170.1
2001.0     0.192    172.2
2002.0     0.193    174.3
2003.0     0.194    176.4
2004.0     0.195    178.5
2005.0     0.196    180.5
2006.0     0.197    182.5
2007.0     0.198    184.5
2008.0     0.199    186.5
2009.0     0.199    188.5
2010.0     0.200    190.5
2011.0     0.201    192.4
2012.0     0.201    194.4
2013.0     0.202    196.3
2014.0     0.203    198.2
2015.0     0.203    200.1
2016.0     0.204    202.0
2017.0     0.204    203.9
2018.0     0.205    205.8
2019.0     0.205    207.6
2020.0     0.205    209.5
2021.0     0.206    211.3
2022.0     0.206    213.2
2023.0     0.206    215.0
2024.0     0.207    216.8
2025.0     0.207    218.7
2026.0     0.207    220.5
2027.0     0.208    222.3
2028.0     0.208    224.1
2029.0     0.208    225.9
2030.0     0.208    227.7
2031.0     0.208    229.5
2032.0     0.208    231.3
2033.0     0.209    233.1
2034.0     0.209    234.9
2035.0     0.209    236.7
2036.0     0.209    238.5
2037.0     0.209    240.3
2038.0     0.209    242.1
2039.0     0.209    243.9
2040.0     0.209    245.7
2041.0     0.209    247.5
2042.0     0.209    249.3
2043.0     0.208    251.1
2044.0     0.208    252.9
2045.0     0.208    254.7
2046.0     0.208    256.5
2047.0     0.208    258.3
2048.0     0.207    260.2
2049.0     0.207    262.0
2050.0     0.207    263.8
2051.0     0.207    265.6
2052.0     0.206    267.5
2053.0     0.206    269.3
2054.0     0.205    271.2
2055.0     0.205    273.0
2056.0     0.204    274.9
2057.0     0.204    276.8
2058.0     0.203    278.7
2059.0     0.203    280.6
2060.0     0.202    282.5
2061.0     0.201    284.4
2062.0     0.200    286.3
2063.0     0.200    288.3
2064.0     0.199    290.3
2065.0     0.198    292.3
2066.0     0.197    294.3
2067.0     0.196    296.3
2068.0     0.195    298.3
2069.0     0.194    300.4
2070.0     0.193    302.5
2071.0     0.192    304.6
2072.0     0.191    306.7
2073.0     0.189    308.9
2074.0     0.188    311.1
2075.0     0.187    313.3
2076.0     0.185    315.6
2077.0     0.184    317.9
2078.0     0.182    320.2
2079.0     0.181    322.6
2080.0     0.179    325.0
2081.0     0.177    327.5
2082.0     0.176    330.0
2083.0     0.174    332.6
2084.0     0.172    335.2
2085.0     0.171    337.8
2086.0     0.169    340.6
2087.0     0.167    343.3
2088.0     0.165    346.2
2089.0     0.163    349.1
2090.0     0.161    352.0
2091.0     0.160    355.1
2092.0     0.158    358.2
2093.0     0.156      1.4
2094.0     0.154      4.6
2095.0     0.153      8.0
2096.0     0.151     11.4






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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