Double Star Calculator - Orbit

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: 1952.18 Year
End-Year: 2097.82 Year
Epoch: 2026.5 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
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Msn2014b Reference

Double Star Orbit for A939



WDS 6th Orbit including measures of A939

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


Legend:
Green plus signs:Visual (micrometric) measures
Violet asterisks:Photographic measures
Blue symbols:Various interferometric techniques
Dot-dash line:Indicates the line of nodes

Ephemeris of A939
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.207   221.40
--------------------------
1952.18    0.148    17.74
1953.18    0.147    21.34
1954.18    0.145    25.01
1955.18    0.144    28.74
1956.18    0.143    32.52
1957.18    0.142    36.36
1958.18    0.142    40.24
1959.18    0.141    44.16
1960.18    0.141    48.11
1961.18    0.140    52.07
1962.18    0.140    56.04
1963.18    0.140    60.02
1964.18    0.141    63.98
1965.18    0.141    67.92
1966.18    0.142    71.83
1967.18    0.142    75.71
1968.18    0.143    79.54
1969.18    0.144    83.32
1970.18    0.146    87.04
1971.18    0.147    90.70
1972.18    0.148    94.29
1973.18    0.150    97.82
1974.18    0.151   101.27
1975.18    0.153   104.66
1976.18    0.155   107.97
1977.18    0.156   111.21
1978.18    0.158   114.38
1979.18    0.160   117.49
1980.18    0.161   120.52
1981.18    0.163   123.49
1982.18    0.165   126.39
1983.18    0.167   129.24
1984.18    0.168   132.02
1985.18    0.170   134.75
1986.18    0.172   137.43
1987.18    0.174   140.05
1988.18    0.175   142.62
1989.18    0.177   145.15
1990.18    0.178   147.63
1991.18    0.180   150.07
1992.18    0.181   152.47
1993.18    0.183   154.83
1994.18    0.184   157.16
1995.18    0.185   159.45
1996.18    0.187   161.71
1997.18    0.188   163.94
1998.18    0.189   166.15
1999.18    0.190   168.32
2000.18    0.191   170.47
2001.18    0.192   172.59
2002.18    0.193   174.70
2003.18    0.194   176.78
2004.18    0.195   178.84
2005.18    0.196   180.88
2006.18    0.197   182.90
2007.18    0.198   184.91
2008.18    0.199   186.90
2009.18    0.199   188.87
2010.18    0.200   190.83
2011.18    0.201   192.78
2012.18    0.201   194.71
2013.18    0.202   196.63
2014.18    0.203   198.55
2015.18    0.203   200.45
2016.18    0.204   202.34
2017.18    0.204   204.22
2018.18    0.205   206.09
2019.18    0.205   207.95
2020.18    0.205   209.81
2021.18    0.206   211.66
2022.18    0.206   213.50
2023.18    0.207   215.34
2024.18    0.207   217.17
2025.18    0.207   219.00
2026.18    0.207   220.82
2027.18    0.208   222.64
2028.18    0.208   224.45
2029.18    0.208   226.26
2030.18    0.208   228.07
2031.18    0.208   229.87
2032.18    0.208   231.67
2033.18    0.209   233.47
2034.18    0.209   235.27
2035.18    0.209   237.06
2036.18    0.209   238.86
2037.18    0.209   240.66
2038.18    0.209   242.45
2039.18    0.209   244.24
2040.18    0.209   246.04
2041.18    0.209   247.84
2042.18    0.209   249.64
2043.18    0.208   251.44
2044.18    0.208   253.24
2045.18    0.208   255.04
2046.18    0.208   256.85
2047.18    0.208   258.67
2048.18    0.207   260.48
2049.18    0.207   262.30
2050.18    0.207   264.13
2051.18    0.206   265.96
2052.18    0.206   267.80
2053.18    0.206   269.65
2054.18    0.205   271.50
2055.18    0.205   273.36
2056.18    0.204   275.23
2057.18    0.204   277.11
2058.18    0.203   279.01
2059.18    0.202   280.91
2060.18    0.202   282.82
2061.18    0.201   284.75
2062.18    0.200   286.69
2063.18    0.200   288.65
2064.18    0.199   290.62
2065.18    0.198   292.61
2066.18    0.197   294.62
2067.18    0.196   296.65
2068.18    0.195   298.70
2069.18    0.194   300.77
2070.18    0.193   302.87
2071.18    0.192   304.98
2072.18    0.190   307.13
2073.18    0.189   309.31
2074.18    0.188   311.51
2075.18    0.186   313.75
2076.18    0.185   316.02
2077.18    0.183   318.32
2078.18    0.182   320.67
2079.18    0.180   323.05
2080.18    0.179   325.47
2081.18    0.177   327.94
2082.18    0.175   330.46
2083.18    0.174   333.03
2084.18    0.172   335.65
2085.18    0.170   338.32
2086.18    0.168   341.05
2087.18    0.167   343.84
2088.18    0.165   346.69
2089.18    0.163   349.61
2090.18    0.161   352.59
2091.18    0.159   355.64
2092.18    0.157   358.77
2093.18    0.156     1.96
2094.18    0.154     5.23
2095.18    0.152     8.57
2096.18    0.151    11.98
2097.18    0.149    15.47



 

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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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Report created:   2026-06-25 14:50:34


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