Double Star Calculator - Orbit

Orbital Elements for A2102

WDS:	A2102	WDS ID/Discoverer
P:	162.000	Orbital period (years)
a:	0.607	Semi-major axis (arcseconds)
i:	101.7	Inclination (degrees)
Ω:	151.2	Longitude of ascending node (degrees)
T:	2101.000	Epoch of periastron passage (year)
e:	0.447	Eccentricity
ω:	262.8	Longitude of periastron (degrees)
Start-Year:	1944.0	Year
End-Year:	2106.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2102
Position:	011546.78+094705.3	Epoch-2000 right ascension and declination
WDS-ID:	01158+0947	WDS designation
Discoverer Code:	A2102	Discover designation and components
ADS number:	1016	Aitken Double Star catalog
HD number:	7564	HD catalog number
Hipparcos number:	5898	Hipparcos catalog number
V1:	7.36	Magnitude of the primary
V2:	9.89	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	RAO2015	Reference

Double Star Orbit for A2102

WDS 6th Orbit including measures of A2102

-- 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 A2102

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.178    66.17
--------------------------
1944.00    0.159   175.39
1945.00    0.190   170.47
1946.00    0.222   166.96
1947.00    0.252   164.31
1948.00    0.282   162.22
1949.00    0.310   160.52
1950.00    0.336   159.10
1951.00    0.361   157.87
1952.00    0.384   156.80
1953.00    0.406   155.85
1954.00    0.427   155.00
1955.00    0.445   154.22
1956.00    0.463   153.49
1957.00    0.478   152.82
1958.00    0.493   152.19
1959.00    0.506   151.60
1960.00    0.518   151.03
1961.00    0.529   150.49
1962.00    0.538   149.97
1963.00    0.547   149.46
1964.00    0.554   148.97
1965.00    0.561   148.50
1966.00    0.566   148.03
1967.00    0.571   147.57
1968.00    0.574   147.12
1969.00    0.577   146.67
1970.00    0.579   146.22
1971.00    0.580   145.78
1972.00    0.581   145.34
1973.00    0.581   144.90
1974.00    0.580   144.46
1975.00    0.579   144.02
1976.00    0.577   143.57
1977.00    0.574   143.13
1978.00    0.571   142.67
1979.00    0.568   142.21
1980.00    0.564   141.75
1981.00    0.559   141.28
1982.00    0.554   140.80
1983.00    0.549   140.31
1984.00    0.543   139.81
1985.00    0.536   139.30
1986.00    0.530   138.78
1987.00    0.523   138.24
1988.00    0.516   137.69
1989.00    0.508   137.13
1990.00    0.500   136.54
1991.00    0.492   135.94
1992.00    0.483   135.31
1993.00    0.475   134.66
1994.00    0.466   133.99
1995.00    0.456   133.29
1996.00    0.447   132.57
1997.00    0.437   131.81
1998.00    0.427   131.01
1999.00    0.418   130.18
2000.00    0.407   129.31
2001.00    0.397   128.39
2002.00    0.387   127.42
2003.00    0.376   126.40
2004.00    0.366   125.32
2005.00    0.355   124.18
2006.00    0.345   122.96
2007.00    0.334   121.67
2008.00    0.323   120.30
2009.00    0.313   118.83
2010.00    0.302   117.25
2011.00    0.292   115.57
2012.00    0.281   113.75
2013.00    0.271   111.80
2014.00    0.261   109.70
2015.00    0.251   107.44
2016.00    0.242   104.99
2017.00    0.233   102.35
2018.00    0.224    99.50
2019.00    0.216    96.43
2020.00    0.208    93.12
2021.00    0.201    89.57
2022.00    0.195    85.78
2023.00    0.189    81.76
2024.00    0.185    77.52
2025.00    0.181    73.09
2026.00    0.179    68.50
2027.00    0.177    63.81
2028.00    0.177    59.07
2029.00    0.178    54.35
2030.00    0.180    49.69
2031.00    0.183    45.15
2032.00    0.186    40.79
2033.00    0.191    36.62
2034.00    0.197    32.68
2035.00    0.204    28.98
2036.00    0.211    25.51
2037.00    0.219    22.29
2038.00    0.227    19.30
2039.00    0.236    16.52
2040.00    0.245    13.94
2041.00    0.254    11.56
2042.00    0.264     9.35
2043.00    0.274     7.30
2044.00    0.284     5.39
2045.00    0.294     3.61
2046.00    0.305     1.96
2047.00    0.315     0.41
2048.00    0.325   358.96
2049.00    0.336   357.60
2050.00    0.346   356.33
2051.00    0.356   355.12
2052.00    0.366   353.98
2053.00    0.376   352.91
2054.00    0.386   351.89
2055.00    0.396   350.92
2056.00    0.406   349.99
2057.00    0.415   349.11
2058.00    0.424   348.26
2059.00    0.433   347.45
2060.00    0.441   346.67
2061.00    0.449   345.92
2062.00    0.457   345.20
2063.00    0.464   344.50
2064.00    0.471   343.82
2065.00    0.478   343.16
2066.00    0.484   342.52
2067.00    0.490   341.89
2068.00    0.495   341.28
2069.00    0.499   340.68
2070.00    0.503   340.09
2071.00    0.507   339.51
2072.00    0.509   338.93
2073.00    0.511   338.36
2074.00    0.512   337.79
2075.00    0.513   337.23
2076.00    0.512   336.66
2077.00    0.511   336.10
2078.00    0.509   335.52
2079.00    0.505   334.95
2080.00    0.501   334.36
2081.00    0.495   333.76
2082.00    0.488   333.15
2083.00    0.480   332.51
2084.00    0.470   331.85
2085.00    0.459   331.17
2086.00    0.447   330.44
2087.00    0.433   329.68
2088.00    0.417   328.85
2089.00    0.399   327.96
2090.00    0.380   326.99
2091.00    0.359   325.90
2092.00    0.336   324.67
2093.00    0.311   323.25
2094.00    0.285   321.58
2095.00    0.256   319.54
2096.00    0.227   316.99
2097.00    0.196   313.65
2098.00    0.164   309.04
2099.00    0.133   302.25
2100.00    0.104   291.43
2101.00    0.080   273.12
2102.00    0.068   244.69
2103.00    0.076   214.86
2104.00    0.098   194.67
2105.00    0.127   182.76

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 14:49:06