Double Star Calculator - Orbit

Orbital Elements for A1281AB

WDS:	A1281AB	WDS ID/Discoverer
P:	158.270	Orbital period (years)
a:	0.52	Semi-major axis (arcseconds)
i:	43.8	Inclination (degrees)
Ω:	167.5	Longitude of ascending node (degrees)
T:	1938.150	Epoch of periastron passage (year)
e:	0.354	Eccentricity
ω:	149.6	Longitude of periastron (degrees)
Start-Year:	1945.865	Year
End-Year:	2104.135	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1281AB
Position:	025139.69+455844.9	Epoch-2000 right ascension and declination
WDS-ID:	02517+4559	WDS designation
Discoverer Code:	A1281AB	Discover designation and components
ADS number:	2173	Aitken Double Star catalog
HD number:	17647	HD catalog number
Hipparcos number:	13336	Hipparcos catalog number
V1:	8.97	Magnitude of the primary
V2:	10.72	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Hrt2014a	Reference

Double Star Orbit for A1281AB

WDS 6th Orbit including measures of A1281AB

-- 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 A1281AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.678   153.06
--------------------------
1945.87    0.354   352.89
1946.87    0.357   356.17
1947.87    0.359   359.42
1948.87    0.361     2.62
1949.87    0.362     5.80
1950.87    0.363     8.96
1951.87    0.364    12.10
1952.87    0.364    15.24
1953.87    0.364    18.37
1954.87    0.364    21.51
1955.87    0.364    24.64
1956.87    0.364    27.77
1957.87    0.364    30.90
1958.87    0.364    34.03
1959.87    0.365    37.15
1960.87    0.365    40.27
1961.87    0.366    43.37
1962.87    0.367    46.46
1963.87    0.368    49.53
1964.87    0.370    52.58
1965.87    0.372    55.59
1966.87    0.375    58.57
1967.87    0.377    61.51
1968.87    0.380    64.41
1969.87    0.384    67.25
1970.87    0.388    70.04
1971.87    0.392    72.78
1972.87    0.396    75.45
1973.87    0.401    78.06
1974.87    0.406    80.61
1975.87    0.411    83.10
1976.87    0.417    85.52
1977.87    0.423    87.87
1978.87    0.429    90.16
1979.87    0.435    92.39
1980.87    0.442    94.55
1981.87    0.448    96.64
1982.87    0.455    98.68
1983.87    0.462   100.66
1984.87    0.469   102.58
1985.87    0.476   104.44
1986.87    0.483   106.24
1987.87    0.490   108.00
1988.87    0.497   109.70
1989.87    0.504   111.36
1990.87    0.511   112.97
1991.87    0.518   114.54
1992.87    0.526   116.06
1993.87    0.533   117.55
1994.87    0.540   118.99
1995.87    0.546   120.40
1996.87    0.553   121.77
1997.87    0.560   123.11
1998.87    0.567   124.42
1999.87    0.573   125.70
2000.87    0.579   126.95
2001.87    0.586   128.17
2002.87    0.592   129.37
2003.87    0.598   130.55
2004.87    0.603   131.70
2005.87    0.609   132.83
2006.87    0.614   133.94
2007.87    0.620   135.03
2008.87    0.625   136.10
2009.87    0.630   137.15
2010.87    0.634   138.19
2011.87    0.639   139.22
2012.87    0.643   140.23
2013.87    0.647   141.23
2014.87    0.651   142.21
2015.87    0.655   143.18
2016.87    0.658   144.15
2017.87    0.661   145.10
2018.87    0.664   146.05
2019.87    0.667   146.98
2020.87    0.669   147.91
2021.87    0.672   148.84
2022.87    0.673   149.76
2023.87    0.675   150.67
2024.87    0.677   151.58
2025.87    0.678   152.48
2026.87    0.679   153.39
2027.87    0.679   154.29
2028.87    0.679   155.19
2029.87    0.679   156.09
2030.87    0.679   156.99
2031.87    0.679   157.89
2032.87    0.678   158.79
2033.87    0.677   159.69
2034.87    0.675   160.60
2035.87    0.673   161.52
2036.87    0.671   162.44
2037.87    0.669   163.36
2038.87    0.666   164.29
2039.87    0.663   165.23
2040.87    0.660   166.18
2041.87    0.656   167.14
2042.87    0.652   168.11
2043.87    0.648   169.09
2044.87    0.643   170.09
2045.87    0.638   171.10
2046.87    0.633   172.13
2047.87    0.627   173.17
2048.86    0.621   174.24
2049.86    0.615   175.32
2050.86    0.608   176.43
2051.86    0.601   177.57
2052.86    0.594   178.73
2053.86    0.586   179.93
2054.86    0.578   181.15
2055.86    0.569   182.41
2056.86    0.561   183.72
2057.86    0.551   185.06
2058.86    0.542   186.45
2059.86    0.532   187.89
2060.86    0.522   189.38
2061.86    0.512   190.93
2062.86    0.501   192.55
2063.86    0.490   194.24
2064.86    0.479   196.01
2065.86    0.467   197.87
2066.86    0.456   199.82
2067.86    0.444   201.87
2068.86    0.432   204.04
2069.86    0.419   206.34
2070.86    0.407   208.77
2071.86    0.395   211.35
2072.86    0.382   214.10
2073.86    0.370   217.04
2074.86    0.358   220.17
2075.86    0.346   223.51
2076.86    0.335   227.09
2077.86    0.324   230.91
2078.86    0.314   234.99
2079.86    0.305   239.33
2080.86    0.296   243.94
2081.86    0.288   248.81
2082.86    0.282   253.91
2083.86    0.277   259.23
2084.86    0.273   264.73
2085.86    0.271   270.34
2086.86    0.270   276.02
2087.86    0.271   281.70
2088.86    0.273   287.33
2089.86    0.276   292.85
2090.86    0.280   298.23
2091.86    0.285   303.42
2092.86    0.291   308.42
2093.86    0.298   313.22
2094.86    0.304   317.80
2095.86    0.311   322.19
2096.86    0.318   326.40
2097.86    0.324   330.43
2098.86    0.330   334.31
2099.86    0.336   338.05
2100.86    0.341   341.68
2101.86    0.346   345.20
2102.86    0.350   348.63
2103.86    0.353   351.99

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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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 15:05:10