Double Star Calculator - Orbit

Orbital Elements for A2984

WDS:	A2984	WDS ID/Discoverer
P:	160.100	Orbital period (years)
a:	0.648	Semi-major axis (arcseconds)
i:	36.7	Inclination (degrees)
Ω:	172.1	Longitude of ascending node (degrees)
T:	1893.200	Epoch of periastron passage (year)
e:	0.567	Eccentricity
ω:	356.0	Longitude of periastron (degrees)
Start-Year:	1944.95	Year
End-Year:	2105.05	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2984
Position:	171636.69-002643.1	Epoch-2000 right ascension and declination
WDS-ID:	17166-0027	WDS designation
Discoverer Code:	A2984	Discover designation and components
ADS number:	10429	Aitken Double Star catalog
HD number:	156266	HD catalog number
Hipparcos number:	84514	Hipparcos catalog number
V1:	4.92	Magnitude of the primary
V2:	7.51	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2024	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:	Tok2024e	Reference

Double Star Orbit for A2984

WDS 6th Orbit including measures of A2984

-- 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 A2984

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.593    35.04
--------------------------
1944.95    0.887   330.07
1945.95    0.896   330.86
1946.95    0.904   331.63
1947.95    0.912   332.38
1948.95    0.920   333.13
1949.95    0.927   333.86
1950.95    0.934   334.58
1951.95    0.941   335.29
1952.95    0.947   335.99
1953.95    0.954   336.68
1954.95    0.959   337.36
1955.95    0.965   338.03
1956.95    0.970   338.70
1957.95    0.975   339.36
1958.95    0.980   340.01
1959.95    0.984   340.66
1960.95    0.988   341.30
1961.95    0.992   341.93
1962.95    0.996   342.56
1963.95    0.999   343.19
1964.95    1.002   343.82
1965.95    1.004   344.43
1966.95    1.007   345.05
1967.95    1.009   345.67
1968.95    1.010   346.28
1969.95    1.012   346.89
1970.95    1.013   347.50
1971.95    1.014   348.10
1972.95    1.014   348.71
1973.95    1.015   349.32
1974.95    1.015   349.92
1975.95    1.014   350.53
1976.95    1.014   351.13
1977.95    1.013   351.74
1978.95    1.012   352.35
1979.95    1.010   352.96
1980.95    1.008   353.57
1981.95    1.006   354.19
1982.95    1.004   354.80
1983.95    1.001   355.42
1984.95    0.998   356.05
1985.95    0.995   356.67
1986.95    0.991   357.31
1987.95    0.988   357.94
1988.95    0.983   358.59
1989.95    0.979   359.23
1990.95    0.974   359.89
1991.95    0.969     0.55
1992.95    0.964     1.22
1993.95    0.958     1.89
1994.95    0.952     2.58
1995.95    0.946     3.27
1996.95    0.939     3.97
1997.95    0.932     4.68
1998.95    0.925     5.41
1999.95    0.917     6.14
2000.95    0.909     6.89
2001.95    0.901     7.65
2002.95    0.892     8.43
2003.95    0.883     9.22
2004.95    0.874    10.03
2005.95    0.865    10.85
2006.95    0.855    11.70
2007.95    0.844    12.56
2008.95    0.834    13.45
2009.95    0.823    14.35
2010.95    0.812    15.29
2011.95    0.800    16.25
2012.95    0.788    17.24
2013.95    0.776    18.26
2014.95    0.763    19.31
2015.95    0.750    20.40
2016.95    0.737    21.52
2017.95    0.723    22.69
2018.95    0.709    23.91
2019.95    0.695    25.17
2020.95    0.680    26.49
2021.95    0.665    27.87
2022.95    0.650    29.31
2023.95    0.635    30.82
2024.95    0.619    32.41
2025.95    0.602    34.08
2026.95    0.586    35.85
2027.95    0.569    37.72
2028.95    0.552    39.71
2029.95    0.535    41.82
2030.95    0.517    44.07
2031.95    0.500    46.49
2032.95    0.482    49.08
2033.95    0.464    51.86
2034.95    0.446    54.87
2035.95    0.429    58.13
2036.95    0.411    61.66
2037.95    0.394    65.51
2038.95    0.378    69.69
2039.95    0.362    74.25
2040.95    0.347    79.22
2041.95    0.333    84.62
2042.95    0.320    90.48
2043.95    0.309    96.80
2044.95    0.299   103.55
2045.95    0.291   110.72
2046.95    0.285   118.23
2047.95    0.281   126.00
2048.95    0.279   133.96
2049.95    0.278   142.00
2050.95    0.278   150.07
2051.95    0.279   158.12
2052.95    0.280   166.11
2053.95    0.281   174.03
2054.95    0.282   181.89
2055.95    0.284   189.67
2056.95    0.286   197.37
2057.95    0.288   204.96
2058.95    0.291   212.40
2059.95    0.296   219.64
2060.95    0.302   226.64
2061.95    0.309   233.34
2062.95    0.318   239.70
2063.95    0.328   245.70
2064.95    0.339   251.31
2065.95    0.352   256.55
2066.95    0.365   261.41
2067.95    0.379   265.92
2068.95    0.394   270.09
2069.95    0.410   273.95
2070.95    0.425   277.53
2071.95    0.442   280.85
2072.95    0.458   283.93
2073.95    0.475   286.80
2074.95    0.491   289.48
2075.95    0.508   291.98
2076.95    0.524   294.32
2077.95    0.540   296.52
2078.95    0.557   298.60
2079.95    0.573   300.55
2080.95    0.589   302.40
2081.95    0.604   304.15
2082.95    0.620   305.82
2083.95    0.635   307.40
2084.95    0.650   308.91
2085.95    0.665   310.35
2086.95    0.679   311.74
2087.95    0.693   313.06
2088.95    0.707   314.33
2089.95    0.720   315.56
2090.95    0.734   316.74
2091.95    0.747   317.88
2092.95    0.759   318.98
2093.95    0.772   320.04
2094.95    0.784   321.07
2095.95    0.795   322.07
2096.95    0.807   323.04
2097.95    0.818   323.99
2098.95    0.828   324.91
2099.95    0.839   325.81
2100.95    0.849   326.68
2101.95    0.859   327.54
2102.95    0.868   328.37
2103.95    0.878   329.19
2104.95    0.886   329.99

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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 17:35:54