Double Star Calculator - Orbit

Orbital Elements for A2494

WDS:	A2494	WDS ID/Discoverer
P:	142.000	Orbital period (years)
a:	0.29	Semi-major axis (arcseconds)
i:	68.7	Inclination (degrees)
Ω:	212.1	Longitude of ascending node (degrees)
T:	2029.900	Epoch of periastron passage (year)
e:	0.94	Eccentricity
ω:	291.1	Longitude of periastron (degrees)
Start-Year:	1954.0	Year
End-Year:	2096.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2494
Position:	221054.88+421048.6	Epoch-2000 right ascension and declination
WDS-ID:	22109+4211	WDS designation
Discoverer Code:	A2494	Discover designation and components
ADS number:	15701	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.9	Magnitude of the primary
V2:	9.9	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	FMR2018c	Reference

Double Star Orbit for A2494

WDS 6th Orbit including measures of A2494

-- 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 A2494

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.103    21.48
--------------------------
1954.00    0.271   347.11
1955.00    0.272   347.47
1956.00    0.274   347.82
1957.00    0.276   348.17
1958.00    0.277   348.52
1959.00    0.278   348.86
1960.00    0.280   349.20
1961.00    0.281   349.54
1962.00    0.282   349.87
1963.00    0.283   350.20
1964.00    0.284   350.53
1965.00    0.285   350.86
1966.00    0.286   351.18
1967.00    0.287   351.51
1968.00    0.288   351.83
1969.00    0.288   352.14
1970.00    0.289   352.46
1971.00    0.289   352.78
1972.00    0.290   353.09
1973.00    0.290   353.41
1974.00    0.291   353.72
1975.00    0.291   354.03
1976.00    0.291   354.35
1977.00    0.291   354.66
1978.00    0.291   354.97
1979.00    0.291   355.28
1980.00    0.291   355.60
1981.00    0.291   355.91
1982.00    0.290   356.22
1983.00    0.290   356.54
1984.00    0.289   356.85
1985.00    0.289   357.17
1986.00    0.288   357.49
1987.00    0.287   357.80
1988.00    0.286   358.13
1989.00    0.285   358.45
1990.00    0.284   358.78
1991.00    0.283   359.10
1992.00    0.282   359.44
1993.00    0.280   359.77
1994.00    0.279     0.11
1995.00    0.277     0.45
1996.00    0.275     0.80
1997.00    0.273     1.15
1998.00    0.271     1.50
1999.00    0.269     1.87
2000.00    0.267     2.23
2001.00    0.265     2.61
2002.00    0.262     2.99
2003.00    0.259     3.38
2004.00    0.256     3.78
2005.00    0.253     4.18
2006.00    0.250     4.60
2007.00    0.246     5.03
2008.00    0.243     5.47
2009.00    0.239     5.93
2010.00    0.235     6.40
2011.00    0.230     6.89
2012.00    0.226     7.40
2013.00    0.221     7.93
2014.00    0.216     8.48
2015.00    0.210     9.06
2016.00    0.204     9.68
2017.00    0.198    10.33
2018.00    0.191    11.03
2019.00    0.184    11.78
2020.00    0.176    12.60
2021.00    0.168    13.49
2022.00    0.159    14.48
2023.00    0.149    15.60
2024.00    0.138    16.89
2025.00    0.125    18.42
2026.00    0.111    20.32
2027.00    0.094    22.85
2028.00    0.073    26.67
2029.00    0.043    34.76
2030.00    0.014   191.80
2031.00    0.040   229.95
2032.00    0.048   243.53
2033.00    0.054   253.63
2034.00    0.059   261.94
2035.00    0.063   269.02
2036.00    0.068   275.15
2037.00    0.072   280.51
2038.00    0.077   285.25
2039.00    0.082   289.45
2040.00    0.086   293.20
2041.00    0.091   296.57
2042.00    0.096   299.61
2043.00    0.100   302.38
2044.00    0.105   304.89
2045.00    0.109   307.20
2046.00    0.114   309.32
2047.00    0.118   311.28
2048.00    0.123   313.10
2049.00    0.127   314.78
2050.00    0.132   316.36
2051.00    0.136   317.83
2052.00    0.140   319.22
2053.00    0.145   320.52
2054.00    0.149   321.75
2055.00    0.153   322.91
2056.00    0.157   324.01
2057.00    0.161   325.05
2058.00    0.165   326.05
2059.00    0.169   327.00
2060.00    0.173   327.91
2061.00    0.176   328.77
2062.00    0.180   329.60
2063.00    0.184   330.40
2064.00    0.187   331.17
2065.00    0.191   331.91
2066.00    0.194   332.62
2067.00    0.198   333.31
2068.00    0.201   333.97
2069.00    0.204   334.61
2070.00    0.208   335.24
2071.00    0.211   335.84
2072.00    0.214   336.43
2073.00    0.217   337.00
2074.00    0.220   337.55
2075.00    0.223   338.09
2076.00    0.226   338.61
2077.00    0.229   339.12
2078.00    0.231   339.62
2079.00    0.234   340.11
2080.00    0.237   340.59
2081.00    0.239   341.05
2082.00    0.242   341.51
2083.00    0.244   341.96
2084.00    0.247   342.39
2085.00    0.249   342.82
2086.00    0.251   343.25
2087.00    0.254   343.66
2088.00    0.256   344.07
2089.00    0.258   344.47
2090.00    0.260   344.86
2091.00    0.262   345.25
2092.00    0.264   345.63
2093.00    0.266   346.01
2094.00    0.267   346.38
2095.00    0.269   346.75

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 18:37:22