Double Star Calculator - Orbit

Orbital Elements for A2570

WDS:	A2570	WDS ID/Discoverer
P:	174.000	Orbital period (years)
a:	0.245	Semi-major axis (arcseconds)
i:	114.3	Inclination (degrees)
Ω:	122.9	Longitude of ascending node (degrees)
T:	2023.500	Epoch of periastron passage (year)
e:	0.83	Eccentricity
ω:	329.4	Longitude of periastron (degrees)
Start-Year:	1938.0	Year
End-Year:	2112.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2570
Position:	102558.68+025545.2	Epoch-2000 right ascension and declination
WDS-ID:	10260+0256	WDS designation
Discoverer Code:	A2570	Discover designation and components
ADS number:	7769	Aitken Double Star catalog
HD number:	90361	HD catalog number
Hipparcos number:	51061	Hipparcos catalog number
V1:	7.79	Magnitude of the primary
V2:	7.71	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	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:	Tok2019c	Reference

Double Star Orbit for A2570

WDS 6th Orbit including measures of A2570

-- 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 A2570

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.048    95.18
--------------------------
1938.00    0.399   316.31
1939.00    0.400   316.13
1940.00    0.401   315.95
1941.00    0.401   315.77
1942.00    0.402   315.60
1943.00    0.403   315.42
1944.00    0.403   315.25
1945.00    0.404   315.07
1946.00    0.404   314.90
1947.00    0.404   314.72
1948.00    0.405   314.55
1949.00    0.405   314.37
1950.00    0.405   314.20
1951.00    0.405   314.02
1952.00    0.404   313.85
1953.00    0.404   313.68
1954.00    0.404   313.50
1955.00    0.403   313.33
1956.00    0.403   313.15
1957.00    0.402   312.98
1958.00    0.402   312.80
1959.00    0.401   312.62
1960.00    0.400   312.44
1961.00    0.399   312.27
1962.00    0.398   312.09
1963.00    0.397   311.91
1964.00    0.396   311.72
1965.00    0.394   311.54
1966.00    0.393   311.36
1967.00    0.391   311.17
1968.00    0.390   310.98
1969.00    0.388   310.80
1970.00    0.386   310.61
1971.00    0.384   310.41
1972.00    0.382   310.22
1973.00    0.380   310.02
1974.00    0.377   309.82
1975.00    0.375   309.62
1976.00    0.372   309.42
1977.00    0.370   309.21
1978.00    0.367   309.00
1979.00    0.364   308.79
1980.00    0.361   308.57
1981.00    0.357   308.35
1982.00    0.354   308.12
1983.00    0.351   307.89
1984.00    0.347   307.66
1985.00    0.343   307.42
1986.00    0.339   307.17
1987.00    0.335   306.92
1988.00    0.331   306.67
1989.00    0.327   306.40
1990.00    0.322   306.13
1991.00    0.317   305.85
1992.00    0.313   305.57
1993.00    0.307   305.27
1994.00    0.302   304.96
1995.00    0.297   304.65
1996.00    0.291   304.32
1997.00    0.285   303.97
1998.00    0.279   303.61
1999.00    0.273   303.24
2000.00    0.266   302.85
2001.00    0.259   302.43
2002.00    0.252   302.00
2003.00    0.245   301.53
2004.00    0.237   301.04
2005.00    0.229   300.52
2006.00    0.220   299.95
2007.00    0.212   299.34
2008.00    0.202   298.67
2009.00    0.193   297.94
2010.00    0.183   297.14
2011.00    0.172   296.23
2012.00    0.161   295.21
2013.00    0.150   294.03
2014.00    0.137   292.64
2015.00    0.124   290.98
2016.00    0.111   288.91
2017.00    0.096   286.22
2018.00    0.080   282.52
2019.00    0.064   276.93
2020.00    0.046   267.21
2021.00    0.030   246.07
2022.00    0.022   196.14
2023.00    0.031   149.19
2024.00    0.042   127.47
2025.00    0.048   113.58
2026.00    0.048   101.33
2027.00    0.047    88.90
2028.00    0.046    75.91
2029.00    0.047    62.72
2030.00    0.049    50.09
2031.00    0.052    38.70
2032.00    0.056    28.92
2033.00    0.062    20.74
2034.00    0.068    13.98
2035.00    0.075     8.38
2036.00    0.082     3.72
2037.00    0.089   359.79
2038.00    0.096   356.46
2039.00    0.103   353.59
2040.00    0.111   351.10
2041.00    0.118   348.92
2042.00    0.125   346.98
2043.00    0.132   345.26
2044.00    0.139   343.71
2045.00    0.146   342.31
2046.00    0.153   341.03
2047.00    0.160   339.87
2048.00    0.166   338.79
2049.00    0.173   337.80
2050.00    0.179   336.88
2051.00    0.186   336.03
2052.00    0.192   335.23
2053.00    0.198   334.48
2054.00    0.204   333.77
2055.00    0.210   333.10
2056.00    0.216   332.47
2057.00    0.221   331.88
2058.00    0.227   331.31
2059.00    0.232   330.77
2060.00    0.238   330.25
2061.00    0.243   329.76
2062.00    0.248   329.29
2063.00    0.253   328.84
2064.00    0.258   328.40
2065.00    0.263   327.98
2066.00    0.268   327.58
2067.00    0.273   327.19
2068.00    0.278   326.81
2069.00    0.282   326.45
2070.00    0.287   326.10
2071.00    0.291   325.75
2072.00    0.295   325.42
2073.00    0.299   325.10
2074.00    0.304   324.79
2075.00    0.308   324.48
2076.00    0.311   324.18
2077.00    0.315   323.89
2078.00    0.319   323.61
2079.00    0.323   323.33
2080.00    0.326   323.06
2081.00    0.330   322.80
2082.00    0.333   322.54
2083.00    0.337   322.28
2084.00    0.340   322.04
2085.00    0.343   321.79
2086.00    0.346   321.55
2087.00    0.349   321.32
2088.00    0.352   321.08
2089.00    0.355   320.86
2090.00    0.358   320.63
2091.00    0.360   320.41
2092.00    0.363   320.19
2093.00    0.366   319.98
2094.00    0.368   319.77
2095.00    0.370   319.56
2096.00    0.373   319.35
2097.00    0.375   319.15
2098.00    0.377   318.94
2099.00    0.379   318.75
2100.00    0.381   318.55
2101.00    0.383   318.35
2102.00    0.385   318.16
2103.00    0.387   317.97
2104.00    0.388   317.78
2105.00    0.390   317.59
2106.00    0.391   317.40
2107.00    0.393   317.22
2108.00    0.394   317.03
2109.00    0.395   316.85
2110.00    0.397   316.67
2111.00    0.398   316.49

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 16:27:40