Double Star Calculator - Orbit

Orbital Elements for A2308

WDS:	A2308	WDS ID/Discoverer
P:	141.800	Orbital period (years)
a:	0.367	Semi-major axis (arcseconds)
i:	62.9	Inclination (degrees)
Ω:	306.6	Longitude of ascending node (degrees)
T:	1958.950	Epoch of periastron passage (year)
e:	0.124	Eccentricity
ω:	10.5	Longitude of periastron (degrees)
Start-Year:	1954.1	Year
End-Year:	2095.9	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2308
Position:	010245.24+021341.6	Epoch-2000 right ascension and declination
WDS-ID:	01028+0214	WDS designation
Discoverer Code:	A2308	Discover designation and components
ADS number:	864	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	4886	Hipparcos catalog number
V1:	9.87	Magnitude of the primary
V2:	11.73	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	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:	Tok2015c	Reference

Double Star Orbit for A2308

WDS 6th Orbit including measures of A2308

-- 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 A2308

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.411   128.34
--------------------------
1954.10    0.322   304.14
1955.10    0.322   305.64
1956.10    0.322   307.13
1957.10    0.321   308.62
1958.10    0.319   310.13
1959.10    0.317   311.66
1960.10    0.314   313.21
1961.10    0.310   314.80
1962.10    0.306   316.43
1963.10    0.300   318.12
1964.10    0.295   319.86
1965.10    0.289   321.68
1966.10    0.282   323.58
1967.10    0.275   325.58
1968.10    0.267   327.68
1969.10    0.259   329.92
1970.10    0.251   332.30
1971.10    0.242   334.85
1972.10    0.233   337.59
1973.10    0.225   340.54
1974.10    0.216   343.73
1975.10    0.207   347.18
1976.10    0.199   350.92
1977.10    0.191   354.98
1978.10    0.184   359.37
1979.10    0.178     4.10
1980.10    0.172     9.17
1981.10    0.167    14.55
1982.10    0.164    20.20
1983.10    0.162    26.05
1984.10    0.161    32.02
1985.10    0.161    37.99
1986.10    0.163    43.88
1987.10    0.166    49.58
1988.10    0.171    55.02
1989.10    0.176    60.16
1990.10    0.183    64.95
1991.10    0.190    69.39
1992.10    0.198    73.49
1993.10    0.207    77.26
1994.10    0.216    80.72
1995.10    0.225    83.90
1996.10    0.235    86.82
1997.10    0.244    89.51
1998.10    0.254    92.00
1999.10    0.264    94.30
2000.10    0.274    96.44
2001.10    0.283    98.44
2002.10    0.293   100.31
2003.10    0.302   102.06
2004.10    0.311   103.71
2005.10    0.319   105.26
2006.10    0.328   106.74
2007.10    0.336   108.14
2008.10    0.344   109.48
2009.10    0.351   110.76
2010.10    0.358   111.99
2011.10    0.365   113.18
2012.10    0.371   114.32
2013.10    0.377   115.43
2014.10    0.382   116.50
2015.10    0.387   117.55
2016.10    0.392   118.57
2017.10    0.396   119.56
2018.10    0.399   120.54
2019.10    0.402   121.50
2020.10    0.405   122.45
2021.10    0.407   123.39
2022.10    0.409   124.31
2023.10    0.410   125.23
2024.10    0.411   126.15
2025.10    0.412   127.06
2026.10    0.412   127.98
2027.10    0.411   128.89
2028.10    0.410   129.81
2029.10    0.408   130.73
2030.10    0.407   131.66
2031.10    0.404   132.60
2032.10    0.401   133.55
2033.10    0.398   134.52
2034.10    0.394   135.51
2035.10    0.390   136.51
2036.10    0.385   137.54
2037.10    0.380   138.59
2038.10    0.375   139.68
2039.10    0.369   140.79
2040.10    0.363   141.94
2041.10    0.357   143.14
2042.10    0.350   144.38
2043.10    0.343   145.67
2044.10    0.335   147.01
2045.10    0.327   148.42
2046.10    0.319   149.90
2047.10    0.311   151.46
2048.10    0.302   153.11
2049.10    0.293   154.85
2050.10    0.285   156.70
2051.10    0.276   158.67
2052.10    0.266   160.78
2053.10    0.257   163.03
2054.10    0.248   165.45
2055.10    0.239   168.05
2056.10    0.230   170.86
2057.10    0.222   173.89
2058.10    0.213   177.16
2059.10    0.205   180.70
2060.10    0.198   184.51
2061.10    0.191   188.60
2062.10    0.185   192.99
2063.10    0.179   197.66
2064.10    0.175   202.60
2065.10    0.172   207.75
2066.10    0.169   213.08
2067.10    0.168   218.52
2068.10    0.168   223.99
2069.10    0.170   229.41
2070.10    0.172   234.71
2071.10    0.176   239.83
2072.10    0.180   244.73
2073.10    0.186   249.36
2074.10    0.192   253.71
2075.10    0.198   257.77
2076.10    0.206   261.57
2077.10    0.213   265.09
2078.10    0.221   268.37
2079.10    0.229   271.42
2080.10    0.237   274.26
2081.10    0.245   276.92
2082.10    0.253   279.41
2083.10    0.261   281.74
2084.10    0.269   283.95
2085.10    0.276   286.03
2086.10    0.283   288.01
2087.10    0.289   289.90
2088.10    0.295   291.71
2089.10    0.301   293.45
2090.10    0.306   295.13
2091.10    0.310   296.76
2092.10    0.314   298.35
2093.10    0.317   299.91
2094.10    0.319   301.44
2095.10    0.321   302.95

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 14:46:37