Double Star Calculator - Orbit

Orbital Elements for A2288

WDS:	A2288	WDS ID/Discoverer
P:	122.720	Orbital period (years)
a:	0.3	Semi-major axis (arcseconds)
i:	139.4	Inclination (degrees)
Ω:	135.4	Longitude of ascending node (degrees)
T:	1950.410	Epoch of periastron passage (year)
e:	0.659	Eccentricity
ω:	86.1	Longitude of periastron (degrees)
Start-Year:	1963.64	Year
End-Year:	2086.36	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2288
Position:	212419.75+034300.8	Epoch-2000 right ascension and declination
WDS-ID:	21243+0343	WDS designation
Discoverer Code:	A2288	Discover designation and components
ADS number:	14942	Aitken Double Star catalog
HD number:	203789	HD catalog number
Hipparcos number:	105682	Hipparcos catalog number
V1:	9.97	Magnitude of the primary
V2:	10.27	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 A2288

WDS 6th Orbit including measures of A2288

-- 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 A2288

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.365   214.59
--------------------------
1963.64    0.240   295.69
1964.64    0.249   293.17
1965.64    0.257   290.81
1966.64    0.265   288.60
1967.64    0.272   286.50
1968.64    0.278   284.51
1969.64    0.285   282.61
1970.64    0.291   280.79
1971.64    0.297   279.04
1972.64    0.302   277.36
1973.64    0.307   275.73
1974.64    0.312   274.16
1975.64    0.317   272.63
1976.64    0.321   271.15
1977.64    0.325   269.70
1978.64    0.329   268.29
1979.64    0.333   266.91
1980.64    0.336   265.57
1981.64    0.340   264.25
1982.64    0.343   262.95
1983.64    0.346   261.68
1984.64    0.349   260.43
1985.64    0.351   259.20
1986.64    0.354   257.98
1987.64    0.356   256.79
1988.64    0.358   255.60
1989.64    0.360   254.44
1990.64    0.362   253.28
1991.64    0.364   252.14
1992.64    0.366   251.01
1993.64    0.368   249.89
1994.64    0.369   248.78
1995.64    0.371   247.68
1996.64    0.372   246.58
1997.64    0.373   245.50
1998.64    0.374   244.41
1999.64    0.375   243.34
2000.64    0.376   242.27
2001.64    0.376   241.20
2002.64    0.377   240.14
2003.64    0.378   239.08
2004.64    0.378   238.03
2005.64    0.378   236.97
2006.64    0.379   235.92
2007.64    0.379   234.87
2008.64    0.379   233.82
2009.64    0.379   232.77
2010.64    0.379   231.72
2011.64    0.379   230.67
2012.64    0.378   229.61
2013.64    0.378   228.56
2014.64    0.377   227.50
2015.64    0.377   226.44
2016.64    0.376   225.38
2017.64    0.375   224.31
2018.64    0.375   223.24
2019.64    0.374   222.16
2020.64    0.373   221.08
2021.64    0.372   219.99
2022.64    0.370   218.90
2023.64    0.369   217.79
2024.64    0.368   216.68
2025.64    0.366   215.56
2026.64    0.365   214.43
2027.64    0.363   213.30
2028.64    0.361   212.15
2029.64    0.359   210.99
2030.64    0.358   209.81
2031.64    0.355   208.63
2032.64    0.353   207.43
2033.64    0.351   206.21
2034.64    0.349   204.98
2035.64    0.346   203.73
2036.64    0.344   202.46
2037.64    0.341   201.17
2038.64    0.338   199.87
2039.64    0.335   198.53
2040.64    0.332   197.18
2041.64    0.329   195.80
2042.64    0.325   194.39
2043.64    0.322   192.94
2044.64    0.318   191.47
2045.64    0.314   189.96
2046.64    0.310   188.42
2047.64    0.306   186.83
2048.64    0.302   185.19
2049.64    0.297   183.51
2050.64    0.292   181.77
2051.64    0.287   179.97
2052.64    0.282   178.11
2053.64    0.276   176.17
2054.64    0.270   174.15
2055.64    0.264   172.04
2056.64    0.258   169.83
2057.64    0.251   167.50
2058.64    0.244   165.03
2059.64    0.236   162.40
2060.64    0.228   159.60
2061.64    0.219   156.57
2062.64    0.209   153.28
2063.64    0.199   149.66
2064.64    0.188   145.64
2065.64    0.176   141.10
2066.64    0.164   135.88
2067.64    0.150   129.73
2068.64    0.135   122.27
2069.64    0.119   112.88
2070.64    0.103   100.60
2071.64    0.089    84.10
2072.64    0.080    62.52
2073.64    0.078    37.86
2074.64    0.086    15.17
2075.64    0.100   357.51
2076.64    0.116   344.45
2077.64    0.132   334.62
2078.64    0.148   326.95
2079.64    0.163   320.74
2080.64    0.177   315.54
2081.64    0.190   311.07
2082.64    0.202   307.16
2083.64    0.213   303.67
2084.64    0.224   300.51
2085.64    0.234   297.63

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 18:26:05