Double Star Calculator - Orbit

Orbital Elements for I22AB

WDS:	I22AB	WDS ID/Discoverer
P:	151.900	Orbital period (years)
a:	0.805	Semi-major axis (arcseconds)
i:	86.8	Inclination (degrees)
Ω:	174.8	Longitude of ascending node (degrees)
T:	2001.600	Epoch of periastron passage (year)
e:	0.734	Eccentricity
ω:	263.8	Longitude of periastron (degrees)
Start-Year:	1949.05	Year
End-Year:	2100.95	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I22AB
Position:	225516.15-482756.6	Epoch-2000 right ascension and declination
WDS-ID:	22553-4828	WDS designation
Discoverer Code:	I22AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	216655	HD catalog number
Hipparcos number:	113191	Hipparcos catalog number
V1:	7.29	Magnitude of the primary
V2:	8.91	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	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:	Tok2022g	Reference

Double Star Orbit for I22AB

WDS 6th Orbit including measures of I22AB

-- 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 I22AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.615   178.30
--------------------------
1949.05    0.173   330.10
1950.05    0.184   331.93
1951.05    0.196   333.54
1952.05    0.208   334.98
1953.05    0.219   336.25
1954.05    0.231   337.40
1955.05    0.243   338.44
1956.05    0.254   339.39
1957.05    0.266   340.25
1958.05    0.277   341.04
1959.05    0.289   341.76
1960.05    0.300   342.43
1961.05    0.311   343.06
1962.05    0.323   343.64
1963.05    0.333   344.18
1964.05    0.344   344.69
1965.05    0.355   345.16
1966.05    0.365   345.61
1967.05    0.375   346.04
1968.05    0.385   346.44
1969.05    0.395   346.82
1970.05    0.404   347.19
1971.05    0.413   347.54
1972.05    0.422   347.87
1973.05    0.430   348.19
1974.05    0.438   348.50
1975.05    0.446   348.80
1976.05    0.453   349.09
1977.05    0.460   349.37
1978.05    0.466   349.64
1979.05    0.471   349.90
1980.05    0.476   350.16
1981.05    0.480   350.42
1982.05    0.483   350.67
1983.05    0.486   350.92
1984.05    0.487   351.16
1985.05    0.487   351.41
1986.05    0.487   351.65
1987.05    0.484   351.90
1988.05    0.481   352.15
1989.05    0.475   352.40
1990.05    0.468   352.67
1991.05    0.458   352.94
1992.05    0.445   353.22
1993.05    0.429   353.53
1994.05    0.410   353.86
1995.05    0.385   354.23
1996.05    0.355   354.65
1997.05    0.318   355.17
1998.05    0.272   355.84
1999.05    0.215   356.83
2000.05    0.148   358.64
2001.05    0.070     4.20
2002.05    0.019   136.14
2003.05    0.099   168.09
2004.05    0.174   171.45
2005.05    0.240   172.83
2006.05    0.297   173.64
2007.05    0.346   174.20
2008.05    0.387   174.64
2009.05    0.423   174.99
2010.05    0.453   175.30
2011.05    0.479   175.56
2012.05    0.502   175.80
2013.05    0.522   176.03
2014.05    0.539   176.23
2015.05    0.553   176.43
2016.05    0.566   176.61
2017.05    0.577   176.79
2018.05    0.586   176.97
2019.05    0.593   177.13
2020.05    0.600   177.30
2021.05    0.605   177.46
2022.05    0.609   177.61
2023.05    0.612   177.77
2024.05    0.614   177.93
2025.05    0.615   178.08
2026.05    0.615   178.23
2027.05    0.615   178.39
2028.05    0.614   178.54
2029.05    0.612   178.70
2030.05    0.610   178.85
2031.05    0.607   179.01
2032.05    0.603   179.17
2033.05    0.600   179.33
2034.05    0.595   179.49
2035.05    0.590   179.66
2036.05    0.585   179.83
2037.05    0.579   180.00
2038.05    0.573   180.18
2039.05    0.567   180.35
2040.05    0.560   180.54
2041.05    0.553   180.73
2042.05    0.546   180.92
2043.05    0.538   181.12
2044.05    0.530   181.32
2045.05    0.522   181.53
2046.05    0.513   181.75
2047.05    0.504   181.97
2048.05    0.495   182.21
2049.05    0.486   182.45
2050.05    0.477   182.70
2051.05    0.467   182.96
2052.05    0.457   183.23
2053.05    0.447   183.52
2054.05    0.437   183.82
2055.05    0.427   184.13
2056.05    0.416   184.46
2057.05    0.406   184.80
2058.05    0.395   185.16
2059.05    0.384   185.55
2060.05    0.373   185.95
2061.05    0.362   186.38
2062.05    0.351   186.84
2063.05    0.339   187.33
2064.05    0.328   187.86
2065.05    0.316   188.42
2066.05    0.305   189.02
2067.05    0.293   189.67
2068.05    0.281   190.38
2069.05    0.270   191.14
2070.05    0.258   191.98
2071.05    0.246   192.90
2072.05    0.234   193.91
2073.05    0.222   195.03
2074.05    0.210   196.28
2075.05    0.199   197.67
2076.05    0.187   199.24
2077.05    0.175   201.02
2078.05    0.164   203.05
2079.05    0.152   205.38
2080.05    0.141   208.08
2081.05    0.131   211.23
2082.05    0.120   214.94
2083.05    0.111   219.32
2084.05    0.102   224.52
2085.05    0.093   230.67
2086.05    0.087   237.89
2087.05    0.081   246.18
2088.05    0.078   255.41
2089.05    0.077   265.21
2090.05    0.078   275.03
2091.05    0.081   284.34
2092.05    0.086   292.75
2093.05    0.093   300.09
2094.05    0.101   306.36
2095.05    0.109   311.65
2096.05    0.119   316.12
2097.05    0.129   319.89
2098.05    0.140   323.11
2099.05    0.151   325.86
2100.05    0.162   328.23

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 18:45:17