Double Star Calculator - Orbit

Orbital Elements for I669AB

WDS:	I669AB	WDS ID/Discoverer
P:	113.600	Orbital period (years)
a:	0.684	Semi-major axis (arcseconds)
i:	93.66	Inclination (degrees)
Ω:	63.02	Longitude of ascending node (degrees)
T:	2010.620	Epoch of periastron passage (year)
e:	0.613	Eccentricity
ω:	207.6	Longitude of periastron (degrees)
Start-Year:	1968.2	Year
End-Year:	2081.8	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I669AB
Position:	205940.24-521028.7	Epoch-2000 right ascension and declination
WDS-ID:	20597-5211	WDS designation
Discoverer Code:	I669AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	199489	HD catalog number
Hipparcos number:	103620	Hipparcos catalog number
V1:	9.01	Magnitude of the primary
V2:	9.51	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		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:	Mdz2017	Reference

Double Star Orbit for I669AB

WDS 6th Orbit including measures of I669AB

-- 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 I669AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.572    65.00
--------------------------
1968.20    0.784    59.74
1969.20    0.766    59.62
1970.20    0.746    59.49
1971.20    0.726    59.35
1972.20    0.706    59.20
1973.20    0.685    59.05
1974.20    0.663    58.88
1975.20    0.640    58.71
1976.20    0.617    58.52
1977.20    0.593    58.32
1978.20    0.569    58.09
1979.20    0.544    57.85
1980.20    0.518    57.59
1981.20    0.492    57.29
1982.20    0.465    56.97
1983.20    0.437    56.60
1984.20    0.409    56.18
1985.20    0.380    55.70
1986.20    0.351    55.14
1987.20    0.321    54.47
1988.20    0.290    53.67
1989.20    0.259    52.67
1990.20    0.228    51.41
1991.20    0.196    49.74
1992.20    0.164    47.41
1993.20    0.132    43.95
1994.20    0.100    38.29
1995.20    0.070    27.57
1996.20    0.045     3.29
1997.20    0.039   316.06
1998.20    0.058   281.04
1999.20    0.086   265.95
2000.20    0.117   258.57
2001.20    0.148   254.28
2002.20    0.179   251.46
2003.20    0.207   249.45
2004.20    0.234   247.91
2005.20    0.256   246.66
2006.20    0.273   245.60
2007.20    0.283   244.63
2008.20    0.283   243.70
2009.20    0.272   242.74
2010.20    0.249   241.65
2011.20    0.212   240.24
2012.20    0.165   238.12
2013.20    0.110   234.03
2014.20    0.053   221.23
2015.20    0.025   123.81
2016.20    0.077    80.36
2017.20    0.135    73.13
2018.20    0.192    70.24
2019.20    0.247    68.66
2020.20    0.299    67.65
2021.20    0.349    66.94
2022.20    0.396    66.39
2023.20    0.441    65.97
2024.20    0.483    65.62
2025.20    0.523    65.32
2026.20    0.561    65.06
2027.20    0.597    64.84
2028.20    0.631    64.64
2029.20    0.663    64.46
2030.20    0.693    64.30
2031.20    0.722    64.15
2032.20    0.749    64.01
2033.20    0.774    63.89
2034.20    0.798    63.76
2035.20    0.820    63.65
2036.20    0.841    63.54
2037.20    0.861    63.44
2038.20    0.880    63.34
2039.20    0.897    63.25
2040.20    0.913    63.15
2041.20    0.927    63.07
2042.20    0.941    62.98
2043.20    0.954    62.90
2044.20    0.965    62.82
2045.20    0.975    62.74
2046.20    0.985    62.66
2047.20    0.993    62.58
2048.20    1.001    62.51
2049.20    1.007    62.43
2050.20    1.013    62.36
2051.20    1.017    62.29
2052.20    1.021    62.21
2053.20    1.024    62.14
2054.20    1.026    62.07
2055.20    1.027    62.00
2056.20    1.028    61.93
2057.20    1.027    61.86
2058.20    1.026    61.79
2059.20    1.024    61.72
2060.20    1.021    61.65
2061.20    1.017    61.57
2062.20    1.013    61.50
2063.20    1.008    61.43
2064.20    1.002    61.35
2065.20    0.995    61.28
2066.20    0.988    61.20
2067.20    0.980    61.13
2068.20    0.971    61.05
2069.20    0.962    60.97
2070.20    0.952    60.89
2071.20    0.941    60.80
2072.20    0.929    60.72
2073.20    0.917    60.63
2074.20    0.904    60.54
2075.20    0.891    60.45
2076.20    0.876    60.35
2077.20    0.862    60.25
2078.20    0.846    60.15
2079.20    0.830    60.04
2080.20    0.813    59.93
2081.20    0.795    59.82

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 18:21:09