Double Star Calculator - Orbit

Orbital Elements for I851

WDS:	I851	WDS ID/Discoverer
P:	117.000	Orbital period (years)
a:	0.216	Semi-major axis (arcseconds)
i:	136.0	Inclination (degrees)
Ω:	63.0	Longitude of ascending node (degrees)
T:	1953.900	Epoch of periastron passage (year)
e:	0.782	Eccentricity
ω:	11.0	Longitude of periastron (degrees)
Start-Year:	1966.5	Year
End-Year:	2083.5	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I851
Position:	101618.88-285842.5	Epoch-2000 right ascension and declination
WDS-ID:	10163-2859	WDS designation
Discoverer Code:	I851	Discover designation and components
ADS number:	7706	Aitken Double Star catalog
HD number:	89117	HD catalog number
Hipparcos number:	50309	Hipparcos catalog number
V1:	9.62	Magnitude of the primary
V2:	7.96	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	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:	Hrt2010a	Reference

Double Star Orbit for I851

WDS 6th Orbit including measures of I851

-- 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 I851

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.359   228.52
--------------------------
1966.50    0.182   267.17
1967.50    0.193   265.34
1968.50    0.204   263.71
1969.50    0.214   262.23
1970.50    0.223   260.88
1971.50    0.232   259.64
1972.50    0.241   258.49
1973.50    0.249   257.42
1974.50    0.257   256.41
1975.50    0.265   255.47
1976.50    0.272   254.58
1977.50    0.279   253.73
1978.50    0.286   252.92
1979.50    0.292   252.15
1980.50    0.299   251.42
1981.50    0.305   250.71
1982.50    0.310   250.03
1983.50    0.316   249.37
1984.50    0.321   248.74
1985.50    0.326   248.12
1986.50    0.330   247.52
1987.50    0.335   246.94
1988.50    0.339   246.37
1989.50    0.343   245.82
1990.50    0.347   245.28
1991.50    0.350   244.75
1992.50    0.354   244.23
1993.50    0.357   243.72
1994.50    0.360   243.22
1995.50    0.363   242.73
1996.50    0.365   242.24
1997.50    0.368   241.76
1998.50    0.370   241.29
1999.50    0.372   240.82
2000.50    0.374   240.36
2001.50    0.375   239.90
2002.50    0.377   239.44
2003.50    0.378   238.99
2004.50    0.379   238.54
2005.50    0.380   238.09
2006.50    0.381   237.65
2007.50    0.381   237.20
2008.50    0.382   236.76
2009.50    0.382   236.32
2010.50    0.382   235.88
2011.50    0.382   235.44
2012.50    0.381   235.00
2013.50    0.381   234.55
2014.50    0.380   234.11
2015.50    0.380   233.66
2016.50    0.379   233.22
2017.50    0.377   232.76
2018.50    0.376   232.31
2019.50    0.375   231.85
2020.50    0.373   231.39
2021.50    0.371   230.93
2022.50    0.369   230.46
2023.50    0.367   229.98
2024.50    0.364   229.50
2025.50    0.362   229.01
2026.50    0.359   228.52
2027.50    0.356   228.02
2028.50    0.353   227.50
2029.50    0.350   226.98
2030.50    0.346   226.45
2031.50    0.343   225.91
2032.50    0.339   225.36
2033.50    0.335   224.79
2034.50    0.331   224.21
2035.50    0.326   223.61
2036.50    0.322   223.00
2037.50    0.317   222.37
2038.50    0.312   221.72
2039.50    0.307   221.04
2040.50    0.301   220.35
2041.50    0.295   219.62
2042.50    0.290   218.87
2043.50    0.283   218.09
2044.50    0.277   217.27
2045.50    0.271   216.41
2046.50    0.264   215.51
2047.50    0.257   214.56
2048.50    0.249   213.55
2049.50    0.242   212.48
2050.50    0.234   211.35
2051.50    0.226   210.13
2052.50    0.217   208.81
2053.50    0.209   207.39
2054.50    0.200   205.85
2055.50    0.190   204.15
2056.50    0.181   202.28
2057.50    0.171   200.19
2058.50    0.160   197.83
2059.50    0.150   195.15
2060.50    0.139   192.05
2061.50    0.127   188.40
2062.50    0.116   184.04
2063.50    0.104   178.71
2064.50    0.092   172.02
2065.50    0.081   163.41
2066.50    0.070   152.06
2067.50    0.061   136.94
2068.50    0.054   117.25
2069.50    0.050    93.37
2070.50    0.048    66.57
2071.50    0.045    36.60
2072.50    0.045     3.95
2073.50    0.052   335.42
2074.50    0.063   315.47
2075.50    0.077   302.27
2076.50    0.092   293.21
2077.50    0.106   286.62
2078.50    0.120   281.60
2079.50    0.134   277.61
2080.50    0.147   274.34
2081.50    0.159   271.59
2082.50    0.171   269.23

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 16:25:55