Double Star Calculator - Orbit

Orbital Elements for HO303AB

WDS:	HO303AB	WDS ID/Discoverer
P:	124.903	Orbital period (years)
a:	4.33671	Semi-major axis (arcseconds)
i:	89.774	Inclination (degrees)
Ω:	3.564	Longitude of ascending node (degrees)
T:	1963.402	Epoch of periastron passage (year)
e:	0.99	Eccentricity
ω:	83.597	Longitude of periastron (degrees)
Start-Year:	1962.54825	Year
End-Year:	2087.45175	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HO303AB
Position:	234051.44+202157.2	Epoch-2000 right ascension and declination
WDS-ID:	23409+2022	WDS designation
Discoverer Code:	HO303AB	Discover designation and components
ADS number:	16923	Aitken Double Star catalog
HD number:	222474	HD catalog number
Hipparcos number:	116838	Hipparcos catalog number
V1:	8.50	Magnitude of the primary
V2:	10.81	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for HO303AB

WDS 6th Orbit including measures of HO303AB

-- 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 HO303AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.953   185.60
--------------------------
1962.55    0.266     2.91
1963.55    0.195   183.71
1964.55    0.486   183.97
1965.55    0.620   184.07
1966.55    0.715   184.14
1967.55    0.789   184.19
1968.55    0.850   184.24
1969.55    0.902   184.27
1970.55    0.947   184.31
1971.55    0.985   184.34
1972.55    1.020   184.37
1973.55    1.050   184.40
1974.55    1.077   184.43
1975.55    1.101   184.45
1976.55    1.123   184.48
1977.55    1.142   184.50
1978.55    1.159   184.52
1979.55    1.174   184.55
1980.55    1.188   184.57
1981.55    1.200   184.59
1982.55    1.211   184.61
1983.55    1.220   184.63
1984.55    1.228   184.65
1985.55    1.235   184.67
1986.55    1.241   184.69
1987.55    1.246   184.71
1988.55    1.249   184.73
1989.55    1.252   184.75
1990.55    1.254   184.77
1991.55    1.256   184.79
1992.55    1.256   184.80
1993.55    1.256   184.82
1994.55    1.255   184.84
1995.55    1.253   184.86
1996.55    1.250   184.88
1997.55    1.247   184.90
1998.55    1.244   184.92
1999.55    1.239   184.94
2000.55    1.235   184.96
2001.55    1.229   184.98
2002.55    1.223   185.00
2003.55    1.217   185.02
2004.55    1.210   185.04
2005.55    1.202   185.06
2006.55    1.195   185.08
2007.55    1.186   185.10
2008.55    1.177   185.12
2009.55    1.168   185.15
2010.55    1.158   185.17
2011.55    1.148   185.19
2012.55    1.138   185.21
2013.55    1.127   185.24
2014.55    1.116   185.26
2015.55    1.104   185.29
2016.55    1.092   185.31
2017.55    1.079   185.34
2018.55    1.067   185.36
2019.55    1.054   185.39
2020.55    1.040   185.42
2021.55    1.026   185.45
2022.55    1.012   185.47
2023.55    0.998   185.50
2024.55    0.983   185.54
2025.55    0.968   185.57
2026.55    0.952   185.60
2027.55    0.937   185.63
2028.55    0.921   185.67
2029.55    0.904   185.70
2030.55    0.888   185.74
2031.55    0.871   185.78
2032.55    0.854   185.82
2033.55    0.836   185.86
2034.55    0.818   185.91
2035.55    0.800   185.95
2036.55    0.782   186.00
2037.55    0.763   186.05
2038.55    0.745   186.11
2039.55    0.726   186.16
2040.55    0.706   186.22
2041.55    0.687   186.28
2042.55    0.667   186.35
2043.55    0.647   186.42
2044.55    0.627   186.49
2045.55    0.606   186.57
2046.55    0.585   186.66
2047.55    0.564   186.75
2048.55    0.543   186.85
2049.55    0.521   186.95
2050.55    0.500   187.07
2051.55    0.478   187.20
2052.55    0.456   187.33
2053.55    0.433   187.49
2054.55    0.411   187.66
2055.55    0.388   187.85
2056.55    0.365   188.06
2057.55    0.342   188.30
2058.55    0.319   188.58
2059.55    0.295   188.90
2060.55    0.272   189.27
2061.55    0.248   189.72
2062.55    0.224   190.26
2063.55    0.200   190.94
2064.55    0.176   191.80
2065.55    0.151   192.93
2066.55    0.127   194.50
2067.55    0.103   196.82
2068.55    0.078   200.57
2069.55    0.055   207.58
2070.55    0.033   224.36
2071.55    0.021   273.18
2072.55    0.032   324.25
2073.55    0.054   342.05
2074.55    0.077   349.38
2075.55    0.101   353.25
2076.55    0.125   355.63
2077.55    0.149   357.25
2078.55    0.173   358.42
2079.55    0.196   359.31
2080.55    0.218     0.01
2081.55    0.239     0.59
2082.55    0.259     1.08
2083.55    0.276     1.50
2084.55    0.290     1.88
2085.55    0.298     2.22
2086.55    0.294     2.57

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 18:53:53