Double Star Calculator - Orbit

Orbital Elements for HO311

WDS:	HO311	WDS ID/Discoverer
P:	119.300	Orbital period (years)
a:	0.298	Semi-major axis (arcseconds)
i:	52.8	Inclination (degrees)
Ω:	32.8	Longitude of ascending node (degrees)
T:	1982.720	Epoch of periastron passage (year)
e:	0.888	Eccentricity
ω:	142.0	Longitude of periastron (degrees)
Start-Year:	1965.35	Year
End-Year:	2084.65	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HO311
Position:	015113.34+243908.0	Epoch-2000 right ascension and declination
WDS-ID:	01512+2439	WDS designation
Discoverer Code:	HO311	Discover designation and components
ADS number:	1473	Aitken Double Star catalog
HD number:	11284	HD catalog number
Hipparcos number:	8622	Hipparcos catalog number
V1:	8.22	Magnitude of the primary
V2:	7.82	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:	n	Flags
Ephemerides:		Ephemerides
Code:	Hrt1989	Reference

Double Star Orbit for HO311

WDS 6th Orbit including measures of HO311

-- 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 HO311

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.445     2.19
--------------------------
1965.35    0.345    23.13
1966.35    0.335    23.77
1967.35    0.324    24.46
1968.35    0.312    25.19
1969.35    0.300    25.99
1970.35    0.287    26.85
1971.35    0.273    27.80
1972.35    0.258    28.86
1973.35    0.243    30.05
1974.35    0.226    31.40
1975.35    0.208    32.99
1976.35    0.188    34.89
1977.35    0.167    37.26
1978.35    0.143    40.38
1979.35    0.116    44.83
1980.35    0.086    52.21
1981.35    0.051    69.02
1982.35    0.024   145.08
1983.35    0.041   225.43
1984.35    0.052   259.58
1985.35    0.064   282.10
1986.35    0.077   297.29
1987.35    0.092   307.84
1988.35    0.106   315.49
1989.35    0.121   321.28
1990.35    0.135   325.83
1991.35    0.149   329.51
1992.35    0.163   332.58
1993.35    0.176   335.17
1994.35    0.189   337.41
1995.35    0.201   339.36
1996.35    0.214   341.09
1997.35    0.225   342.64
1998.35    0.237   344.04
1999.35    0.248   345.31
2000.35    0.258   346.48
2001.35    0.269   347.55
2002.35    0.279   348.55
2003.35    0.288   349.47
2004.35    0.298   350.34
2005.35    0.307   351.16
2006.35    0.316   351.93
2007.35    0.325   352.65
2008.35    0.333   353.34
2009.35    0.341   354.00
2010.35    0.349   354.62
2011.35    0.357   355.22
2012.35    0.364   355.80
2013.35    0.371   356.35
2014.35    0.378   356.88
2015.35    0.385   357.39
2016.35    0.391   357.89
2017.35    0.397   358.37
2018.35    0.404   358.83
2019.35    0.409   359.28
2020.35    0.415   359.72
2021.35    0.421     0.15
2022.35    0.426     0.56
2023.35    0.431     0.97
2024.35    0.436     1.37
2025.35    0.440     1.75
2026.35    0.445     2.13
2027.35    0.449     2.51
2028.35    0.453     2.87
2029.35    0.457     3.23
2030.35    0.461     3.59
2031.35    0.464     3.94
2032.35    0.467     4.28
2033.35    0.471     4.62
2034.35    0.473     4.95
2035.35    0.476     5.28
2036.35    0.479     5.61
2037.35    0.481     5.93
2038.35    0.483     6.25
2039.35    0.485     6.57
2040.35    0.487     6.89
2041.35    0.489     7.20
2042.35    0.490     7.51
2043.35    0.492     7.82
2044.35    0.493     8.13
2045.35    0.494     8.43
2046.35    0.494     8.74
2047.35    0.495     9.04
2048.35    0.495     9.35
2049.35    0.495     9.65
2050.35    0.495     9.95
2051.35    0.495    10.26
2052.35    0.494    10.56
2053.35    0.494    10.87
2054.35    0.493    11.18
2055.35    0.492    11.48
2056.35    0.490    11.79
2057.35    0.489    12.10
2058.35    0.487    12.42
2059.35    0.485    12.73
2060.35    0.483    13.05
2061.35    0.481    13.37
2062.35    0.478    13.69
2063.35    0.475    14.02
2064.35    0.472    14.35
2065.35    0.469    14.69
2066.35    0.465    15.03
2067.35    0.461    15.38
2068.35    0.457    15.73
2069.35    0.453    16.09
2070.35    0.448    16.46
2071.35    0.443    16.83
2072.35    0.438    17.22
2073.35    0.433    17.61
2074.35    0.427    18.01
2075.35    0.421    18.43
2076.35    0.414    18.86
2077.35    0.407    19.30
2078.35    0.400    19.76
2079.35    0.393    20.23
2080.35    0.385    20.72
2081.35    0.376    21.24
2082.35    0.367    21.78
2083.35    0.358    22.34
2084.35    0.348    22.94

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 14:54:36