Double Star Calculator - Orbit

Orbital Elements for HU138

WDS:	HU138	WDS ID/Discoverer
P:	142.800	Orbital period (years)
a:	0.4477	Semi-major axis (arcseconds)
i:	43.5	Inclination (degrees)
Ω:	74.3	Longitude of ascending node (degrees)
T:	1938.260	Epoch of periastron passage (year)
e:	0.571	Eccentricity
ω:	304.9	Longitude of periastron (degrees)
Start-Year:	1953.6	Year
End-Year:	2096.4	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU138
Position:	141600.46-070343.4	Epoch-2000 right ascension and declination
WDS-ID:	14160-0704	WDS designation
Discoverer Code:	HU138	Discover designation and components
ADS number:	9186	Aitken Double Star catalog
HD number:	124851	HD catalog number
Hipparcos number:	69700	Hipparcos catalog number
V1:	9.80	Magnitude of the primary
V2:	9.79	Magnitude of the secondary
Equinox:		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:	Tok2024d	Reference

Double Star Orbit for HU138

WDS 6th Orbit including measures of HU138

-- 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 HU138

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.603   222.45
--------------------------
1953.60    0.302   115.83
1954.60    0.308   119.06
1955.60    0.313   122.18
1956.60    0.319   125.20
1957.60    0.324   128.11
1958.60    0.329   130.93
1959.60    0.335   133.67
1960.60    0.340   136.31
1961.60    0.345   138.88
1962.60    0.351   141.37
1963.60    0.356   143.78
1964.60    0.361   146.12
1965.60    0.367   148.39
1966.60    0.372   150.59
1967.60    0.378   152.73
1968.60    0.383   154.81
1969.60    0.389   156.82
1970.60    0.395   158.78
1971.60    0.400   160.69
1972.60    0.406   162.54
1973.60    0.412   164.34
1974.60    0.417   166.09
1975.60    0.423   167.79
1976.60    0.429   169.45
1977.60    0.434   171.06
1978.60    0.440   172.64
1979.60    0.446   174.17
1980.60    0.451   175.67
1981.60    0.457   177.13
1982.60    0.462   178.55
1983.60    0.468   179.94
1984.60    0.473   181.30
1985.60    0.479   182.63
1986.60    0.484   183.93
1987.60    0.489   185.20
1988.60    0.494   186.44
1989.60    0.500   187.66
1990.60    0.505   188.85
1991.60    0.509   190.02
1992.60    0.514   191.17
1993.60    0.519   192.30
1994.60    0.524   193.40
1995.60    0.528   194.49
1996.60    0.533   195.56
1997.60    0.537   196.61
1998.60    0.542   197.65
1999.60    0.546   198.66
2000.60    0.550   199.67
2001.60    0.554   200.66
2002.60    0.557   201.63
2003.60    0.561   202.59
2004.60    0.565   203.54
2005.60    0.568   204.48
2006.60    0.571   205.41
2007.60    0.575   206.32
2008.60    0.578   207.23
2009.60    0.580   208.13
2010.60    0.583   209.02
2011.60    0.586   209.90
2012.60    0.588   210.77
2013.60    0.590   211.64
2014.60    0.592   212.50
2015.60    0.594   213.35
2016.60    0.596   214.20
2017.60    0.598   215.05
2018.60    0.599   215.89
2019.60    0.600   216.73
2020.60    0.601   217.56
2021.60    0.602   218.39
2022.60    0.603   219.22
2023.60    0.603   220.05
2024.60    0.603   220.88
2025.60    0.603   221.70
2026.60    0.603   222.53
2027.60    0.603   223.36
2028.60    0.602   224.19
2029.60    0.601   225.02
2030.60    0.600   225.85
2031.60    0.599   226.69
2032.60    0.597   227.53
2033.60    0.596   228.37
2034.60    0.594   229.22
2035.60    0.591   230.08
2036.60    0.589   230.95
2037.60    0.586   231.82
2038.60    0.583   232.70
2039.60    0.579   233.59
2040.60    0.575   234.49
2041.60    0.571   235.41
2042.60    0.567   236.34
2043.60    0.562   237.28
2044.60    0.557   238.24
2045.60    0.552   239.22
2046.60    0.546   240.22
2047.60    0.540   241.24
2048.60    0.534   242.28
2049.60    0.527   243.35
2050.60    0.520   244.45
2051.60    0.512   245.58
2052.60    0.504   246.75
2053.60    0.495   247.95
2054.60    0.486   249.20
2055.60    0.476   250.50
2056.60    0.466   251.86
2057.60    0.456   253.27
2058.60    0.445   254.76
2059.60    0.433   256.32
2060.60    0.421   257.97
2061.60    0.408   259.72
2062.60    0.394   261.59
2063.60    0.380   263.60
2064.60    0.365   265.76
2065.60    0.350   268.12
2066.60    0.334   270.69
2067.60    0.317   273.53
2068.60    0.300   276.70
2069.60    0.281   280.27
2070.60    0.263   284.33
2071.60    0.244   289.02
2072.60    0.225   294.49
2073.60    0.207   300.96
2074.60    0.189   308.68
2075.60    0.173   317.92
2076.60    0.160   328.87
2077.60    0.150   341.47
2078.60    0.146   355.23
2079.60    0.148     9.24
2080.60    0.154    22.52
2081.60    0.164    34.42
2082.60    0.177    44.79
2083.60    0.190    53.74
2084.60    0.203    61.51
2085.60    0.216    68.36
2086.60    0.228    74.47
2087.60    0.238    80.00
2088.60    0.248    85.08
2089.60    0.257    89.80
2090.60    0.265    94.21
2091.60    0.273    98.38
2092.60    0.279   102.33
2093.60    0.286   106.09
2094.60    0.292   109.70
2095.60    0.298   113.16

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 17:04:22