Double Star Calculator - Orbit

Orbital Elements for HWE4

WDS:	HWE4	WDS ID/Discoverer
P:	142.420	Orbital period (years)
a:	0.571	Semi-major axis (arcseconds)
i:	118.6	Inclination (degrees)
Ω:	133.7	Longitude of ascending node (degrees)
T:	2065.920	Epoch of periastron passage (year)
e:	0.837	Eccentricity
ω:	318.6	Longitude of periastron (degrees)
Start-Year:	1953.79	Year
End-Year:	2096.21	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HWE4
Position:	013342.39-121246.1	Epoch-2000 right ascension and declination
WDS-ID:	01337-1213	WDS designation
Discoverer Code:	HWE4	Discover designation and components
ADS number:	1223	Aitken Double Star catalog
HD number:	9575	HD catalog number
Hipparcos number:	7274	Hipparcos catalog number
V1:	9.23	Magnitude of the primary
V2:	9.31	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	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:	Doc2017i	Reference

Double Star Orbit for HWE4

WDS 6th Orbit including measures of HWE4

-- 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 HWE4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.829   327.42
--------------------------
1953.79    0.509   355.03
1954.79    0.523   354.22
1955.79    0.536   353.45
1956.79    0.549   352.71
1957.79    0.561   352.01
1958.79    0.573   351.34
1959.79    0.585   350.70
1960.79    0.597   350.08
1961.79    0.609   349.49
1962.79    0.620   348.91
1963.79    0.631   348.36
1964.79    0.642   347.83
1965.79    0.652   347.31
1966.79    0.663   346.81
1967.79    0.673   346.33
1968.79    0.682   345.86
1969.79    0.692   345.40
1970.79    0.701   344.96
1971.79    0.710   344.52
1972.79    0.719   344.10
1973.79    0.728   343.69
1974.79    0.736   343.29
1975.79    0.744   342.89
1976.79    0.752   342.51
1977.79    0.760   342.13
1978.79    0.767   341.76
1979.79    0.775   341.40
1980.79    0.782   341.04
1981.79    0.788   340.69
1982.79    0.795   340.35
1983.79    0.801   340.01
1984.79    0.807   339.67
1985.79    0.813   339.34
1986.79    0.819   339.02
1987.79    0.824   338.70
1988.79    0.829   338.38
1989.79    0.834   338.07
1990.79    0.838   337.76
1991.79    0.843   337.46
1992.79    0.847   337.15
1993.79    0.851   336.85
1994.79    0.854   336.56
1995.79    0.858   336.26
1996.79    0.861   335.97
1997.79    0.864   335.68
1998.79    0.866   335.39
1999.79    0.869   335.10
2000.79    0.871   334.82
2001.79    0.873   334.54
2002.79    0.874   334.25
2003.79    0.876   333.97
2004.79    0.877   333.69
2005.79    0.878   333.41
2006.79    0.878   333.13
2007.79    0.878   332.85
2008.79    0.878   332.57
2009.79    0.878   332.29
2010.79    0.878   332.01
2011.79    0.877   331.73
2012.79    0.876   331.45
2013.79    0.874   331.17
2014.79    0.873   330.88
2015.79    0.871   330.60
2016.79    0.868   330.31
2017.79    0.866   330.03
2018.79    0.863   329.74
2019.79    0.859   329.45
2020.79    0.856   329.15
2021.79    0.852   328.86
2022.79    0.848   328.56
2023.79    0.843   328.25
2024.79    0.838   327.95
2025.79    0.833   327.64
2026.79    0.827   327.33
2027.79    0.821   327.01
2028.79    0.814   326.68
2029.79    0.807   326.36
2030.79    0.800   326.02
2031.79    0.792   325.68
2032.79    0.784   325.33
2033.79    0.775   324.98
2034.79    0.766   324.62
2035.79    0.757   324.24
2036.79    0.746   323.86
2037.79    0.736   323.47
2038.79    0.725   323.06
2039.79    0.713   322.65
2040.79    0.700   322.21
2041.79    0.687   321.76
2042.79    0.674   321.30
2043.79    0.659   320.81
2044.79    0.644   320.30
2045.79    0.629   319.77
2046.79    0.612   319.21
2047.79    0.594   318.62
2048.79    0.576   317.99
2049.79    0.557   317.31
2050.79    0.536   316.59
2051.79    0.514   315.81
2052.79    0.492   314.96
2053.79    0.467   314.02
2054.79    0.442   312.97
2055.79    0.414   311.79
2056.79    0.385   310.44
2057.79    0.353   308.85
2058.79    0.319   306.94
2059.79    0.282   304.54
2060.79    0.242   301.39
2061.79    0.198   296.88
2062.79    0.149   289.56
2063.79    0.096   274.53
2064.79    0.054   229.91
2065.79    0.071   161.83
2066.79    0.105   133.58
2067.79    0.122   117.13
2068.79    0.129   103.55
2069.79    0.134    91.12
2070.79    0.140    79.60
2071.79    0.147    69.11
2072.79    0.157    59.76
2073.79    0.169    51.58
2074.79    0.182    44.52
2075.79    0.196    38.44
2076.79    0.211    33.21
2077.79    0.227    28.69
2078.79    0.243    24.76
2079.79    0.259    21.32
2080.79    0.275    18.29
2081.79    0.292    15.60
2082.79    0.308    13.20
2083.79    0.324    11.03
2084.79    0.340     9.08
2085.79    0.356     7.30
2086.79    0.372     5.67
2087.79    0.388     4.17
2088.79    0.403     2.79
2089.79    0.418     1.51
2090.79    0.433     0.32
2091.79    0.448   359.21
2092.79    0.462   358.16
2093.79    0.476   357.18
2094.79    0.490   356.26
2095.79    0.504   355.38

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 14:51:46