Double Star Calculator - Orbit

Orbital Elements for STF234AB

WDS:	STF234AB	WDS ID/Discoverer
P:	139.868	Orbital period (years)
a:	0.51	Semi-major axis (arcseconds)
i:	123.5	Inclination (degrees)
Ω:	54.8	Longitude of ascending node (degrees)
T:	1909.214	Epoch of periastron passage (year)
e:	0.718	Eccentricity
ω:	353.9	Longitude of periastron (degrees)
Start-Year:	1955.066	Year
End-Year:	2094.934	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF234AB
Position:	021723.00+612106.5	Epoch-2000 right ascension and declination
WDS-ID:	02174+6121	WDS designation
Discoverer Code:	STF234AB	Discover designation and components
ADS number:	1737	Aitken Double Star catalog
HD number:	13864	HD catalog number
Hipparcos number:	10677	Hipparcos catalog number
V1:	8.74	Magnitude of the primary
V2:	9.40	Magnitude of the secondary
Equinox:	1900	Equinox
Date:	1978	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Sta1983	Reference

Double Star Orbit for STF234AB

WDS 6th Orbit including measures of STF234AB

-- 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 STF234AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.507   215.63
--------------------------
1955.07    0.763   247.13
1956.07    0.772   246.69
1957.07    0.780   246.26
1958.07    0.787   245.85
1959.07    0.795   245.43
1960.07    0.802   245.03
1961.07    0.808   244.63
1962.07    0.815   244.24
1963.07    0.821   243.86
1964.07    0.826   243.48
1965.07    0.832   243.10
1966.07    0.837   242.74
1967.07    0.841   242.37
1968.07    0.846   242.01
1969.07    0.850   241.65
1970.07    0.853   241.30
1971.07    0.857   240.94
1972.07    0.860   240.60
1973.07    0.863   240.25
1974.07    0.865   239.90
1975.07    0.867   239.56
1976.07    0.869   239.22
1977.07    0.871   238.88
1978.07    0.872   238.54
1979.07    0.873   238.20
1980.07    0.873   237.87
1981.07    0.873   237.53
1982.07    0.873   237.19
1983.07    0.873   236.85
1984.07    0.872   236.52
1985.07    0.871   236.18
1986.07    0.870   235.84
1987.07    0.868   235.50
1988.07    0.866   235.16
1989.07    0.864   234.81
1990.07    0.861   234.47
1991.07    0.858   234.12
1992.07    0.855   233.77
1993.07    0.851   233.41
1994.07    0.847   233.06
1995.07    0.843   232.70
1996.07    0.838   232.33
1997.07    0.833   231.97
1998.07    0.828   231.59
1999.07    0.822   231.21
2000.07    0.816   230.83
2001.07    0.810   230.44
2002.07    0.803   230.05
2003.07    0.796   229.64
2004.07    0.788   229.23
2005.07    0.780   228.82
2006.07    0.772   228.39
2007.07    0.763   227.95
2008.07    0.754   227.51
2009.07    0.745   227.05
2010.07    0.735   226.58
2011.07    0.725   226.09
2012.07    0.714   225.60
2013.07    0.703   225.08
2014.07    0.691   224.55
2015.07    0.679   224.01
2016.07    0.667   223.44
2017.07    0.654   222.85
2018.07    0.640   222.23
2019.07    0.626   221.59
2020.07    0.612   220.92
2021.07    0.597   220.22
2022.07    0.582   219.48
2023.07    0.566   218.70
2024.07    0.549   217.87
2025.07    0.532   216.99
2026.07    0.515   216.05
2027.07    0.497   215.05
2028.07    0.478   213.96
2029.07    0.458   212.79
2030.07    0.438   211.51
2031.07    0.418   210.10
2032.07    0.396   208.55
2033.07    0.374   206.82
2034.07    0.352   204.86
2035.07    0.328   202.64
2036.07    0.304   200.06
2037.07    0.280   197.05
2038.07    0.255   193.45
2039.07    0.230   189.07
2040.07    0.205   183.62
2041.07    0.181   176.67
2042.07    0.158   167.64
2043.07    0.138   155.80
2044.07    0.124   140.62
2045.07    0.117   122.58
2046.07    0.118   103.73
2047.07    0.126    86.41
2048.07    0.136    71.48
2049.07    0.143    58.38
2050.07    0.144    46.03
2051.07    0.141    33.42
2052.07    0.135    19.90
2053.07    0.131     5.35
2054.07    0.132   350.39
2055.07    0.138   336.15
2056.07    0.149   323.56
2057.07    0.164   313.02
2058.07    0.182   304.41
2059.07    0.202   297.42
2060.07    0.223   291.72
2061.07    0.245   287.00
2062.07    0.266   283.05
2063.07    0.288   279.69
2064.07    0.309   276.80
2065.07    0.330   274.29
2066.07    0.351   272.07
2067.07    0.372   270.10
2068.07    0.392   268.33
2069.07    0.411   266.73
2070.07    0.430   265.28
2071.07    0.449   263.95
2072.07    0.467   262.72
2073.07    0.484   261.58
2074.07    0.502   260.52
2075.07    0.518   259.53
2076.07    0.534   258.61
2077.07    0.550   257.73
2078.07    0.566   256.91
2079.07    0.581   256.12
2080.07    0.595   255.38
2081.07    0.609   254.67
2082.07    0.623   253.99
2083.07    0.636   253.34
2084.07    0.649   252.72
2085.07    0.661   252.12
2086.07    0.673   251.54
2087.07    0.685   250.98
2088.07    0.696   250.44
2089.07    0.707   249.92
2090.07    0.717   249.41
2091.07    0.727   248.92
2092.07    0.737   248.44
2093.07    0.747   247.97
2094.07    0.756   247.52

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 14:59:00