Double Star Calculator - Orbit

Orbital Elements for STF1670AB

WDS:	STF1670AB	WDS ID/Discoverer
P:	169.104	Orbital period (years)
a:	3.639	Semi-major axis (arcseconds)
i:	149.46	Inclination (degrees)
Ω:	35.34	Longitude of ascending node (degrees)
T:	2005.511	Epoch of periastron passage (year)
e:	0.8815	Eccentricity
ω:	255.02	Longitude of periastron (degrees)
Start-Year:	1940.448	Year
End-Year:	2109.552	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1670AB
Position:	124139.60-012657.9	Epoch-2000 right ascension and declination
WDS-ID:	12417-0127	WDS designation
Discoverer Code:	STF1670AB	Discover designation and components
ADS number:	8630	Aitken Double Star catalog
HD number:	110379	HD catalog number
Hipparcos number:	61941	Hipparcos catalog number
V1:	3.48	Magnitude of the primary
V2:	3.53	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2006	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Sca2007c	Reference

Double Star Orbit for STF1670AB

WDS 6th Orbit including measures of STF1670AB

-- 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 STF1670AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    3.618   350.49
--------------------------
1940.45    5.716   316.12
1941.45    5.692   315.77
1942.45    5.667   315.41
1943.45    5.641   315.05
1944.45    5.614   314.69
1945.45    5.586   314.33
1946.45    5.556   313.96
1947.45    5.526   313.58
1948.45    5.494   313.21
1949.45    5.461   312.82
1950.45    5.427   312.44
1951.45    5.392   312.05
1952.45    5.355   311.65
1953.45    5.317   311.25
1954.45    5.278   310.84
1955.45    5.238   310.42
1956.45    5.197   310.00
1957.45    5.154   309.57
1958.45    5.110   309.14
1959.45    5.064   308.69
1960.45    5.017   308.24
1961.45    4.969   307.78
1962.45    4.919   307.31
1963.45    4.868   306.84
1964.45    4.816   306.35
1965.45    4.762   305.85
1966.45    4.707   305.34
1967.45    4.650   304.81
1968.45    4.591   304.27
1969.45    4.531   303.72
1970.45    4.469   303.16
1971.45    4.406   302.57
1972.45    4.340   301.98
1973.45    4.273   301.36
1974.45    4.205   300.72
1975.45    4.134   300.06
1976.45    4.061   299.38
1977.45    3.987   298.67
1978.45    3.910   297.93
1979.45    3.831   297.17
1980.45    3.750   296.37
1981.45    3.667   295.54
1982.45    3.582   294.66
1983.45    3.493   293.75
1984.45    3.403   292.78
1985.45    3.309   291.77
1986.45    3.213   290.69
1987.45    3.114   289.54
1988.45    3.011   288.32
1989.45    2.905   287.01
1990.45    2.796   285.60
1991.45    2.682   284.07
1992.45    2.565   282.40
1993.45    2.443   280.57
1994.45    2.316   278.55
1995.45    2.184   276.28
1996.45    2.045   273.71
1997.45    1.900   270.77
1998.45    1.748   267.32
1999.45    1.586   263.19
2000.45    1.415   258.09
2001.45    1.231   251.51
2002.45    1.031   242.50
2003.45    0.811   228.85
2004.45    0.571   204.17
2005.45    0.379   147.67
2006.45    0.506    79.28
2007.45    0.778    50.07
2008.45    1.037    35.94
2009.45    1.270    27.26
2010.45    1.482    21.18
2011.45    1.676    16.57
2012.45    1.857    12.89
2013.45    2.026     9.85
2014.45    2.184     7.26
2015.45    2.335     5.01
2016.45    2.477     3.03
2017.45    2.613     1.26
2018.45    2.743   359.66
2019.45    2.867   358.20
2020.45    2.986   356.87
2021.45    3.100   355.63
2022.45    3.210   354.48
2023.45    3.316   353.40
2024.45    3.419   352.39
2025.45    3.517   351.43
2026.45    3.613   350.53
2027.45    3.705   349.68
2028.45    3.794   348.86
2029.45    3.881   348.08
2030.45    3.964   347.34
2031.45    4.045   346.62
2032.45    4.124   345.93
2033.45    4.200   345.27
2034.45    4.274   344.63
2035.45    4.345   344.02
2036.45    4.415   343.42
2037.45    4.482   342.84
2038.45    4.547   342.28
2039.45    4.611   341.73
2040.45    4.672   341.20
2041.45    4.732   340.68
2042.45    4.789   340.17
2043.45    4.846   339.68
2044.45    4.900   339.20
2045.45    4.953   338.72
2046.45    5.004   338.26
2047.45    5.053   337.81
2048.45    5.101   337.36
2049.45    5.147   336.93
2050.45    5.192   336.50
2051.45    5.236   336.08
2052.45    5.278   335.66
2053.45    5.318   335.25
2054.45    5.357   334.85
2055.45    5.395   334.45
2056.45    5.432   334.06
2057.45    5.467   333.68
2058.45    5.501   333.30
2059.45    5.533   332.92
2060.45    5.564   332.55
2061.45    5.594   332.18
2062.45    5.623   331.81
2063.45    5.650   331.45
2064.45    5.677   331.10
2065.45    5.702   330.74
2066.45    5.726   330.39
2067.45    5.748   330.04
2068.45    5.770   329.70
2069.45    5.790   329.35
2070.45    5.810   329.01
2071.45    5.828   328.67
2072.45    5.845   328.34
2073.45    5.860   328.00
2074.45    5.875   327.67
2075.45    5.889   327.34
2076.45    5.901   327.01
2077.45    5.913   326.68
2078.45    5.923   326.35
2079.45    5.932   326.03
2080.45    5.941   325.70
2081.45    5.948   325.38
2082.45    5.954   325.05
2083.45    5.959   324.73
2084.45    5.963   324.41
2085.45    5.966   324.08
2086.45    5.967   323.76
2087.45    5.968   323.44
2088.45    5.968   323.12
2089.45    5.966   322.80
2090.45    5.964   322.47
2091.45    5.961   322.15
2092.45    5.956   321.83
2093.45    5.951   321.51
2094.45    5.944   321.18
2095.45    5.936   320.86
2096.45    5.928   320.53
2097.45    5.918   320.20
2098.45    5.907   319.88
2099.45    5.895   319.55
2100.45    5.883   319.22
2101.45    5.869   318.88
2102.45    5.854   318.55
2103.45    5.837   318.22
2104.45    5.820   317.88
2105.45    5.802   317.54
2106.45    5.783   317.20
2107.45    5.762   316.85
2108.45    5.741   316.51
2109.45    5.718   316.16

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 16:48:51