Double Star Calculator - Orbit

Orbital Elements for STF2384AB

WDS:	STF2384AB	WDS ID/Discoverer
P:	128.600	Orbital period (years)
a:	0.629	Semi-major axis (arcseconds)
i:	87.7	Inclination (degrees)
Ω:	128.5	Longitude of ascending node (degrees)
T:	2001.890	Epoch of periastron passage (year)
e:	0.649	Eccentricity
ω:	353.5	Longitude of periastron (degrees)
Start-Year:	1960.7	Year
End-Year:	2089.3	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2384AB
Position:	183823.66+670735.6	Epoch-2000 right ascension and declination
WDS-ID:	18384+6708	WDS designation
Discoverer Code:	STF2384AB	Discover designation and components
ADS number:	11568	Aitken Double Star catalog
HD number:	173084	HD catalog number
Hipparcos number:	91395	Hipparcos catalog number
V1:	8.31	Magnitude of the primary
V2:	8.95	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2023	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:	Doc2024b	Reference

Double Star Orbit for STF2384AB

WDS 6th Orbit including measures of STF2384AB

-- 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 STF2384AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.514   306.15
--------------------------
1960.70    0.916   309.02
1961.70    0.904   309.06
1962.70    0.891   309.11
1963.70    0.877   309.15
1964.70    0.863   309.19
1965.70    0.848   309.24
1966.70    0.832   309.29
1967.70    0.816   309.34
1968.70    0.798   309.39
1969.70    0.781   309.44
1970.70    0.762   309.50
1971.70    0.742   309.56
1972.70    0.722   309.62
1973.70    0.701   309.69
1974.70    0.679   309.76
1975.70    0.656   309.84
1976.70    0.632   309.92
1977.70    0.608   310.01
1978.70    0.582   310.10
1979.70    0.556   310.21
1980.70    0.528   310.32
1981.70    0.500   310.45
1982.70    0.470   310.60
1983.70    0.439   310.76
1984.70    0.407   310.95
1985.70    0.374   311.17
1986.70    0.340   311.43
1987.70    0.305   311.76
1988.70    0.268   312.17
1989.70    0.231   312.72
1990.70    0.192   313.48
1991.70    0.152   314.65
1992.70    0.110   316.66
1993.70    0.069   321.12
1994.70    0.028   339.05
1995.70    0.023    94.35
1996.70    0.063   117.72
1997.70    0.104   122.81
1998.70    0.143   125.07
1999.70    0.176   126.40
2000.70    0.202   127.34
2001.70    0.218   128.10
2002.70    0.221   128.80
2003.70    0.214   129.51
2004.70    0.196   130.31
2005.70    0.171   131.32
2006.70    0.140   132.72
2007.70    0.107   134.98
2008.70    0.071   139.43
2009.70    0.036   152.65
2010.70    0.016   233.98
2011.70    0.045   286.53
2012.70    0.081   295.86
2013.70    0.117   299.45
2014.70    0.152   301.35
2015.70    0.187   302.53
2016.70    0.222   303.35
2017.70    0.255   303.94
2018.70    0.288   304.41
2019.70    0.319   304.77
2020.70    0.350   305.08
2021.70    0.380   305.33
2022.70    0.410   305.55
2023.70    0.438   305.73
2024.70    0.466   305.90
2025.70    0.493   306.05
2026.70    0.519   306.18
2027.70    0.544   306.30
2028.70    0.569   306.41
2029.70    0.593   306.51
2030.70    0.616   306.60
2031.70    0.638   306.69
2032.70    0.660   306.77
2033.70    0.681   306.84
2034.70    0.701   306.91
2035.70    0.721   306.98
2036.70    0.740   307.04
2037.70    0.758   307.10
2038.70    0.776   307.16
2039.70    0.793   307.22
2040.70    0.809   307.27
2041.70    0.825   307.32
2042.70    0.840   307.37
2043.70    0.855   307.42
2044.70    0.868   307.46
2045.70    0.882   307.51
2046.70    0.895   307.55
2047.70    0.907   307.59
2048.70    0.918   307.63
2049.70    0.929   307.67
2050.70    0.940   307.71
2051.70    0.950   307.75
2052.70    0.959   307.78
2053.70    0.968   307.82
2054.70    0.976   307.86
2055.70    0.984   307.89
2056.70    0.991   307.93
2057.70    0.997   307.96
2058.70    1.003   307.99
2059.70    1.009   308.03
2060.70    1.014   308.06
2061.70    1.018   308.09
2062.70    1.022   308.13
2063.70    1.025   308.16
2064.70    1.028   308.19
2065.70    1.030   308.22
2066.70    1.031   308.25
2067.70    1.032   308.29
2068.70    1.033   308.32
2069.70    1.033   308.35
2070.70    1.032   308.38
2071.70    1.031   308.41
2072.70    1.029   308.44
2073.70    1.027   308.48
2074.70    1.024   308.51
2075.70    1.021   308.54
2076.70    1.017   308.57
2077.70    1.012   308.61
2078.70    1.007   308.64
2079.70    1.001   308.67
2080.70    0.995   308.71
2081.70    0.988   308.74
2082.70    0.981   308.78
2083.70    0.973   308.81
2084.70    0.964   308.85
2085.70    0.955   308.88
2086.70    0.945   308.92
2087.70    0.934   308.96
2088.70    0.923   309.00

Disclaimer

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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 17:53:34