Double Star Calculator - Orbit

Orbital Elements for STT89

WDS:	STT89	WDS ID/Discoverer
P:	140.700	Orbital period (years)
a:	0.373	Semi-major axis (arcseconds)
i:	83.6	Inclination (degrees)
Ω:	111.9	Longitude of ascending node (degrees)
T:	1919.080	Epoch of periastron passage (year)
e:	0.878	Eccentricity
ω:	50.9	Longitude of periastron (degrees)
Start-Year:	1954.65	Year
End-Year:	2095.35	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT89
Position:	050439.67+740401.0	Epoch-2000 right ascension and declination
WDS-ID:	05047+7404	WDS designation
Discoverer Code:	STT89	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	31590	HD catalog number
Hipparcos number:	23617	Hipparcos catalog number
V1:	6.53	Magnitude of the primary
V2:	7.29	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2003	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:	Alz2020c	Reference

Double Star Orbit for STT89

WDS 6th Orbit including measures of STT89

-- 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 STT89

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.239   305.79
--------------------------
1954.65    0.465   296.75
1955.65    0.468   296.83
1956.65    0.470   296.92
1957.65    0.472   297.01
1958.65    0.474   297.09
1959.65    0.476   297.17
1960.65    0.477   297.26
1961.65    0.479   297.34
1962.65    0.480   297.42
1963.65    0.480   297.51
1964.65    0.481   297.59
1965.65    0.482   297.67
1966.65    0.482   297.75
1967.65    0.482   297.83
1968.65    0.482   297.92
1969.65    0.482   298.00
1970.65    0.482   298.08
1971.65    0.481   298.16
1972.65    0.480   298.24
1973.65    0.479   298.33
1974.65    0.478   298.41
1975.65    0.477   298.49
1976.65    0.476   298.58
1977.65    0.474   298.66
1978.65    0.473   298.74
1979.65    0.471   298.83
1980.65    0.469   298.92
1981.65    0.467   299.00
1982.65    0.465   299.09
1983.65    0.462   299.18
1984.65    0.460   299.27
1985.65    0.457   299.36
1986.65    0.454   299.45
1987.65    0.451   299.54
1988.65    0.448   299.64
1989.65    0.445   299.73
1990.65    0.442   299.83
1991.65    0.438   299.93
1992.65    0.435   300.03
1993.65    0.431   300.13
1994.65    0.427   300.23
1995.65    0.423   300.33
1996.65    0.419   300.44
1997.65    0.415   300.55
1998.65    0.411   300.66
1999.65    0.406   300.78
2000.65    0.402   300.89
2001.65    0.397   301.01
2002.65    0.392   301.13
2003.65    0.387   301.26
2004.65    0.382   301.39
2005.65    0.377   301.52
2006.65    0.371   301.66
2007.65    0.366   301.80
2008.65    0.360   301.94
2009.65    0.355   302.09
2010.65    0.349   302.24
2011.65    0.343   302.40
2012.65    0.337   302.57
2013.65    0.330   302.74
2014.65    0.324   302.91
2015.65    0.318   303.10
2016.65    0.311   303.29
2017.65    0.304   303.49
2018.65    0.297   303.70
2019.65    0.290   303.92
2020.65    0.283   304.15
2021.65    0.276   304.39
2022.65    0.269   304.65
2023.65    0.261   304.92
2024.65    0.254   305.21
2025.65    0.246   305.51
2026.65    0.238   305.84
2027.65    0.230   306.18
2028.65    0.222   306.56
2029.65    0.214   306.96
2030.65    0.205   307.39
2031.65    0.197   307.86
2032.65    0.188   308.37
2033.65    0.179   308.93
2034.65    0.170   309.56
2035.65    0.161   310.25
2036.65    0.152   311.02
2037.65    0.143   311.89
2038.65    0.134   312.88
2039.65    0.124   314.03
2040.65    0.115   315.36
2041.65    0.105   316.95
2042.65    0.095   318.85
2043.65    0.085   321.19
2044.65    0.076   324.13
2045.65    0.066   327.95
2046.65    0.057   333.04
2047.65    0.048   340.12
2048.65    0.040   350.26
2049.65    0.033     4.89
2050.65    0.030    24.56
2051.65    0.030    46.35
2052.65    0.034    65.12
2053.65    0.041    78.84
2054.65    0.049    88.45
2055.65    0.056    95.39
2056.65    0.063   100.72
2057.65    0.067   105.17
2058.65    0.062   109.58
2059.65    0.035   117.29
2060.65    0.022   275.24
2061.65    0.071   287.14
2062.65    0.111   289.50
2063.65    0.144   290.68
2064.65    0.172   291.45
2065.65    0.197   292.01
2066.65    0.218   292.45
2067.65    0.238   292.81
2068.65    0.256   293.13
2069.65    0.273   293.40
2070.65    0.288   293.64
2071.65    0.302   293.86
2072.65    0.315   294.06
2073.65    0.327   294.24
2074.65    0.339   294.41
2075.65    0.349   294.57
2076.65    0.359   294.73
2077.65    0.369   294.87
2078.65    0.377   295.01
2079.65    0.386   295.14
2080.65    0.393   295.26
2081.65    0.401   295.38
2082.65    0.408   295.50
2083.65    0.414   295.61
2084.65    0.420   295.72
2085.65    0.426   295.83
2086.65    0.431   295.93
2087.65    0.436   296.03
2088.65    0.441   296.13
2089.65    0.445   296.22
2090.65    0.450   296.32
2091.65    0.453   296.41
2092.65    0.457   296.50
2093.65    0.460   296.60
2094.65    0.463   296.68

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 15:33:24