Double Star Calculator - Orbit

Orbital Elements for STF3091AB
WDS: STF3091AB WDS ID/Discoverer
P: 143.220 Orbital period (years)
a: 0.691 Semi-major axis (arcseconds)
i: 93.0 Inclination (degrees)
Ω: 225.2 Longitude of ascending node (degrees)
T: 2027.990 Epoch of periastron passage (year)
e: 0.799 Eccentricity
ω: 104.7 Longitude of periastron (degrees)
Start-Year: 1953.39 Year
End-Year: 2096.61 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for STF3091AB
Position: 151601.56-045352.3 Epoch-2000 right ascension and declination
WDS-ID: 15160-0454 WDS designation
Discoverer Code: STF3091AB Discover designation and components
ADS number: 9557 Aitken Double Star catalog
HD number: 135578 HD catalog number
Hipparcos number: 74703 Hipparcos catalog number
V1: 7.74 Magnitude of the primary
V2: 8.48 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2018 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: USN2019 Reference

Double Star Orbit for STF3091AB



WDS 6th Orbit including measures of STF3091AB

-- 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 STF3091AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.094   220.90
--------------------------
1953.39    0.293   237.68
1954.39    0.302   237.25
1955.39    0.312   236.85
1956.39    0.322   236.48
1957.39    0.331   236.12
1958.39    0.341   235.79
1959.39    0.350   235.47
1960.39    0.359   235.17
1961.39    0.368   234.89
1962.39    0.377   234.62
1963.39    0.386   234.36
1964.39    0.395   234.11
1965.39    0.404   233.87
1966.39    0.412   233.65
1967.39    0.421   233.43
1968.39    0.429   233.22
1969.39    0.437   233.02
1970.39    0.445   232.82
1971.39    0.453   232.63
1972.39    0.460   232.45
1973.39    0.468   232.28
1974.39    0.475   232.11
1975.39    0.482   231.94
1976.39    0.489   231.78
1977.39    0.496   231.63
1978.39    0.502   231.48
1979.39    0.509   231.33
1980.39    0.515   231.18
1981.39    0.521   231.04
1982.39    0.527   230.90
1983.39    0.532   230.77
1984.39    0.537   230.64
1985.39    0.542   230.51
1986.39    0.547   230.38
1987.39    0.551   230.26
1988.39    0.556   230.13
1989.39    0.560   230.01
1990.39    0.563   229.89
1991.39    0.566   229.77
1992.39    0.569   229.66
1993.39    0.572   229.54
1994.39    0.574   229.42
1995.39    0.576   229.31
1996.39    0.578   229.20
1997.39    0.579   229.08
1998.39    0.580   228.97
1999.39    0.580   228.86
2000.39    0.580   228.75
2001.39    0.579   228.63
2002.39    0.577   228.52
2003.39    0.576   228.41
2004.39    0.573   228.29
2005.39    0.570   228.18
2006.39    0.566   228.06
2007.39    0.561   227.94
2008.39    0.556   227.82
2009.39    0.550   227.70
2010.39    0.543   227.57
2011.39    0.534   227.44
2012.39    0.525   227.31
2013.39    0.514   227.17
2014.39    0.502   227.02
2015.39    0.488   226.87
2016.39    0.473   226.70
2017.39    0.455   226.53
2018.39    0.436   226.34
2019.39    0.413   226.13
2020.39    0.387   225.89
2021.39    0.358   225.62
2022.39    0.323   225.29
2023.39    0.282   224.88
2024.39    0.234   224.31
2025.39    0.175   223.39
2026.39    0.103   221.33
2027.39    0.020   202.86
2028.39    0.070    50.48
2029.39    0.143    46.81
2030.39    0.195    45.48
2031.39    0.232    44.65
2032.39    0.257    44.02
2033.39    0.274    43.49
2034.39    0.285    43.00
2035.39    0.293    42.55
2036.39    0.297    42.12
2037.39    0.299    41.69
2038.39    0.299    41.27
2039.39    0.297    40.85
2040.39    0.294    40.41
2041.39    0.290    39.97
2042.39    0.285    39.51
2043.39    0.279    39.04
2044.39    0.272    38.54
2045.39    0.265    38.02
2046.39    0.258    37.47
2047.39    0.250    36.88
2048.39    0.241    36.25
2049.39    0.233    35.58
2050.39    0.224    34.86
2051.39    0.214    34.07
2052.39    0.205    33.21
2053.39    0.195    32.27
2054.39    0.186    31.23
2055.39    0.176    30.07
2056.39    0.166    28.77
2057.39    0.156    27.31
2058.39    0.146    25.65
2059.39    0.136    23.75
2060.39    0.126    21.55
2061.39    0.116    18.97
2062.39    0.107    15.93
2063.39    0.098    12.30
2064.39    0.089     7.94
2065.39    0.080     2.64
2066.39    0.073   356.19
2067.39    0.067   348.39
2068.39    0.062   339.15
2069.39    0.059   328.62
2070.39    0.058   317.32
2071.39    0.059   306.07
2072.39    0.062   295.65
2073.39    0.067   286.56
2074.39    0.074   278.91
2075.39    0.081   272.59
2076.39    0.090   267.40
2077.39    0.099   263.13
2078.39    0.108   259.58
2079.39    0.118   256.60
2080.39    0.127   254.08
2081.39    0.138   251.92
2082.39    0.148   250.06
2083.39    0.158   248.44
2084.39    0.168   247.02
2085.39    0.179   245.76
2086.39    0.189   244.64
2087.39    0.199   243.64
2088.39    0.209   242.73
2089.39    0.220   241.91
2090.39    0.230   241.17
2091.39    0.240   240.48
2092.39    0.250   239.86
2093.39    0.261   239.28
2094.39    0.271   238.74
2095.39    0.281   238.24
2096.39    0.290   237.78



 

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 17:13:36


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