Double Star Calculator - Orbit

Orbital Elements for STF1888AB
WDS: STF1888AB WDS ID/Discoverer
P: 151.870 Orbital period (years)
a: 4.92219 Semi-major axis (arcseconds)
i: 140.2816 Inclination (degrees)
Ω: 167.9575 Longitude of ascending node (degrees)
T: 1909.377 Epoch of periastron passage (year)
e: 0.51168 Eccentricity
ω: 23.8399 Longitude of periastron (degrees)
Start-Year: 1949.064848 Year
End-Year: 2100.935152 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1888AB
Position: 145123.38+190601.7 Epoch-2000 right ascension and declination
WDS-ID: 14514+1906 WDS designation
Discoverer Code: STF1888AB Discover designation and components
ADS number: 9413 Aitken Double Star catalog
HD number: 131156 HD catalog number
Hipparcos number: 72659 Hipparcos catalog number
V1: 4.76 Magnitude of the primary
V2: 6.95 Magnitude of the secondary
Equinox: Equinox
Date: 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: Kpp2020f Reference

Double Star Orbit for STF1888AB



WDS 6th Orbit including measures of STF1888AB

-- 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 STF1888AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    4.669   286.50
--------------------------
1949.06    6.103   357.86
1950.06    6.186   356.85
1951.06    6.265   355.87
1952.06    6.340   354.92
1953.06    6.413   353.98
1954.06    6.482   353.07
1955.06    6.548   352.18
1956.06    6.611   351.30
1957.06    6.670   350.44
1958.06    6.727   349.59
1959.06    6.781   348.76
1960.06    6.831   347.94
1961.06    6.878   347.14
1962.06    6.923   346.34
1963.06    6.965   345.55
1964.06    7.003   344.77
1965.06    7.039   344.00
1966.06    7.072   343.24
1967.06    7.102   342.48
1968.06    7.130   341.74
1969.06    7.154   340.99
1970.06    7.176   340.25
1971.06    7.195   339.52
1972.06    7.212   338.79
1973.06    7.226   338.06
1974.06    7.237   337.33
1975.06    7.245   336.61
1976.06    7.251   335.89
1977.06    7.255   335.16
1978.06    7.256   334.44
1979.06    7.254   333.72
1980.06    7.250   333.00
1981.06    7.243   332.28
1982.06    7.234   331.55
1983.06    7.223   330.83
1984.06    7.209   330.10
1985.06    7.193   329.37
1986.06    7.174   328.63
1987.06    7.153   327.89
1988.06    7.130   327.15
1989.06    7.104   326.40
1990.06    7.076   325.64
1991.06    7.045   324.88
1992.06    7.013   324.11
1993.06    6.978   323.34
1994.06    6.941   322.55
1995.06    6.901   321.76
1996.06    6.860   320.96
1997.06    6.816   320.15
1998.06    6.770   319.33
1999.06    6.722   318.49
2000.06    6.672   317.65
2001.06    6.619   316.79
2002.06    6.565   315.91
2003.06    6.508   315.02
2004.06    6.450   314.12
2005.06    6.389   313.20
2006.06    6.327   312.26
2007.06    6.262   311.30
2008.06    6.195   310.32
2009.06    6.127   309.32
2010.06    6.056   308.30
2011.06    5.984   307.25
2012.06    5.910   306.18
2013.06    5.834   305.08
2014.06    5.757   303.95
2015.06    5.677   302.79
2016.06    5.596   301.59
2017.06    5.514   300.36
2018.06    5.430   299.10
2019.06    5.344   297.79
2020.06    5.257   296.44
2021.06    5.169   295.04
2022.06    5.079   293.60
2023.06    4.988   292.10
2024.06    4.897   290.54
2025.06    4.804   288.93
2026.06    4.710   287.25
2027.06    4.616   285.51
2028.06    4.521   283.69
2029.06    4.426   281.79
2030.06    4.331   279.81
2031.06    4.236   277.74
2032.06    4.140   275.58
2033.06    4.046   273.31
2034.06    3.952   270.94
2035.06    3.859   268.45
2036.06    3.767   265.84
2037.06    3.677   263.10
2038.06    3.589   260.22
2039.06    3.503   257.20
2040.06    3.419   254.03
2041.06    3.339   250.71
2042.06    3.262   247.22
2043.06    3.189   243.57
2044.06    3.120   239.76
2045.06    3.055   235.77
2046.06    2.994   231.62
2047.06    2.939   227.31
2048.06    2.887   222.83
2049.06    2.841   218.21
2050.06    2.798   213.43
2051.06    2.758   208.51
2052.06    2.721   203.45
2053.06    2.686   198.26
2054.06    2.651   192.93
2055.06    2.616   187.46
2056.06    2.578   181.83
2057.06    2.537   176.03
2058.06    2.491   170.02
2059.06    2.442   163.78
2060.06    2.388   157.27
2061.06    2.332   150.46
2062.06    2.277   143.31
2063.06    2.226   135.82
2064.06    2.182   128.00
2065.06    2.152   119.91
2066.06    2.139   111.65
2067.06    2.145   103.36
2068.06    2.173    95.21
2069.06    2.223    87.34
2070.06    2.294    79.88
2071.06    2.383    72.93
2072.06    2.488    66.52
2073.06    2.607    60.66
2074.06    2.735    55.34
2075.06    2.872    50.50
2076.06    3.014    46.12
2077.06    3.160    42.13
2078.06    3.309    38.50
2079.06    3.458    35.18
2080.06    3.607    32.14
2081.06    3.756    29.34
2082.06    3.903    26.75
2083.06    4.048    24.35
2084.06    4.191    22.11
2085.06    4.331    20.02
2086.06    4.468    18.06
2087.06    4.602    16.21
2088.06    4.733    14.47
2089.06    4.860    12.82
2090.06    4.984    11.25
2091.06    5.104     9.76
2092.06    5.221     8.34
2093.06    5.335     6.97
2094.06    5.444     5.67
2095.06    5.551     4.41
2096.06    5.653     3.20
2097.06    5.752     2.04
2098.06    5.848     0.91
2099.06    5.940   359.82
2100.06    6.029   358.76






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 17:09:33



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