Double Star Calculator - Orbit

Orbital Elements for STF2028
WDS: STF2028 WDS ID/Discoverer
P: 105.340 Orbital period (years)
a: 0.399 Semi-major axis (arcseconds)
i: 83.6 Inclination (degrees)
Ω: 145.5 Longitude of ascending node (degrees)
T: 1993.380 Epoch of periastron passage (year)
e: 0.616 Eccentricity
ω: 223.7 Longitude of periastron (degrees)
Start-Year: 1972.33 Year
End-Year: 2077.67 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2028
Position: 161248.11+392135.6 Epoch-2000 right ascension and declination
WDS-ID: 16128+3922 WDS designation
Discoverer Code: STF2028 Discover designation and components
ADS number: 9970 Aitken Double Star catalog
HD number: 146100 HD catalog number
Hipparcos number: 79448 Hipparcos catalog number
V1: 9.88 Magnitude of the primary
V2: 9.14 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 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: Hrt2014b Reference

Double Star Orbit for STF2028



WDS 6th Orbit including measures of STF2028

-- 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 STF2028
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.537   148.09
--------------------------
1972.33    0.070   192.75
1973.33    0.059   204.33
1974.33    0.051   220.44
1975.33    0.048   240.44
1976.33    0.051   260.47
1977.33    0.059   276.64
1978.33    0.070   288.28
1979.33    0.083   296.49
1980.33    0.097   302.40
1981.33    0.111   306.82
1982.33    0.125   310.25
1983.33    0.139   312.99
1984.33    0.152   315.25
1985.33    0.163   317.19
1986.33    0.172   318.88
1987.33    0.179   320.42
1988.33    0.183   321.87
1989.33    0.183   323.29
1990.33    0.176   324.76
1991.33    0.163   326.41
1992.33    0.142   328.45
1993.33    0.113   331.39
1994.33    0.077   336.80
1995.33    0.039   352.60
1996.33    0.021    77.68
1997.33    0.055   123.37
1998.33    0.094   132.66
1999.33    0.132   136.50
2000.33    0.168   138.64
2001.33    0.201   140.05
2002.33    0.232   141.07
2003.33    0.261   141.86
2004.33    0.288   142.49
2005.33    0.313   143.02
2006.33    0.335   143.48
2007.33    0.356   143.87
2008.33    0.376   144.23
2009.33    0.394   144.55
2010.33    0.410   144.85
2011.33    0.426   145.12
2012.33    0.440   145.38
2013.33    0.453   145.62
2014.33    0.464   145.84
2015.33    0.475   146.06
2016.33    0.485   146.27
2017.33    0.494   146.47
2018.33    0.502   146.66
2019.33    0.509   146.85
2020.33    0.515   147.03
2021.33    0.520   147.21
2022.33    0.525   147.38
2023.33    0.529   147.55
2024.33    0.532   147.72
2025.33    0.535   147.89
2026.33    0.537   148.06
2027.33    0.539   148.22
2028.33    0.539   148.39
2029.33    0.539   148.55
2030.33    0.539   148.72
2031.33    0.538   148.88
2032.33    0.537   149.05
2033.33    0.535   149.21
2034.33    0.532   149.38
2035.33    0.529   149.55
2036.33    0.526   149.72
2037.33    0.522   149.90
2038.33    0.517   150.07
2039.33    0.513   150.25
2040.33    0.507   150.44
2041.33    0.501   150.62
2042.33    0.495   150.82
2043.33    0.489   151.01
2044.33    0.482   151.22
2045.33    0.474   151.43
2046.33    0.467   151.64
2047.33    0.458   151.86
2048.33    0.450   152.10
2049.33    0.441   152.34
2050.33    0.432   152.59
2051.33    0.422   152.85
2052.33    0.412   153.13
2053.33    0.402   153.41
2054.33    0.391   153.72
2055.33    0.380   154.04
2056.33    0.369   154.38
2057.33    0.357   154.74
2058.33    0.345   155.13
2059.33    0.333   155.55
2060.33    0.320   156.00
2061.33    0.307   156.48
2062.33    0.294   157.01
2063.33    0.280   157.59
2064.33    0.267   158.23
2065.33    0.253   158.94
2066.33    0.238   159.74
2067.33    0.224   160.63
2068.33    0.209   161.65
2069.33    0.194   162.83
2070.33    0.179   164.21
2071.33    0.164   165.83
2072.33    0.149   167.80
2073.33    0.133   170.21
2074.33    0.118   173.25
2075.33    0.103   177.18
2076.33    0.088   182.42
2077.33    0.075   189.66






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 17:23:57



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