Double Star Calculator - Orbit

Orbital Elements for STF228

WDS:	STF228	WDS ID/Discoverer
P:	145.410	Orbital period (years)
a:	0.89	Semi-major axis (arcseconds)
i:	63.75	Inclination (degrees)
Ω:	99.07	Longitude of ascending node (degrees)
T:	1899.070	Epoch of periastron passage (year)
e:	0.2626	Eccentricity
ω:	322.66	Longitude of periastron (degrees)
Start-Year:	1952.295	Year
End-Year:	2097.705	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF228
Position:	021402.43+472903.3	Epoch-2000 right ascension and declination
WDS-ID:	02140+4729	WDS designation
Discoverer Code:	STF228	Discover designation and components
ADS number:	1709	Aitken Double Star catalog
HD number:	13594	HD catalog number
Hipparcos number:	10403	Hipparcos catalog number
V1:	6.56	Magnitude of the primary
V2:	7.21	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	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:	Pru2017	Reference

Double Star Orbit for STF228

WDS 6th Orbit including measures of STF228

-- 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 STF228

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.400   332.28
--------------------------
1952.30    0.601   232.24
1953.30    0.619   234.49
1954.30    0.638   236.61
1955.30    0.657   238.60
1956.30    0.677   240.48
1957.30    0.696   242.26
1958.30    0.715   243.94
1959.30    0.734   245.54
1960.30    0.753   247.05
1961.30    0.772   248.49
1962.30    0.790   249.86
1963.30    0.808   251.17
1964.30    0.826   252.43
1965.30    0.843   253.63
1966.30    0.860   254.78
1967.30    0.876   255.90
1968.30    0.892   256.97
1969.30    0.907   258.00
1970.30    0.922   259.00
1971.30    0.936   259.97
1972.30    0.950   260.91
1973.30    0.963   261.83
1974.30    0.975   262.72
1975.30    0.987   263.59
1976.30    0.998   264.44
1977.30    1.008   265.27
1978.30    1.017   266.09
1979.30    1.026   266.89
1980.30    1.034   267.68
1981.30    1.041   268.45
1982.30    1.047   269.22
1983.30    1.053   269.98
1984.30    1.058   270.73
1985.30    1.061   271.48
1986.30    1.064   272.22
1987.30    1.066   272.95
1988.30    1.067   273.69
1989.30    1.068   274.42
1990.30    1.067   275.16
1991.30    1.065   275.90
1992.30    1.063   276.63
1993.30    1.059   277.38
1994.30    1.054   278.13
1995.30    1.049   278.88
1996.30    1.042   279.65
1997.30    1.035   280.43
1998.30    1.026   281.21
1999.30    1.016   282.02
2000.30    1.005   282.84
2001.30    0.994   283.67
2002.30    0.981   284.53
2003.30    0.967   285.41
2004.30    0.952   286.32
2005.30    0.936   287.26
2006.30    0.919   288.24
2007.30    0.900   289.25
2008.30    0.881   290.30
2009.30    0.861   291.41
2010.30    0.839   292.57
2011.30    0.817   293.79
2012.30    0.793   295.08
2013.30    0.769   296.45
2014.30    0.744   297.91
2015.30    0.718   299.48
2016.30    0.691   301.17
2017.30    0.663   303.00
2018.30    0.635   304.98
2019.30    0.606   307.16
2020.30    0.576   309.56
2021.30    0.547   312.21
2022.30    0.517   315.17
2023.30    0.488   318.48
2024.30    0.459   322.22
2025.30    0.432   326.44
2026.30    0.405   331.23
2027.30    0.381   336.65
2028.30    0.359   342.77
2029.30    0.341   349.60
2030.30    0.327   357.11
2031.30    0.318     5.15
2032.30    0.315    13.52
2033.30    0.317    21.92
2034.30    0.325    30.07
2035.30    0.337    37.73
2036.30    0.354    44.76
2037.30    0.374    51.09
2038.30    0.397    56.74
2039.30    0.421    61.75
2040.30    0.446    66.21
2041.30    0.472    70.19
2042.30    0.497    73.76
2043.30    0.522    76.98
2044.30    0.546    79.91
2045.30    0.569    82.60
2046.30    0.591    85.09
2047.30    0.610    87.41
2048.30    0.628    89.59
2049.30    0.644    91.66
2050.30    0.658    93.64
2051.30    0.669    95.54
2052.30    0.679    97.38
2053.30    0.686    99.18
2054.30    0.691   100.94
2055.30    0.694   102.69
2056.30    0.695   104.42
2057.30    0.694   106.15
2058.30    0.691   107.90
2059.30    0.687   109.66
2060.30    0.681   111.45
2061.30    0.673   113.27
2062.30    0.664   115.14
2063.30    0.654   117.07
2064.30    0.642   119.06
2065.30    0.630   121.13
2066.30    0.617   123.28
2067.30    0.603   125.53
2068.30    0.589   127.89
2069.30    0.574   130.37
2070.30    0.559   132.98
2071.30    0.544   135.73
2072.30    0.529   138.63
2073.30    0.515   141.70
2074.30    0.501   144.94
2075.30    0.488   148.36
2076.30    0.476   151.96
2077.30    0.465   155.74
2078.30    0.456   159.69
2079.30    0.447   163.80
2080.30    0.441   168.05
2081.30    0.436   172.40
2082.30    0.433   176.83
2083.30    0.433   181.30
2084.30    0.434   185.77
2085.30    0.437   190.19
2086.30    0.442   194.52
2087.30    0.449   198.74
2088.30    0.458   202.81
2089.30    0.468   206.72
2090.30    0.480   210.44
2091.30    0.494   213.97
2092.30    0.508   217.31
2093.30    0.523   220.46
2094.30    0.540   223.42
2095.30    0.557   226.21
2096.30    0.575   228.82
2097.30    0.593   231.28

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 14:58:07