Double Star Calculator - Orbit

Orbital Elements for STF2729AB

WDS:	STF2729AB	WDS ID/Discoverer
P:	200.700	Orbital period (years)
a:	0.816	Semi-major axis (arcseconds)
i:	64.06	Inclination (degrees)
Ω:	174.31	Longitude of ascending node (degrees)
T:	1896.800	Epoch of periastron passage (year)
e:	0.535	Eccentricity
ω:	45.9	Longitude of periastron (degrees)
Start-Year:	1924.65	Year
End-Year:	2125.35	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2729AB
Position:	205125.69-053735.9	Epoch-2000 right ascension and declination
WDS-ID:	20514-0538	WDS designation
Discoverer Code:	STF2729AB	Discover designation and components
ADS number:	14360	Aitken Double Star catalog
HD number:	198571	HD catalog number
Hipparcos number:	102945	Hipparcos catalog number
V1:	6.40	Magnitude of the primary
V2:	7.43	Magnitude of the secondary
Equinox:	2000	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:	Mdz2017	Reference

Double Star Orbit for STF2729AB

WDS 6th Orbit including measures of STF2729AB

-- 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 STF2729AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.673    38.29
--------------------------
1924.65    0.704   345.03
1925.65    0.724   345.90
1926.65    0.744   346.72
1927.65    0.763   347.50
1928.65    0.781   348.24
1929.65    0.798   348.95
1930.65    0.815   349.62
1931.65    0.831   350.28
1932.65    0.847   350.90
1933.65    0.861   351.51
1934.65    0.876   352.09
1935.65    0.889   352.66
1936.65    0.902   353.21
1937.65    0.915   353.74
1938.65    0.927   354.26
1939.65    0.938   354.77
1940.65    0.949   355.27
1941.65    0.959   355.75
1942.65    0.969   356.23
1943.65    0.979   356.69
1944.65    0.988   357.15
1945.65    0.996   357.60
1946.65    1.004   358.04
1947.65    1.011   358.47
1948.65    1.018   358.90
1949.65    1.025   359.33
1950.65    1.031   359.74
1951.65    1.037     0.16
1952.65    1.042     0.57
1953.65    1.047     0.97
1954.65    1.051     1.37
1955.65    1.055     1.77
1956.65    1.059     2.16
1957.65    1.063     2.56
1958.65    1.066     2.95
1959.65    1.068     3.33
1960.65    1.071     3.72
1961.65    1.072     4.10
1962.65    1.074     4.49
1963.65    1.075     4.87
1964.65    1.076     5.25
1965.65    1.077     5.63
1966.65    1.077     6.01
1967.65    1.077     6.39
1968.65    1.077     6.77
1969.65    1.076     7.15
1970.65    1.075     7.53
1971.65    1.074     7.92
1972.65    1.072     8.30
1973.65    1.071     8.68
1974.65    1.069     9.07
1975.65    1.066     9.46
1976.65    1.064     9.85
1977.65    1.061    10.24
1978.65    1.058    10.63
1979.65    1.054    11.03
1980.65    1.050    11.43
1981.65    1.047    11.83
1982.65    1.042    12.23
1983.65    1.038    12.64
1984.65    1.033    13.05
1985.65    1.028    13.47
1986.65    1.023    13.89
1987.65    1.018    14.31
1988.65    1.012    14.74
1989.65    1.007    15.17
1990.65    1.001    15.61
1991.65    0.994    16.05
1992.65    0.988    16.50
1993.65    0.981    16.96
1994.65    0.974    17.42
1995.65    0.967    17.89
1996.65    0.960    18.36
1997.65    0.953    18.85
1998.65    0.945    19.34
1999.65    0.937    19.83
2000.65    0.929    20.34
2001.65    0.921    20.86
2002.65    0.913    21.38
2003.65    0.904    21.92
2004.65    0.895    22.46
2005.65    0.887    23.02
2006.65    0.878    23.59
2007.65    0.868    24.17
2008.65    0.859    24.76
2009.65    0.850    25.36
2010.65    0.840    25.98
2011.65    0.830    26.61
2012.65    0.820    27.26
2013.65    0.810    27.92
2014.65    0.800    28.61
2015.65    0.790    29.30
2016.65    0.780    30.02
2017.65    0.769    30.76
2018.65    0.759    31.51
2019.65    0.748    32.29
2020.65    0.737    33.09
2021.65    0.726    33.91
2022.65    0.716    34.76
2023.65    0.705    35.64
2024.65    0.694    36.54
2025.65    0.683    37.47
2026.65    0.672    38.44
2027.65    0.660    39.43
2028.65    0.649    40.46
2029.65    0.638    41.53
2030.65    0.627    42.63
2031.65    0.616    43.77
2032.65    0.605    44.96
2033.65    0.594    46.18
2034.65    0.583    47.46
2035.65    0.572    48.78
2036.65    0.561    50.16
2037.65    0.551    51.58
2038.65    0.540    53.07
2039.65    0.530    54.61
2040.65    0.520    56.21
2041.65    0.510    57.88
2042.65    0.500    59.61
2043.65    0.490    61.41
2044.65    0.481    63.28
2045.65    0.472    65.23
2046.65    0.464    67.24
2047.65    0.455    69.33
2048.65    0.448    71.50
2049.65    0.440    73.74
2050.65    0.433    76.05
2051.65    0.427    78.44
2052.65    0.421    80.90
2053.65    0.415    83.42
2054.65    0.411    86.01
2055.65    0.406    88.65
2056.65    0.403    91.35
2057.65    0.400    94.09
2058.65    0.397    96.87
2059.65    0.396    99.68
2060.65    0.395   102.51
2061.65    0.394   105.35
2062.65    0.394   108.19
2063.65    0.395   111.02
2064.65    0.397   113.84
2065.65    0.399   116.63
2066.65    0.401   119.39
2067.65    0.404   122.12
2068.65    0.407   124.80
2069.65    0.411   127.43
2070.65    0.415   130.02
2071.65    0.420   132.55
2072.65    0.424   135.03
2073.65    0.429   137.46
2074.65    0.433   139.84
2075.65    0.438   142.16
2076.65    0.442   144.44
2077.65    0.447   146.68
2078.65    0.450   148.87
2079.65    0.454   151.03
2080.65    0.457   153.16
2081.65    0.459   155.26
2082.65    0.460   157.35
2083.65    0.460   159.44
2084.65    0.460   161.52
2085.65    0.457   163.62
2086.65    0.454   165.75
2087.65    0.449   167.91
2088.65    0.442   170.14
2089.65    0.433   172.44
2090.65    0.422   174.86
2091.65    0.409   177.42
2092.65    0.393   180.16
2093.65    0.375   183.15
2094.65    0.356   186.46
2095.65    0.334   190.17
2096.65    0.310   194.43
2097.65    0.286   199.40
2098.65    0.261   205.31
2099.65    0.238   212.42
2100.65    0.216   221.03
2101.65    0.199   231.35
2102.65    0.187   243.32
2103.65    0.183   256.35
2104.65    0.187   269.40
2105.65    0.198   281.39
2106.65    0.217   291.71
2107.65    0.239   300.25
2108.65    0.265   307.22
2109.65    0.293   312.91
2110.65    0.322   317.60
2111.65    0.351   321.51
2112.65    0.380   324.82
2113.65    0.410   327.65
2114.65    0.438   330.11
2115.65    0.467   332.26
2116.65    0.494   334.17
2117.65    0.521   335.89
2118.65    0.548   337.43
2119.65    0.573   338.84
2120.65    0.598   340.12
2121.65    0.622   341.31
2122.65    0.645   342.41
2123.65    0.667   343.44
2124.65    0.689   344.40

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 18:19:19