Double Star Calculator - Orbit

Orbital Elements for STT121

WDS:	STT121	WDS ID/Discoverer
P:	180.180	Orbital period (years)
a:	0.423	Semi-major axis (arcseconds)
i:	117.9	Inclination (degrees)
Ω:	148.6	Longitude of ascending node (degrees)
T:	1952.420	Epoch of periastron passage (year)
e:	0.779	Eccentricity
ω:	118.8	Longitude of periastron (degrees)
Start-Year:	1934.91	Year
End-Year:	2115.09	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT121
Position:	060515.99+735958.9	Epoch-2000 right ascension and declination
WDS-ID:	06053+7400	WDS designation
Discoverer Code:	STT121	Discover designation and components
ADS number:	4603	Aitken Double Star catalog
HD number:	40225	HD catalog number
Hipparcos number:	28842	Hipparcos catalog number
V1:	7.96	Magnitude of the primary
V2:	8.81	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	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:	Doc1995b	Reference

Double Star Orbit for STT121

WDS 6th Orbit including measures of STT121

-- 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 STT121

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.424   197.27
--------------------------
1934.91    0.350   155.61
1935.91    0.338   154.72
1936.91    0.327   153.78
1937.91    0.314   152.76
1938.91    0.301   151.65
1939.91    0.287   150.43
1940.91    0.272   149.08
1941.91    0.255   147.57
1942.91    0.238   145.84
1943.91    0.219   143.83
1944.91    0.199   141.42
1945.91    0.177   138.44
1946.91    0.153   134.55
1947.91    0.127   129.13
1948.91    0.099   120.76
1949.91    0.071   105.74
1950.91    0.049    74.61
1951.91    0.050    27.41
1952.91    0.071   356.66
1953.91    0.095   341.01
1954.91    0.115   331.40
1955.91    0.130   324.42
1956.91    0.142   318.77
1957.91    0.151   313.89
1958.91    0.158   309.50
1959.91    0.164   305.44
1960.91    0.168   301.63
1961.91    0.172   298.00
1962.91    0.175   294.52
1963.91    0.178   291.16
1964.91    0.181   287.90
1965.91    0.183   284.74
1966.91    0.186   281.66
1967.91    0.188   278.67
1968.91    0.191   275.75
1969.91    0.193   272.91
1970.91    0.196   270.15
1971.91    0.199   267.46
1972.91    0.202   264.84
1973.91    0.205   262.30
1974.91    0.208   259.83
1975.91    0.211   257.44
1976.91    0.214   255.11
1977.91    0.218   252.86
1978.91    0.221   250.68
1979.91    0.225   248.57
1980.91    0.228   246.53
1981.91    0.232   244.55
1982.91    0.236   242.64
1983.91    0.240   240.79
1984.91    0.244   239.00
1985.91    0.248   237.27
1986.91    0.253   235.60
1987.91    0.257   233.98
1988.91    0.261   232.42
1989.91    0.266   230.91
1990.91    0.270   229.45
1991.91    0.274   228.03
1992.91    0.279   226.66
1993.91    0.283   225.34
1994.91    0.288   224.05
1995.91    0.293   222.81
1996.91    0.297   221.60
1997.91    0.302   220.43
1998.91    0.306   219.30
1999.91    0.311   218.19
2000.91    0.315   217.12
2001.91    0.320   216.09
2002.91    0.325   215.08
2003.91    0.329   214.09
2004.91    0.334   213.14
2005.91    0.338   212.21
2006.91    0.343   211.31
2007.91    0.347   210.42
2008.91    0.352   209.57
2009.91    0.356   208.73
2010.91    0.361   207.91
2011.91    0.365   207.11
2012.91    0.369   206.34
2013.91    0.374   205.58
2014.91    0.378   204.83
2015.91    0.382   204.11
2016.91    0.386   203.40
2017.91    0.390   202.70
2018.91    0.395   202.02
2019.91    0.399   201.35
2020.91    0.403   200.70
2021.91    0.407   200.06
2022.91    0.411   199.43
2023.91    0.414   198.81
2024.91    0.418   198.21
2025.91    0.422   197.61
2026.91    0.426   197.03
2027.91    0.429   196.46
2028.91    0.433   195.89
2029.91    0.437   195.34
2030.91    0.440   194.79
2031.91    0.444   194.25
2032.91    0.447   193.73
2033.91    0.450   193.20
2034.91    0.453   192.69
2035.91    0.457   192.18
2036.91    0.460   191.68
2037.91    0.463   191.19
2038.91    0.466   190.71
2039.91    0.469   190.22
2040.91    0.472   189.75
2041.91    0.474   189.28
2042.91    0.477   188.82
2043.91    0.480   188.36
2044.91    0.482   187.91
2045.91    0.485   187.46
2046.91    0.487   187.01
2047.91    0.490   186.57
2048.91    0.492   186.14
2049.91    0.494   185.71
2050.91    0.496   185.28
2051.91    0.498   184.86
2052.91    0.500   184.43
2053.91    0.502   184.02
2054.91    0.504   183.60
2055.91    0.505   183.19
2056.91    0.507   182.78
2057.91    0.509   182.37
2058.91    0.510   181.97
2059.91    0.511   181.57
2060.91    0.513   181.17
2061.91    0.514   180.77
2062.91    0.515   180.37
2063.91    0.516   179.98
2064.91    0.516   179.58
2065.91    0.517   179.19
2066.91    0.518   178.80
2067.91    0.518   178.41
2068.91    0.519   178.02
2069.91    0.519   177.63
2070.91    0.519   177.24
2071.91    0.519   176.85
2072.91    0.519   176.46
2073.91    0.519   176.07
2074.91    0.519   175.68
2075.91    0.518   175.29
2076.91    0.518   174.90
2077.91    0.517   174.51
2078.91    0.516   174.12
2079.91    0.515   173.72
2080.91    0.514   173.33
2081.91    0.513   172.93
2082.91    0.512   172.53
2083.91    0.510   172.13
2084.91    0.509   171.73
2085.91    0.507   171.32
2086.91    0.505   170.91
2087.91    0.503   170.50
2088.91    0.500   170.08
2089.91    0.498   169.66
2090.91    0.495   169.23
2091.91    0.492   168.80
2092.91    0.489   168.37
2093.91    0.486   167.92
2094.91    0.482   167.48
2095.91    0.479   167.02
2096.91    0.475   166.56
2097.91    0.470   166.09
2098.91    0.466   165.61
2099.91    0.461   165.13
2100.91    0.456   164.63
2101.91    0.451   164.12
2102.91    0.446   163.60
2103.91    0.440   163.06
2104.91    0.434   162.51
2105.91    0.428   161.95
2106.91    0.421   161.36
2107.91    0.414   160.76
2108.91    0.406   160.14
2109.91    0.398   159.49
2110.91    0.390   158.81
2111.91    0.381   158.11
2112.91    0.372   157.37
2113.91    0.362   156.59
2114.91    0.352   155.76

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 15:44:02