Double Star Calculator - Orbit

Orbital Elements for STT217

WDS:	STT217	WDS ID/Discoverer
P:	139.789	Orbital period (years)
a:	0.47	Semi-major axis (arcseconds)
i:	47.3	Inclination (degrees)
Ω:	121.2	Longitude of ascending node (degrees)
T:	1966.983	Epoch of periastron passage (year)
e:	0.984	Eccentricity
ω:	219.9	Longitude of periastron (degrees)
Start-Year:	1955.1055000000001	Year
End-Year:	2094.8945	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT217
Position:	102653.01+171309.9	Epoch-2000 right ascension and declination
WDS-ID:	10269+1713	WDS designation
Discoverer Code:	STT217	Discover designation and components
ADS number:	7775	Aitken Double Star catalog
HD number:	90444	HD catalog number
Hipparcos number:	51145	Hipparcos catalog number
V1:	7.85	Magnitude of the primary
V2:	8.58	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	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:	Sca2015b	Reference

Double Star Orbit for STT217

WDS 6th Orbit including measures of STT217

-- 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 STT217

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.817   149.70
--------------------------
1955.11    0.366   160.88
1956.11    0.346   161.42
1957.11    0.325   162.03
1958.11    0.304   162.73
1959.11    0.281   163.53
1960.11    0.257   164.48
1961.11    0.231   165.64
1962.11    0.203   167.11
1963.11    0.173   169.06
1964.11    0.140   171.89
1965.11    0.102   176.64
1966.11    0.058   188.05
1967.11    0.017    94.30
1968.11    0.096   127.42
1969.11    0.146   132.24
1970.11    0.187   134.74
1971.11    0.222   136.39
1972.11    0.254   137.61
1973.11    0.283   138.56
1974.11    0.310   139.35
1975.11    0.334   140.01
1976.11    0.358   140.58
1977.11    0.380   141.09
1978.11    0.401   141.54
1979.11    0.420   141.95
1980.11    0.439   142.32
1981.11    0.457   142.66
1982.11    0.474   142.98
1983.11    0.491   143.28
1984.11    0.506   143.55
1985.11    0.521   143.81
1986.11    0.536   144.06
1987.11    0.550   144.29
1988.11    0.563   144.51
1989.11    0.576   144.73
1990.11    0.589   144.93
1991.11    0.601   145.12
1992.11    0.612   145.31
1993.11    0.623   145.49
1994.11    0.634   145.66
1995.11    0.644   145.83
1996.11    0.654   146.00
1997.11    0.664   146.15
1998.11    0.673   146.31
1999.11    0.682   146.46
2000.11    0.691   146.60
2001.11    0.699   146.75
2002.11    0.707   146.88
2003.11    0.714   147.02
2004.11    0.722   147.15
2005.11    0.729   147.28
2006.11    0.735   147.41
2007.11    0.742   147.54
2008.11    0.748   147.66
2009.11    0.754   147.78
2010.11    0.759   147.91
2011.11    0.765   148.02
2012.11    0.770   148.14
2013.11    0.775   148.26
2014.11    0.779   148.37
2015.11    0.784   148.48
2016.11    0.788   148.59
2017.11    0.792   148.70
2018.11    0.795   148.81
2019.11    0.799   148.92
2020.11    0.802   149.03
2021.11    0.805   149.13
2022.11    0.808   149.24
2023.11    0.810   149.35
2024.11    0.812   149.45
2025.11    0.814   149.55
2026.11    0.816   149.66
2027.11    0.818   149.76
2028.11    0.819   149.86
2029.11    0.820   149.96
2030.11    0.821   150.07
2031.11    0.822   150.17
2032.11    0.823   150.27
2033.11    0.823   150.37
2034.11    0.823   150.47
2035.11    0.823   150.57
2036.11    0.823   150.68
2037.11    0.822   150.78
2038.11    0.822   150.88
2039.11    0.821   150.98
2040.11    0.819   151.08
2041.11    0.818   151.19
2042.11    0.817   151.29
2043.11    0.815   151.39
2044.11    0.813   151.50
2045.11    0.811   151.60
2046.11    0.808   151.71
2047.11    0.806   151.81
2048.11    0.803   151.92
2049.11    0.800   152.02
2050.11    0.796   152.13
2051.11    0.793   152.24
2052.11    0.789   152.35
2053.11    0.785   152.46
2054.11    0.781   152.57
2055.11    0.777   152.69
2056.11    0.772   152.80
2057.11    0.767   152.92
2058.11    0.762   153.04
2059.11    0.757   153.15
2060.11    0.751   153.28
2061.11    0.746   153.40
2062.11    0.740   153.52
2063.11    0.733   153.65
2064.11    0.727   153.78
2065.11    0.720   153.91
2066.11    0.713   154.04
2067.11    0.706   154.18
2068.11    0.698   154.32
2069.11    0.690   154.46
2070.11    0.682   154.61
2071.11    0.674   154.76
2072.11    0.665   154.91
2073.11    0.656   155.07
2074.11    0.647   155.23
2075.11    0.638   155.40
2076.11    0.628   155.57
2077.11    0.618   155.75
2078.11    0.607   155.93
2079.11    0.596   156.12
2080.11    0.585   156.32
2081.11    0.573   156.52
2082.11    0.561   156.73
2083.11    0.549   156.96
2084.11    0.536   157.19
2085.11    0.523   157.44
2086.11    0.509   157.69
2087.11    0.495   157.97
2088.11    0.481   158.25
2089.11    0.466   158.56
2090.11    0.450   158.89
2091.11    0.434   159.24
2092.11    0.417   159.62
2093.11    0.399   160.04
2094.11    0.381   160.49

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 16:27:50