Double Star Calculator - Orbit

Orbital Elements for RST4944

WDS:	RST4944	WDS ID/Discoverer
P:	120.500	Orbital period (years)
a:	0.215	Semi-major axis (arcseconds)
i:	134.8	Inclination (degrees)
Ω:	174.4	Longitude of ascending node (degrees)
T:	2025.580	Epoch of periastron passage (year)
e:	0.64	Eccentricity
ω:	51.7	Longitude of periastron (degrees)
Start-Year:	1964.75	Year
End-Year:	2085.25	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST4944
Position:	112753.73-014159.8	Epoch-2000 right ascension and declination
WDS-ID:	11279-0142	WDS designation
Discoverer Code:	RST4944	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	99651	HD catalog number
Hipparcos number:	55941	Hipparcos catalog number
V1:	6.62	Magnitude of the primary
V2:	8.22	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2021f	Reference

Double Star Orbit for RST4944

WDS 6th Orbit including measures of RST4944

-- 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 RST4944

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.059   114.44
--------------------------
1964.75    0.294   313.16
1965.75    0.292   312.29
1966.75    0.291   311.41
1967.75    0.289   310.52
1968.75    0.287   309.62
1969.75    0.285   308.70
1970.75    0.283   307.78
1971.75    0.281   306.84
1972.75    0.278   305.88
1973.75    0.276   304.91
1974.75    0.274   303.92
1975.75    0.271   302.91
1976.75    0.268   301.88
1977.75    0.266   300.83
1978.75    0.263   299.76
1979.75    0.260   298.66
1980.75    0.257   297.54
1981.75    0.254   296.39
1982.75    0.251   295.22
1983.75    0.247   294.01
1984.75    0.244   292.77
1985.75    0.241   291.50
1986.75    0.237   290.18
1987.75    0.233   288.83
1988.75    0.230   287.44
1989.75    0.226   286.00
1990.75    0.222   284.52
1991.75    0.219   282.98
1992.75    0.215   281.39
1993.75    0.211   279.74
1994.75    0.207   278.03
1995.75    0.203   276.25
1996.75    0.199   274.40
1997.75    0.195   272.48
1998.75    0.191   270.47
1999.75    0.187   268.38
2000.75    0.183   266.19
2001.75    0.179   263.91
2002.75    0.175   261.51
2003.75    0.171   259.01
2004.75    0.167   256.38
2005.75    0.163   253.62
2006.75    0.159   250.72
2007.75    0.155   247.67
2008.75    0.151   244.47
2009.75    0.147   241.09
2010.75    0.143   237.53
2011.75    0.139   233.77
2012.75    0.135   229.80
2013.75    0.132   225.61
2014.75    0.128   221.17
2015.75    0.124   216.45
2016.75    0.120   211.44
2017.75    0.116   206.07
2018.75    0.112   200.29
2019.75    0.107   194.01
2020.75    0.101   187.09
2021.75    0.095   179.32
2022.75    0.088   170.34
2023.75    0.079   159.62
2024.75    0.071   146.33
2025.75    0.063   129.53
2026.75    0.059   109.05
2027.75    0.059    87.07
2028.75    0.065    67.34
2029.75    0.075    51.83
2030.75    0.086    40.23
2031.75    0.099    31.48
2032.75    0.111    24.70
2033.75    0.124    19.28
2034.75    0.135    14.82
2035.75    0.147    11.06
2036.75    0.157     7.83
2037.75    0.167     4.99
2038.75    0.177     2.47
2039.75    0.186     0.20
2040.75    0.194   358.13
2041.75    0.202   356.23
2042.75    0.210   354.48
2043.75    0.217   352.84
2044.75    0.224   351.30
2045.75    0.230   349.85
2046.75    0.236   348.48
2047.75    0.242   347.17
2048.75    0.247   345.92
2049.75    0.252   344.72
2050.75    0.257   343.57
2051.75    0.261   342.45
2052.75    0.265   341.37
2053.75    0.269   340.33
2054.75    0.273   339.31
2055.75    0.276   338.32
2056.75    0.279   337.35
2057.75    0.282   336.40
2058.75    0.285   335.47
2059.75    0.287   334.56
2060.75    0.290   333.66
2061.75    0.292   332.77
2062.75    0.294   331.90
2063.75    0.295   331.04
2064.75    0.297   330.18
2065.75    0.298   329.34
2066.75    0.299   328.50
2067.75    0.300   327.67
2068.75    0.301   326.84
2069.75    0.302   326.02
2070.75    0.302   325.20
2071.75    0.302   324.38
2072.75    0.303   323.56
2073.75    0.303   322.74
2074.75    0.303   321.93
2075.75    0.302   321.11
2076.75    0.302   320.29
2077.75    0.302   319.47
2078.75    0.301   318.65
2079.75    0.300   317.82
2080.75    0.299   316.99
2081.75    0.298   316.15
2082.75    0.297   315.30
2083.75    0.296   314.45
2084.75    0.294   313.60

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 16:38:47