Double Star Calculator - Orbit

Orbital Elements for RST3320

WDS:	RST3320	WDS ID/Discoverer
P:	108.400	Orbital period (years)
a:	0.282	Semi-major axis (arcseconds)
i:	162.4	Inclination (degrees)
Ω:	156.0	Longitude of ascending node (degrees)
T:	2001.940	Epoch of periastron passage (year)
e:	0.463	Eccentricity
ω:	314.0	Longitude of periastron (degrees)
Start-Year:	1970.8	Year
End-Year:	2079.2	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3320
Position:	230954.88-222727.3	Epoch-2000 right ascension and declination
WDS-ID:	23099-2227	WDS designation
Discoverer Code:	RST3320	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	218640	HD catalog number
Hipparcos number:	114375	Hipparcos catalog number
V1:	5.27	Magnitude of the primary
V2:	6.04	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	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:	Hrt2010a	Reference

Double Star Orbit for RST3320

WDS 6th Orbit including measures of RST3320

-- 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 RST3320

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.305    70.55
--------------------------
1970.80    0.357   346.57
1971.80    0.352   344.79
1972.80    0.347   342.96
1973.80    0.341   341.07
1974.80    0.336   339.12
1975.80    0.330   337.11
1976.80    0.324   335.02
1977.80    0.317   332.85
1978.80    0.311   330.58
1979.80    0.304   328.22
1980.80    0.296   325.74
1981.80    0.289   323.14
1982.80    0.281   320.39
1983.80    0.273   317.48
1984.80    0.265   314.40
1985.80    0.256   311.12
1986.80    0.248   307.60
1987.80    0.239   303.83
1988.80    0.230   299.76
1989.80    0.221   295.36
1990.80    0.211   290.57
1991.80    0.202   285.34
1992.80    0.193   279.63
1993.80    0.184   273.36
1994.80    0.176   266.49
1995.80    0.168   258.96
1996.80    0.162   250.76
1997.80    0.156   241.90
1998.80    0.152   232.45
1999.80    0.149   222.53
2000.80    0.147   212.33
2001.80    0.148   202.06
2002.80    0.149   191.93
2003.80    0.153   182.13
2004.80    0.157   172.79
2005.80    0.162   163.99
2006.80    0.168   155.78
2007.80    0.174   148.14
2008.80    0.181   141.06
2009.80    0.188   134.50
2010.80    0.195   128.43
2011.80    0.203   122.80
2012.80    0.210   117.56
2013.80    0.218   112.68
2014.80    0.225   108.13
2015.80    0.233   103.87
2016.80    0.240    99.87
2017.80    0.247    96.11
2018.80    0.254    92.57
2019.80    0.261    89.21
2020.80    0.268    86.03
2021.80    0.275    83.01
2022.80    0.282    80.14
2023.80    0.288    77.39
2024.80    0.295    74.77
2025.80    0.301    72.25
2026.80    0.307    69.84
2027.80    0.313    67.51
2028.80    0.318    65.27
2029.80    0.324    63.11
2030.80    0.329    61.02
2031.80    0.334    58.99
2032.80    0.339    57.03
2033.80    0.344    55.12
2034.80    0.349    53.26
2035.80    0.353    51.45
2036.80    0.358    49.69
2037.80    0.362    47.96
2038.80    0.365    46.27
2039.80    0.369    44.62
2040.80    0.373    43.00
2041.80    0.376    41.41
2042.80    0.379    39.84
2043.80    0.382    38.30
2044.80    0.385    36.78
2045.80    0.387    35.29
2046.80    0.390    33.81
2047.80    0.392    32.35
2048.80    0.394    30.90
2049.80    0.396    29.47
2050.80    0.397    28.06
2051.80    0.399    26.65
2052.80    0.400    25.25
2053.80    0.401    23.86
2054.80    0.402    22.47
2055.80    0.403    21.09
2056.80    0.403    19.72
2057.80    0.403    18.35
2058.80    0.403    16.97
2059.80    0.403    15.60
2060.80    0.403    14.23
2061.80    0.402    12.85
2062.80    0.401    11.46
2063.80    0.400    10.08
2064.80    0.399     8.68
2065.80    0.398     7.27
2066.80    0.396     5.86
2067.80    0.394     4.43
2068.80    0.392     2.98
2069.80    0.390     1.52
2070.80    0.387     0.04
2071.80    0.384   358.54
2072.80    0.381   357.02
2073.80    0.378   355.47
2074.80    0.375   353.90
2075.80    0.371   352.29
2076.80    0.367   350.66
2077.80    0.363   348.98
2078.80    0.358   347.26

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 18:48:13