Double Star Calculator - Orbit

Orbital Elements for RST321

WDS:	RST321	WDS ID/Discoverer
P:	25.780	Orbital period (years)
a:	0.31	Semi-major axis (arcseconds)
i:	40.9	Inclination (degrees)
Ω:	128.6	Longitude of ascending node (degrees)
T:	2000.850	Epoch of periastron passage (year)
e:	0.219	Eccentricity
ω:	232.1	Longitude of periastron (degrees)
Start-Year:	2012.11	Year
End-Year:	2037.89	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST321
Position:	082504.14-490935.0	Epoch-2000 right ascension and declination
WDS-ID:	08251-4910	WDS designation
Discoverer Code:	RST321	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	71386	HD catalog number
Hipparcos number:	41261	Hipparcos catalog number
V1:	8.27	Magnitude of the primary
V2:	8.94	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	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:	Tok2015c	Reference

Double Star Orbit for RST321

WDS 6th Orbit including measures of RST321

-- 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 RST321

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.210   349.80
--------------------------
2012.11    0.344   158.32
2012.21    0.343   159.16
2012.31    0.342   160.00
2012.41    0.341   160.85
2012.51    0.340   161.70
2012.61    0.339   162.56
2012.71    0.337   163.43
2012.81    0.336   164.30
2012.91    0.335   165.18
2013.01    0.334   166.07
2013.11    0.332   166.96
2013.21    0.331   167.86
2013.31    0.330   168.77
2013.41    0.328   169.68
2013.51    0.327   170.60
2013.61    0.325   171.53
2013.71    0.324   172.47
2013.81    0.323   173.42
2013.91    0.321   174.37
2014.01    0.320   175.34
2014.11    0.318   176.31
2014.21    0.316   177.30
2014.31    0.315   178.29
2014.41    0.313   179.29
2014.51    0.312   180.31
2014.61    0.310   181.33
2014.71    0.309   182.36
2014.81    0.307   183.41
2014.91    0.306   184.46
2015.01    0.304   185.52
2015.11    0.302   186.60
2015.21    0.301   187.69
2015.31    0.299   188.79
2015.41    0.298   189.90
2015.51    0.296   191.02
2015.61    0.295   192.15
2015.71    0.293   193.29
2015.81    0.292   194.45
2015.91    0.290   195.62
2016.01    0.289   196.79
2016.11    0.288   197.99
2016.21    0.286   199.19
2016.31    0.285   200.40
2016.41    0.284   201.63
2016.51    0.282   202.86
2016.61    0.281   204.11
2016.71    0.280   205.37
2016.81    0.279   206.64
2016.91    0.277   207.92
2017.01    0.276   209.21
2017.11    0.275   210.51
2017.21    0.274   211.82
2017.31    0.273   213.14
2017.41    0.272   214.47
2017.51    0.271   215.81
2017.61    0.271   217.16
2017.71    0.270   218.51
2017.81    0.269   219.88
2017.91    0.268   221.25
2018.01    0.268   222.63
2018.11    0.267   224.01
2018.21    0.266   225.41
2018.31    0.266   226.80
2018.41    0.265   228.21
2018.51    0.265   229.61
2018.61    0.265   231.03
2018.71    0.264   232.44
2018.81    0.264   233.86
2018.91    0.264   235.28
2019.01    0.264   236.71
2019.11    0.263   238.13
2019.21    0.263   239.56
2019.31    0.263   240.99
2019.41    0.263   242.42
2019.51    0.263   243.84
2019.61    0.263   245.27
2019.71    0.263   246.70
2019.81    0.264   248.12
2019.91    0.264   249.55
2020.01    0.264   250.97
2020.11    0.264   252.39
2020.21    0.264   253.80
2020.31    0.265   255.22
2020.41    0.265   256.63
2020.51    0.265   258.03
2020.61    0.266   259.44
2020.71    0.266   260.84
2020.81    0.266   262.23
2020.91    0.267   263.62
2021.01    0.267   265.01
2021.11    0.268   266.40
2021.21    0.268   267.78
2021.31    0.268   269.15
2021.41    0.269   270.53
2021.51    0.269   271.90
2021.61    0.269   273.26
2021.71    0.270   274.63
2021.81    0.270   275.99
2021.91    0.270   277.34
2022.01    0.270   278.70
2022.11    0.270   280.05
2022.21    0.271   281.41
2022.31    0.271   282.76
2022.41    0.271   284.11
2022.51    0.271   285.46
2022.61    0.271   286.81
2022.71    0.271   288.16
2022.81    0.270   289.51
2022.91    0.270   290.87
2023.01    0.270   292.23
2023.11    0.269   293.59
2023.21    0.269   294.96
2023.31    0.268   296.33
2023.41    0.268   297.70
2023.51    0.267   299.09
2023.61    0.266   300.48
2023.71    0.265   301.88
2023.81    0.264   303.29
2023.91    0.263   304.71
2024.01    0.262   306.14
2024.11    0.261   307.59
2024.21    0.260   309.05
2024.31    0.258   310.52
2024.41    0.257   312.02
2024.51    0.255   313.53
2024.61    0.254   315.06
2024.71    0.252   316.61
2024.81    0.250   318.18
2024.91    0.248   319.78
2025.01    0.246   321.40
2025.11    0.244   323.05
2025.21    0.242   324.73
2025.31    0.239   326.44
2025.41    0.237   328.18
2025.51    0.235   329.96
2025.61    0.232   331.78
2025.71    0.230   333.63
2025.81    0.227   335.52
2025.91    0.225   337.46
2026.01    0.222   339.43
2026.11    0.220   341.46
2026.21    0.217   343.53
2026.31    0.215   345.64
2026.41    0.212   347.81
2026.51    0.210   350.03
2026.61    0.208   352.30
2026.71    0.205   354.61
2026.81    0.203   356.98
2026.91    0.201   359.40
2027.01    0.199     1.87
2027.11    0.197     4.39
2027.21    0.196     6.95
2027.31    0.194     9.55
2027.41    0.193    12.19
2027.51    0.192    14.87
2027.61    0.191    17.58
2027.71    0.190    20.31
2027.81    0.189    23.07
2027.91    0.189    25.83
2028.01    0.189    28.61
2028.11    0.189    31.38
2028.21    0.189    34.15
2028.31    0.190    36.91
2028.41    0.191    39.65
2028.51    0.192    42.36
2028.61    0.193    45.04
2028.71    0.194    47.69
2028.81    0.196    50.29
2028.91    0.198    52.85
2029.01    0.200    55.37
2029.11    0.202    57.83
2029.21    0.204    60.23
2029.31    0.206    62.58
2029.41    0.209    64.88
2029.51    0.212    67.11
2029.61    0.215    69.29
2029.71    0.218    71.41
2029.81    0.221    73.47
2029.91    0.224    75.47
2030.01    0.227    77.42
2030.11    0.230    79.31
2030.21    0.234    81.16
2030.31    0.237    82.94
2030.41    0.240    84.68
2030.51    0.244    86.37
2030.61    0.247    88.02
2030.71    0.251    89.62
2030.81    0.254    91.17
2030.91    0.257    92.69
2031.01    0.261    94.16
2031.11    0.264    95.60
2031.21    0.267    97.00
2031.31    0.271    98.37
2031.41    0.274    99.70
2031.51    0.277   101.00
2031.61    0.281   102.27
2031.71    0.284   103.52
2031.81    0.287   104.73
2031.91    0.290   105.92
2032.01    0.293   107.09
2032.11    0.296   108.23
2032.21    0.299   109.35
2032.31    0.301   110.45
2032.41    0.304   111.53
2032.51    0.307   112.59
2032.61    0.309   113.64
2032.71    0.312   114.66
2032.81    0.314   115.67
2032.91    0.317   116.66
2033.01    0.319   117.64
2033.11    0.321   118.61
2033.21    0.324   119.56
2033.31    0.326   120.50
2033.41    0.328   121.43
2033.51    0.330   122.34
2033.61    0.331   123.25
2033.71    0.333   124.15
2033.81    0.335   125.03
2033.91    0.336   125.91
2034.01    0.338   126.78
2034.11    0.339   127.64
2034.21    0.341   128.50
2034.31    0.342   129.35
2034.41    0.343   130.19
2034.51    0.345   131.03
2034.61    0.346   131.86
2034.71    0.347   132.68
2034.81    0.348   133.51
2034.91    0.348   134.32
2035.01    0.349   135.14
2035.11    0.350   135.95
2035.21    0.351   136.75
2035.31    0.351   137.56
2035.41    0.352   138.36
2035.51    0.352   139.16
2035.61    0.352   139.96
2035.71    0.353   140.75
2035.81    0.353   141.55
2035.91    0.353   142.34
2036.01    0.353   143.14
2036.11    0.353   143.93
2036.21    0.353   144.72
2036.31    0.353   145.52
2036.41    0.353   146.31
2036.51    0.353   147.11
2036.61    0.352   147.90
2036.71    0.352   148.70
2036.81    0.352   149.50
2036.91    0.351   150.30
2037.01    0.351   151.11
2037.11    0.350   151.91
2037.21    0.349   152.72
2037.31    0.349   153.53
2037.41    0.348   154.35
2037.51    0.347   155.17
2037.61    0.346   155.99
2037.71    0.346   156.82
2037.81    0.345   157.65

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 16:07:13