Double Star Calculator - Orbit

Orbital Elements for B1909

WDS:	B1909	WDS ID/Discoverer
P:	11.350	Orbital period (years)
a:	0.202	Semi-major axis (arcseconds)
i:	69.8	Inclination (degrees)
Ω:	119.49	Longitude of ascending node (degrees)
T:	1995.090	Epoch of periastron passage (year)
e:	0.005	Eccentricity
ω:	99.0	Longitude of periastron (degrees)
Start-Year:	2019.325	Year
End-Year:	2030.675	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B1909
Position:	002821.17-202005.2	Epoch-2000 right ascension and declination
WDS-ID:	00284-2020	WDS designation
Discoverer Code:	B1909	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	2475	HD catalog number
Hipparcos number:	2237	Hipparcos catalog number
V1:	7.23	Magnitude of the primary
V2:	7.40	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	1	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 B1909

WDS 6th Orbit including measures of B1909

-- 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 B1909

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.196   124.66
--------------------------
2019.33    0.175   287.37
2019.42    0.180   288.79
2019.52    0.184   290.14
2019.62    0.188   291.43
2019.72    0.192   292.66
2019.82    0.195   293.86
2019.92    0.197   295.02
2020.02    0.199   296.16
2020.12    0.201   297.28
2020.22    0.202   298.38
2020.32    0.202   299.48
2020.42    0.202   300.58
2020.52    0.201   301.68
2020.62    0.200   302.79
2020.72    0.198   303.93
2020.82    0.195   305.08
2020.92    0.193   306.27
2021.02    0.189   307.50
2021.12    0.185   308.77
2021.22    0.181   310.11
2021.32    0.176   311.51
2021.42    0.171   312.99
2021.52    0.165   314.57
2021.62    0.159   316.27
2021.72    0.153   318.10
2021.82    0.146   320.09
2021.92    0.140   322.28
2022.02    0.133   324.69
2022.12    0.125   327.38
2022.22    0.118   330.40
2022.32    0.111   333.82
2022.42    0.104   337.71
2022.52    0.097   342.17
2022.62    0.090   347.29
2022.72    0.084   353.17
2022.82    0.079   359.88
2022.92    0.075     7.44
2023.02    0.072    15.77
2023.12    0.070    24.64
2023.22    0.070    33.72
2023.32    0.072    42.62
2023.42    0.075    50.99
2023.52    0.079    58.60
2023.62    0.084    65.37
2023.72    0.090    71.30
2023.82    0.096    76.47
2023.92    0.103    80.96
2024.02    0.110    84.89
2024.12    0.118    88.33
2024.22    0.125    91.37
2024.32    0.132    94.08
2024.42    0.139    96.51
2024.52    0.146    98.71
2024.62    0.153   100.72
2024.72    0.159   102.56
2024.82    0.165   104.26
2024.92    0.171   105.85
2025.02    0.176   107.34
2025.12    0.181   108.74
2025.22    0.185   110.08
2025.32    0.189   111.35
2025.42    0.192   112.58
2025.52    0.195   113.77
2025.62    0.198   114.92
2025.72    0.200   116.06
2025.82    0.201   117.17
2025.92    0.202   118.27
2026.02    0.202   119.36
2026.12    0.202   120.46
2026.22    0.201   121.56
2026.32    0.200   122.67
2026.42    0.198   123.80
2026.52    0.195   124.96
2026.62    0.193   126.14
2026.72    0.189   127.37
2026.82    0.185   128.65
2026.92    0.181   129.98
2027.02    0.176   131.39
2027.12    0.171   132.88
2027.22    0.165   134.46
2027.32    0.159   136.17
2027.42    0.152   138.01
2027.52    0.146   140.02
2027.62    0.139   142.23
2027.72    0.132   144.68
2027.82    0.124   147.41
2027.92    0.117   150.48
2028.02    0.110   153.96
2028.12    0.102   157.94
2028.22    0.095   162.52
2028.32    0.089   167.79
2028.42    0.083   173.86
2028.52    0.078   180.80
2028.62    0.074   188.63
2028.72    0.071   197.22
2028.82    0.069   206.33
2028.92    0.070   215.59
2029.02    0.072   224.57
2029.12    0.075   232.94
2029.22    0.079   240.49
2029.32    0.085   247.16
2029.42    0.091   252.97
2029.52    0.098   258.01
2029.62    0.105   262.39
2029.72    0.112   266.20
2029.82    0.119   269.55
2029.92    0.127   272.50
2030.02    0.134   275.14
2030.12    0.141   277.51
2030.22    0.148   279.65
2030.32    0.154   281.60
2030.42    0.161   283.40
2030.52    0.167   285.07
2030.62    0.172   286.63

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 14:39:45