Double Star Calculator - Orbit

Orbital Elements for HEL5BA,BB

WDS:	HEL5BA,BB	WDS ID/Discoverer
P:	20.960	Orbital period (years)
a:	0.318	Semi-major axis (arcseconds)
i:	160.4	Inclination (degrees)
Ω:	245.27	Longitude of ascending node (degrees)
T:	2002.188	Epoch of periastron passage (year)
e:	0.3781	Eccentricity
ω:	350.22	Longitude of periastron (degrees)
Start-Year:	2014.52	Year
End-Year:	2035.48	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HEL5BA,BB
Position:	021254.96+404007.0	Epoch-2000 right ascension and declination
WDS-ID:	02132+4030	WDS designation
Discoverer Code:	HEL5BA,BB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	13507	HD catalog number
Hipparcos number:	10321	Hipparcos catalog number
V1:	5.6	Magnitude of the primary
V2:	9.4	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Hel2016	Reference

Double Star Orbit for HEL5BA,BB

WDS 6th Orbit including measures of HEL5BA,BB

-- 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 HEL5BA,BB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.278   153.48
--------------------------
2014.52    0.428    59.65
2014.62    0.427    58.82
2014.72    0.426    57.99
2014.82    0.425    57.15
2014.92    0.423    56.31
2015.02    0.422    55.46
2015.12    0.420    54.61
2015.22    0.419    53.75
2015.32    0.417    52.88
2015.42    0.415    52.00
2015.52    0.413    51.12
2015.62    0.412    50.23
2015.72    0.410    49.33
2015.82    0.408    48.43
2015.92    0.406    47.51
2016.02    0.404    46.58
2016.12    0.401    45.65
2016.22    0.399    44.70
2016.32    0.397    43.75
2016.42    0.394    42.78
2016.52    0.392    41.80
2016.62    0.389    40.81
2016.72    0.387    39.80
2016.82    0.384    38.78
2016.92    0.381    37.75
2017.02    0.379    36.70
2017.12    0.376    35.63
2017.22    0.373    34.55
2017.32    0.370    33.46
2017.42    0.367    32.34
2017.52    0.364    31.20
2017.62    0.361    30.05
2017.72    0.357    28.87
2017.82    0.354    27.68
2017.92    0.351    26.46
2018.02    0.347    25.21
2018.12    0.344    23.95
2018.22    0.340    22.65
2018.32    0.337    21.33
2018.42    0.333    19.98
2018.52    0.330    18.60
2018.62    0.326    17.19
2018.72    0.322    15.75
2018.82    0.318    14.27
2018.92    0.315    12.76
2019.02    0.311    11.21
2019.12    0.307     9.62
2019.22    0.303     7.99
2019.32    0.299     6.32
2019.42    0.295     4.60
2019.52    0.291     2.84
2019.62    0.287     1.02
2019.72    0.283   359.16
2019.82    0.279   357.24
2019.92    0.275   355.26
2020.02    0.271   353.23
2020.12    0.267   351.14
2020.22    0.263   348.98
2020.32    0.259   346.76
2020.42    0.255   344.47
2020.52    0.251   342.11
2020.62    0.248   339.67
2020.72    0.244   337.17
2020.82    0.240   334.58
2020.92    0.237   331.92
2021.02    0.233   329.18
2021.12    0.230   326.35
2021.22    0.227   323.45
2021.32    0.224   320.46
2021.42    0.221   317.39
2021.52    0.218   314.24
2021.62    0.215   311.00
2021.72    0.213   307.69
2021.82    0.210   304.31
2021.92    0.208   300.85
2022.02    0.206   297.32
2022.12    0.204   293.72
2022.22    0.203   290.07
2022.32    0.201   286.37
2022.42    0.200   282.61
2022.52    0.199   278.82
2022.62    0.199   274.99
2022.72    0.198   271.13
2022.82    0.198   267.26
2022.92    0.197   263.37
2023.02    0.197   259.48
2023.12    0.197   255.58
2023.22    0.198   251.70
2023.32    0.198   247.83
2023.42    0.199   243.99
2023.52    0.200   240.17
2023.62    0.201   236.38
2023.72    0.202   232.64
2023.82    0.203   228.93
2023.92    0.204   225.28
2024.02    0.206   221.67
2024.12    0.207   218.13
2024.22    0.209   214.64
2024.32    0.211   211.21
2024.42    0.213   207.85
2024.52    0.216   204.55
2024.62    0.218   201.33
2024.72    0.220   198.17
2024.82    0.223   195.08
2024.92    0.226   192.07
2025.02    0.228   189.13
2025.12    0.231   186.26
2025.22    0.234   183.46
2025.32    0.237   180.73
2025.42    0.240   178.07
2025.52    0.244   175.48
2025.62    0.247   172.96
2025.72    0.250   170.51
2025.82    0.254   168.12
2025.92    0.257   165.80
2026.02    0.260   163.53
2026.12    0.264   161.33
2026.22    0.268   159.19
2026.32    0.271   157.10
2026.42    0.275   155.06
2026.52    0.278   153.08
2026.62    0.282   151.15
2026.72    0.286   149.27
2026.82    0.289   147.44
2026.92    0.293   145.65
2027.02    0.297   143.91
2027.12    0.300   142.21
2027.22    0.304   140.55
2027.32    0.307   138.93
2027.42    0.311   137.34
2027.52    0.315   135.79
2027.62    0.318   134.28
2027.72    0.322   132.80
2027.82    0.325   131.35
2027.92    0.329   129.93
2028.02    0.332   128.54
2028.12    0.335   127.18
2028.22    0.339   125.85
2028.32    0.342   124.54
2028.42    0.345   123.26
2028.52    0.349   122.00
2028.62    0.352   120.77
2028.72    0.355   119.55
2028.82    0.358   118.36
2028.92    0.361   117.19
2029.02    0.364   116.03
2029.12    0.367   114.90
2029.22    0.370   113.78
2029.32    0.373   112.68
2029.42    0.375   111.60
2029.52    0.378   110.53
2029.62    0.381   109.48
2029.72    0.383   108.44
2029.82    0.386   107.42
2029.92    0.388   106.41
2030.02    0.391   105.41
2030.12    0.393   104.43
2030.22    0.396   103.45
2030.32    0.398   102.49
2030.42    0.400   101.54
2030.52    0.402   100.60
2030.62    0.404    99.67
2030.72    0.406    98.75
2030.82    0.408    97.83
2030.92    0.410    96.93
2031.02    0.412    96.03
2031.12    0.414    95.14
2031.22    0.416    94.26
2031.32    0.417    93.39
2031.42    0.419    92.52
2031.52    0.420    91.66
2031.62    0.422    90.81
2031.72    0.423    89.96
2031.82    0.425    89.12
2031.92    0.426    88.28
2032.02    0.427    87.45
2032.12    0.428    86.62
2032.22    0.429    85.79
2032.32    0.430    84.97
2032.42    0.431    84.16
2032.52    0.432    83.34
2032.62    0.433    82.53
2032.72    0.434    81.73
2032.82    0.434    80.92
2032.92    0.435    80.12
2033.02    0.436    79.32
2033.12    0.436    78.52
2033.22    0.436    77.73
2033.32    0.437    76.93
2033.42    0.437    76.14
2033.52    0.437    75.35
2033.62    0.438    74.56
2033.72    0.438    73.77
2033.82    0.438    72.97
2033.92    0.438    72.18
2034.02    0.437    71.39
2034.12    0.437    70.60
2034.22    0.437    69.81
2034.32    0.437    69.02
2034.42    0.436    68.22
2034.52    0.436    67.42
2034.62    0.435    66.63
2034.72    0.435    65.83
2034.82    0.434    65.02
2034.92    0.433    64.22
2035.02    0.433    63.41
2035.12    0.432    62.60
2035.22    0.431    61.79
2035.32    0.430    60.97
2035.42    0.429    60.15

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 14:57:45