Double Star Calculator - Orbit

Orbital Elements for HDS1891
WDS: HDS1891 WDS ID/Discoverer
P: 12.230 Orbital period (years)
a: 0.1794 Semi-major axis (arcseconds)
i: 163.1 Inclination (degrees)
Ω: 73.6 Longitude of ascending node (degrees)
T: 2014.490 Epoch of periastron passage (year)
e: 0.185 Eccentricity
ω: 236.1 Longitude of periastron (degrees)
Start-Year: 2018.885 Year
End-Year: 2031.115 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for HDS1891
Position: 133036.43-423750.5 Epoch-2000 right ascension and declination
WDS-ID: 13306-4238 WDS designation
Discoverer Code: HDS1891 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 117383 HD catalog number
Hipparcos number: 65906 Hipparcos catalog number
V1: 10.01 Magnitude of the primary
V2: 11.09 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2024 Date of last observation
Orbit grade: 2 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2024b Reference

Double Star Orbit for HDS1891



WDS 6th Orbit including measures of HDS1891

-- 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 HDS1891
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.143   208.33
--------------------------
2018.88    0.203    54.77
2018.98    0.203    52.61
2019.08    0.204    50.46
2019.18    0.205    48.33
2019.28    0.205    46.21
2019.38    0.206    44.10
2019.48    0.206    42.00
2019.58    0.206    39.91
2019.68    0.207    37.82
2019.78    0.207    35.74
2019.88    0.207    33.66
2019.98    0.207    31.58
2020.08    0.207    29.51
2020.18    0.207    27.43
2020.28    0.207    25.35
2020.38    0.207    23.27
2020.48    0.207    21.19
2020.58    0.206    19.10
2020.68    0.206    17.00
2020.78    0.206    14.90
2020.88    0.205    12.79
2020.98    0.205    10.67
2021.08    0.204     8.54
2021.18    0.204     6.40
2021.28    0.203     4.25
2021.38    0.202     2.08
2021.48    0.202   359.90
2021.58    0.201   357.71
2021.68    0.200   355.49
2021.78    0.200   353.27
2021.88    0.199   351.02
2021.98    0.198   348.75
2022.08    0.197   346.47
2022.18    0.196   344.16
2022.28    0.195   341.83
2022.38    0.194   339.48
2022.48    0.193   337.11
2022.58    0.192   334.71
2022.68    0.191   332.28
2022.78    0.190   329.83
2022.88    0.189   327.36
2022.98    0.188   324.85
2023.08    0.187   322.31
2023.18    0.186   319.75
2023.28    0.185   317.15
2023.38    0.183   314.52
2023.48    0.182   311.85
2023.58    0.181   309.15
2023.68    0.180   306.42
2023.78    0.179   303.64
2023.88    0.177   300.83
2023.98    0.176   297.98
2024.08    0.175   295.09
2024.18    0.174   292.15
2024.28    0.172   289.17
2024.38    0.171   286.14
2024.48    0.170   283.07
2024.58    0.168   279.94
2024.68    0.167   276.77
2024.78    0.165   273.54
2024.88    0.164   270.25
2024.98    0.163   266.91
2025.08    0.161   263.51
2025.18    0.160   260.05
2025.28    0.158   256.52
2025.38    0.157   252.93
2025.48    0.155   249.27
2025.58    0.154   245.55
2025.68    0.153   241.75
2025.78    0.151   237.89
2025.88    0.150   233.96
2025.98    0.149   229.95
2026.08    0.147   225.88
2026.18    0.146   221.75
2026.28    0.145   217.55
2026.38    0.144   213.29
2026.48    0.143   208.98
2026.58    0.143   204.62
2026.68    0.142   200.23
2026.78    0.142   195.80
2026.88    0.141   191.35
2026.98    0.141   186.89
2027.08    0.141   182.43
2027.18    0.142   177.97
2027.28    0.142   173.55
2027.38    0.143   169.15
2027.48    0.143   164.80
2027.58    0.144   160.50
2027.68    0.146   156.26
2027.78    0.147   152.09
2027.88    0.148   147.99
2027.98    0.150   143.98
2028.08    0.151   140.06
2028.18    0.153   136.22
2028.28    0.155   132.47
2028.38    0.157   128.81
2028.48    0.159   125.24
2028.58    0.161   121.76
2028.68    0.163   118.37
2028.78    0.165   115.06
2028.88    0.167   111.83
2028.98    0.169   108.69
2029.08    0.171   105.62
2029.18    0.174   102.63
2029.28    0.176    99.71
2029.38    0.178    96.85
2029.48    0.180    94.05
2029.58    0.181    91.32
2029.68    0.183    88.64
2029.78    0.185    86.02
2029.88    0.187    83.44
2029.98    0.189    80.91
2030.08    0.190    78.43
2030.18    0.192    75.99
2030.28    0.193    73.58
2030.38    0.195    71.21
2030.48    0.196    68.88
2030.58    0.197    66.57
2030.68    0.198    64.30
2030.78    0.199    62.04
2030.88    0.200    59.82
2030.98    0.201    57.61
2031.08    0.202    55.43



 

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 16:56:54


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