Double Star Calculator - Orbit

Orbital Elements for YR1AA,AB
WDS: YR1AA,AB WDS ID/Discoverer
P: 13.350 Orbital period (years)
a: 0.1208 Semi-major axis (arcseconds)
i: 69.6 Inclination (degrees)
Ω: 167.8 Longitude of ascending node (degrees)
T: 2014.410 Epoch of periastron passage (year)
e: 0.024 Eccentricity
ω: 270.3 Longitude of periastron (degrees)
Start-Year: 2018.325 Year
End-Year: 2031.675 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for YR1AA,AB
Position: 002740.29-162434.3 Epoch-2000 right ascension and declination
WDS-ID: 00277-1625 WDS designation
Discoverer Code: YR1AA,AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 2394 HD catalog number
Hipparcos number: 2190 Hipparcos catalog number
V1: 7.51 Magnitude of the primary
V2: 8.72 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2020e Reference

Double Star Orbit for YR1AA,AB



WDS 6th Orbit including measures of YR1AA,AB

-- 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 YR1AA,AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.076    14.05
--------------------------
2018.33    0.116   174.45
2018.42    0.115   175.48
2018.52    0.113   176.54
2018.62    0.111   177.64
2018.72    0.109   178.78
2018.82    0.106   179.96
2018.92    0.104   181.20
2019.02    0.101   182.51
2019.12    0.098   183.88
2019.22    0.095   185.35
2019.32    0.092   186.91
2019.42    0.089   188.58
2019.52    0.086   190.38
2019.62    0.082   192.34
2019.72    0.079   194.46
2019.82    0.075   196.79
2019.92    0.071   199.34
2020.02    0.068   202.17
2020.12    0.064   205.32
2020.22    0.061   208.82
2020.32    0.058   212.73
2020.42    0.054   217.12
2020.52    0.052   222.01
2020.62    0.049   227.46
2020.72    0.047   233.47
2020.82    0.045   240.00
2020.92    0.044   246.97
2021.02    0.043   254.24
2021.12    0.043   261.61
2021.22    0.044   268.86
2021.32    0.045   275.82
2021.42    0.047   282.34
2021.52    0.049   288.33
2021.62    0.052   293.76
2021.72    0.055   298.64
2021.82    0.058   303.00
2021.92    0.061   306.90
2022.02    0.064   310.39
2022.12    0.068   313.52
2022.22    0.072   316.34
2022.32    0.075   318.89
2022.42    0.079   321.21
2022.52    0.082   323.33
2022.62    0.086   325.27
2022.72    0.089   327.07
2022.82    0.092   328.74
2022.92    0.095   330.30
2023.02    0.098   331.76
2023.12    0.101   333.13
2023.22    0.104   334.43
2023.32    0.106   335.67
2023.42    0.109   336.86
2023.52    0.111   337.99
2023.62    0.113   339.09
2023.72    0.115   340.14
2023.82    0.116   341.17
2023.92    0.118   342.18
2024.02    0.119   343.16
2024.12    0.120   344.13
2024.22    0.120   345.08
2024.32    0.121   346.03
2024.42    0.121   346.97
2024.52    0.121   347.91
2024.62    0.120   348.85
2024.72    0.120   349.80
2024.82    0.119   350.76
2024.92    0.118   351.73
2025.02    0.117   352.72
2025.12    0.116   353.74
2025.22    0.114   354.78
2025.32    0.112   355.86
2025.42    0.110   356.97
2025.52    0.108   358.13
2025.62    0.105   359.34
2025.72    0.102     0.62
2025.82    0.099     1.97
2025.92    0.096     3.39
2026.02    0.093     4.92
2026.12    0.090     6.56
2026.22    0.086     8.33
2026.32    0.083    10.25
2026.42    0.079    12.34
2026.52    0.075    14.65
2026.62    0.071    17.20
2026.72    0.068    20.04
2026.82    0.064    23.21
2026.92    0.060    26.79
2027.02    0.057    30.82
2027.12    0.053    35.40
2027.22    0.050    40.57
2027.32    0.047    46.41
2027.42    0.045    52.93
2027.52    0.043    60.09
2027.62    0.042    67.79
2027.72    0.041    75.82
2027.82    0.041    83.92
2027.92    0.042    91.81
2028.02    0.044    99.25
2028.12    0.046   106.09
2028.22    0.049   112.26
2028.32    0.052   117.76
2028.42    0.055   122.62
2028.52    0.058   126.91
2028.62    0.062   130.70
2028.72    0.066   134.06
2028.82    0.070   137.06
2028.92    0.073   139.74
2029.02    0.077   142.16
2029.12    0.081   144.36
2029.22    0.085   146.36
2029.32    0.088   148.20
2029.42    0.092   149.90
2029.52    0.095   151.48
2029.62    0.098   152.95
2029.72    0.101   154.34
2029.82    0.104   155.65
2029.92    0.106   156.89
2030.02    0.109   158.08
2030.12    0.111   159.21
2030.22    0.113   160.31
2030.32    0.115   161.36
2030.42    0.116   162.39
2030.52    0.118   163.39
2030.62    0.119   164.38
2030.72    0.120   165.34
2030.82    0.120   166.29
2030.92    0.121   167.24
2031.02    0.121   168.18
2031.12    0.121   169.12
2031.22    0.120   170.07
2031.32    0.120   171.02
2031.42    0.119   171.98
2031.52    0.118   172.95
2031.62    0.117   173.95



 

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 14:39:34


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