Double Star Calculator - Orbit

Orbital Elements for RAO27AA,AB
WDS: RAO27AA,AB WDS ID/Discoverer
P: 11.240 Orbital period (years)
a: 0.097 Semi-major axis (arcseconds)
i: 94.7 Inclination (degrees)
Ω: 150.7 Longitude of ascending node (degrees)
T: 2015.880 Epoch of periastron passage (year)
e: 0.403 Eccentricity
ω: 181.4 Longitude of periastron (degrees)
Start-Year: 2019.38 Year
End-Year: 2030.62 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for RAO27AA,AB
Position: 222401.31+061210.2 Epoch-2000 right ascension and declination
WDS-ID: 22240+0612 WDS designation
Discoverer Code: RAO27AA,AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 212426 HD catalog number
Hipparcos number: 110574 Hipparcos catalog number
V1: 8.20 Magnitude of the primary
V2: 8. Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2021 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Tok2021c Reference

Double Star Orbit for RAO27AA,AB



WDS 6th Orbit including measures of RAO27AA,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 RAO27AA,AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.044   335.59
--------------------------
2019.38    0.103   153.70
2019.48    0.106   153.49
2019.58    0.109   153.29
2019.68    0.112   153.11
2019.78    0.115   152.93
2019.88    0.117   152.76
2019.98    0.120   152.60
2020.08    0.122   152.45
2020.18    0.124   152.30
2020.28    0.126   152.15
2020.38    0.127   152.01
2020.48    0.129   151.87
2020.58    0.130   151.74
2020.68    0.132   151.61
2020.78    0.133   151.48
2020.88    0.134   151.35
2020.98    0.134   151.22
2021.08    0.135   151.10
2021.18    0.136   150.98
2021.28    0.136   150.85
2021.38    0.136   150.73
2021.48    0.136   150.61
2021.58    0.136   150.49
2021.68    0.136   150.36
2021.78    0.135   150.24
2021.88    0.135   150.12
2021.98    0.134   149.99
2022.08    0.133   149.87
2022.18    0.132   149.74
2022.28    0.131   149.61
2022.38    0.129   149.47
2022.48    0.128   149.34
2022.58    0.126   149.20
2022.68    0.124   149.05
2022.78    0.122   148.90
2022.88    0.120   148.75
2022.98    0.118   148.59
2023.08    0.116   148.42
2023.18    0.113   148.25
2023.28    0.110   148.07
2023.38    0.107   147.88
2023.48    0.104   147.68
2023.58    0.101   147.46
2023.68    0.098   147.23
2023.78    0.094   146.99
2023.88    0.090   146.72
2023.98    0.087   146.43
2024.08    0.083   146.12
2024.18    0.079   145.77
2024.28    0.074   145.38
2024.38    0.070   144.95
2024.48    0.065   144.45
2024.58    0.060   143.88
2024.68    0.056   143.21
2024.78    0.051   142.40
2024.88    0.046   141.43
2024.98    0.040   140.20
2025.08    0.035   138.60
2025.18    0.030   136.42
2025.28    0.024   133.26
2025.38    0.019   128.29
2025.48    0.014   119.38
2025.58    0.009   100.48
2025.68    0.007    59.69
2025.78    0.009    18.11
2025.88    0.013   358.61
2025.98    0.019   349.46
2026.08    0.024   344.36
2026.18    0.029   341.11
2026.28    0.034   338.85
2026.38    0.039   337.16
2026.48    0.044   335.83
2026.58    0.048   334.74
2026.68    0.051   333.81
2026.78    0.054   332.98
2026.88    0.056   332.24
2026.98    0.057   331.53
2027.08    0.058   330.85
2027.18    0.058   330.18
2027.28    0.057   329.49
2027.38    0.055   328.76
2027.48    0.052   327.96
2027.58    0.049   327.07
2027.68    0.045   326.03
2027.78    0.040   324.77
2027.88    0.035   323.19
2027.98    0.030   321.08
2028.08    0.025   318.10
2028.18    0.020   313.46
2028.28    0.014   305.28
2028.38    0.009   287.99
2028.48    0.007   248.49
2028.58    0.008   203.71
2028.68    0.013   182.69
2028.78    0.018   173.18
2028.88    0.024   168.01
2028.98    0.029   164.79
2029.08    0.035   162.59
2029.18    0.040   160.98
2029.28    0.046   159.75
2029.38    0.051   158.78
2029.48    0.056   157.98
2029.58    0.061   157.32
2029.68    0.066   156.75
2029.78    0.070   156.26
2029.88    0.075   155.83
2029.98    0.079   155.45
2030.08    0.083   155.11
2030.18    0.087   154.80
2030.28    0.091   154.51
2030.38    0.095   154.25
2030.48    0.098   154.01
2030.58    0.102   153.78



 

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 18:39:30


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