Double Star Calculator - Orbit

Orbital Elements for ELP1AA,AB
WDS: ELP1AA,AB WDS ID/Discoverer
P: 14.420 Orbital period (years)
a: 0.13 Semi-major axis (arcseconds)
i: 139.7 Inclination (degrees)
Ω: 122.3 Longitude of ascending node (degrees)
T: 2020.000 Epoch of periastron passage (year)
e: 0.032 Eccentricity
ω: 14.7 Longitude of periastron (degrees)
Start-Year: 2017.79 Year
End-Year: 2032.21 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for ELP1AA,AB
Position: 023032.41-434223.3 Epoch-2000 right ascension and declination
WDS-ID: 02305-4342 WDS designation
Discoverer Code: ELP1AA,AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 10.2 Magnitude of the primary
V2: 11.1 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 3 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 ELP1AA,AB



WDS 6th Orbit including measures of ELP1AA,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 ELP1AA,AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.134   303.79
--------------------------
2017.79    0.114   158.24
2017.89    0.116   155.81
2017.99    0.117   153.42
2018.09    0.118   151.09
2018.19    0.119   148.79
2018.29    0.120   146.54
2018.39    0.121   144.32
2018.49    0.122   142.14
2018.59    0.123   139.98
2018.69    0.123   137.86
2018.79    0.124   135.76
2018.89    0.125   133.68
2018.99    0.125   131.61
2019.09    0.125   129.56
2019.19    0.126   127.53
2019.29    0.126   125.49
2019.39    0.126   123.47
2019.49    0.126   121.44
2019.59    0.126   119.41
2019.69    0.126   117.37
2019.79    0.125   115.33
2019.89    0.125   113.27
2019.99    0.124   111.19
2020.09    0.124   109.10
2020.19    0.123   106.98
2020.29    0.122   104.83
2020.39    0.121   102.66
2020.49    0.120   100.44
2020.59    0.119    98.19
2020.69    0.118    95.90
2020.79    0.117    93.57
2020.89    0.116    91.19
2020.99    0.114    88.75
2021.09    0.113    86.26
2021.19    0.112    83.72
2021.29    0.110    81.11
2021.39    0.109    78.44
2021.49    0.108    75.71
2021.59    0.107    72.92
2021.69    0.105    70.06
2021.79    0.104    67.14
2021.89    0.103    64.15
2021.99    0.102    61.10
2022.09    0.101    58.00
2022.19    0.101    54.84
2022.29    0.100    51.63
2022.39    0.099    48.39
2022.49    0.099    45.10
2022.59    0.098    41.80
2022.69    0.098    38.47
2022.79    0.098    35.13
2022.89    0.098    31.80
2022.99    0.098    28.48
2023.09    0.099    25.17
2023.19    0.099    21.90
2023.29    0.100    18.66
2023.39    0.101    15.47
2023.49    0.102    12.32
2023.59    0.103     9.24
2023.69    0.104     6.21
2023.79    0.105     3.25
2023.89    0.106     0.35
2023.99    0.107   357.53
2024.09    0.109   354.77
2024.19    0.110   352.09
2024.29    0.112   349.47
2024.39    0.113   346.91
2024.49    0.114   344.43
2024.59    0.116   342.00
2024.69    0.117   339.64
2024.79    0.119   337.33
2024.89    0.120   335.08
2024.99    0.122   332.88
2025.09    0.123   330.73
2025.19    0.124   328.63
2025.29    0.125   326.56
2025.39    0.127   324.54
2025.49    0.128   322.55
2025.59    0.129   320.59
2025.69    0.130   318.67
2025.79    0.131   316.77
2025.89    0.131   314.89
2025.99    0.132   313.04
2026.09    0.133   311.20
2026.19    0.133   309.38
2026.29    0.133   307.56
2026.39    0.134   305.76
2026.49    0.134   303.97
2026.59    0.134   302.18
2026.69    0.134   300.38
2026.79    0.134   298.59
2026.89    0.134   296.80
2026.99    0.133   294.99
2027.09    0.133   293.18
2027.19    0.132   291.35
2027.29    0.132   289.51
2027.39    0.131   287.65
2027.49    0.130   285.77
2027.59    0.130   283.87
2027.69    0.129   281.94
2027.79    0.128   279.98
2027.89    0.126   277.98
2027.99    0.125   275.96
2028.09    0.124   273.89
2028.19    0.123   271.78
2028.29    0.122   269.63
2028.39    0.120   267.43
2028.49    0.119   265.18
2028.59    0.118   262.88
2028.69    0.116   260.52
2028.79    0.115   258.11
2028.89    0.113   255.63
2028.99    0.112   253.10
2029.09    0.111   250.50
2029.19    0.109   247.84
2029.29    0.108   245.12
2029.39    0.107   242.33
2029.49    0.106   239.48
2029.59    0.105   236.57
2029.69    0.104   233.60
2029.79    0.103   230.58
2029.89    0.102   227.51
2029.99    0.101   224.39
2030.09    0.101   221.24
2030.19    0.100   218.06
2030.29    0.100   214.85
2030.39    0.100   211.63
2030.49    0.100   208.40
2030.59    0.100   205.17
2030.69    0.100   201.95
2030.79    0.100   198.75
2030.89    0.101   195.58
2030.99    0.101   192.44
2031.09    0.102   189.34
2031.19    0.103   186.28
2031.29    0.104   183.27
2031.39    0.105   180.31
2031.49    0.106   177.41
2031.59    0.107   174.57
2031.69    0.108   171.79
2031.79    0.109   169.06
2031.89    0.110   166.40
2031.99    0.112   163.79
2032.09    0.113   161.24
2032.19    0.114   158.74



 

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 15:01:06


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