Double Star Calculator - Orbit

Orbital Elements for A88AB
WDS: A88AB WDS ID/Discoverer
P: 12.135 Orbital period (years)
a: 0.1461 Semi-major axis (arcseconds)
i: 123.9 Inclination (degrees)
Ω: 173.4 Longitude of ascending node (degrees)
T: 2007.180 Epoch of periastron passage (year)
e: 0.2567 Eccentricity
ω: 79.7 Longitude of periastron (degrees)
Start-Year: 2018.9325 Year
End-Year: 2031.0675 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for A88AB
Position: 183823.80-031137.4 Epoch-2000 right ascension and declination
WDS-ID: 18384-0312 WDS designation
Discoverer Code: A88AB Discover designation and components
ADS number: 11520 Aitken Double Star catalog
HD number: 172088 HD catalog number
Hipparcos number: 91394 Hipparcos catalog number
V1: 7.22 Magnitude of the primary
V2: 7.51 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 1 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Hrt2013d Reference

Double Star Orbit for A88AB



WDS 6th Orbit including measures of A88AB

-- 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 A88AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.104   245.38
--------------------------
2018.93    0.076   129.38
2019.03    0.072   123.16
2019.13    0.068   116.18
2019.23    0.065   108.40
2019.33    0.062    99.92
2019.43    0.061    90.91
2019.53    0.061    81.68
2019.63    0.062    72.58
2019.73    0.064    63.92
2019.83    0.067    55.93
2019.93    0.071    48.73
2020.03    0.075    42.32
2020.13    0.080    36.64
2020.23    0.085    31.63
2020.33    0.090    27.19
2020.43    0.095    23.23
2020.53    0.101    19.67
2020.63    0.106    16.46
2020.73    0.110    13.53
2020.83    0.115    10.84
2020.93    0.119     8.36
2021.03    0.123     6.04
2021.13    0.127     3.86
2021.23    0.131     1.81
2021.33    0.134   359.86
2021.43    0.137   358.00
2021.53    0.139   356.21
2021.63    0.142   354.48
2021.73    0.144   352.81
2021.83    0.145   351.17
2021.93    0.147   349.58
2022.03    0.148   348.01
2022.13    0.149   346.46
2022.23    0.150   344.93
2022.33    0.150   343.42
2022.43    0.150   341.90
2022.53    0.150   340.39
2022.63    0.150   338.88
2022.73    0.150   337.36
2022.83    0.149   335.83
2022.93    0.148   334.28
2023.03    0.147   332.72
2023.13    0.146   331.13
2023.23    0.145   329.52
2023.33    0.143   327.88
2023.43    0.142   326.20
2023.53    0.140   324.49
2023.63    0.139   322.73
2023.73    0.137   320.93
2023.83    0.135   319.08
2023.93    0.133   317.17
2024.03    0.131   315.21
2024.13    0.129   313.19
2024.23    0.127   311.10
2024.33    0.125   308.94
2024.43    0.123   306.70
2024.53    0.121   304.39
2024.63    0.119   302.01
2024.73    0.117   299.54
2024.83    0.115   296.98
2024.93    0.113   294.34
2025.03    0.111   291.62
2025.13    0.109   288.81
2025.23    0.108   285.92
2025.33    0.107   282.96
2025.43    0.105   279.92
2025.53    0.104   276.81
2025.63    0.103   273.65
2025.73    0.103   270.43
2025.83    0.102   267.18
2025.93    0.102   263.90
2026.03    0.102   260.61
2026.13    0.102   257.31
2026.23    0.102   254.02
2026.33    0.103   250.76
2026.43    0.103   247.53
2026.53    0.104   244.35
2026.63    0.105   241.22
2026.73    0.106   238.15
2026.83    0.107   235.15
2026.93    0.109   232.22
2027.03    0.110   229.37
2027.13    0.112   226.60
2027.23    0.113   223.91
2027.33    0.115   221.30
2027.43    0.117   218.77
2027.53    0.119   216.31
2027.63    0.121   213.93
2027.73    0.122   211.62
2027.83    0.124   209.37
2027.93    0.126   207.19
2028.03    0.128   205.06
2028.13    0.129   202.98
2028.23    0.131   200.96
2028.33    0.132   198.98
2028.43    0.133   197.04
2028.53    0.134   195.13
2028.63    0.135   193.24
2028.73    0.136   191.39
2028.83    0.136   189.55
2028.93    0.137   187.72
2029.03    0.137   185.89
2029.13    0.137   184.07
2029.23    0.136   182.23
2029.33    0.136   180.39
2029.43    0.135   178.52
2029.53    0.133   176.61
2029.63    0.132   174.67
2029.73    0.130   172.67
2029.83    0.127   170.61
2029.93    0.125   168.47
2030.03    0.122   166.23
2030.13    0.119   163.87
2030.23    0.115   161.37
2030.33    0.111   158.70
2030.43    0.107   155.83
2030.53    0.102   152.71
2030.63    0.098   149.30
2030.73    0.093   145.54
2030.83    0.088   141.35
2030.93    0.083   136.66
2031.03    0.078   131.38



 

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 17:53:38


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