Double Star Calculator - Orbit

Orbital Elements for A111AB

WDS:	A111AB	WDS ID/Discoverer
P:	10.640	Orbital period (years)
a:	0.122	Semi-major axis (arcseconds)
i:	155.7	Inclination (degrees)
Ω:	206.5	Longitude of ascending node (degrees)
T:	2015.190	Epoch of periastron passage (year)
e:	0.538	Eccentricity
ω:	101.6	Longitude of periastron (degrees)
Start-Year:	2019.68	Year
End-Year:	2030.32	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A111AB
Position:	003208.28-051043.3	Epoch-2000 right ascension and declination
WDS-ID:	00321-0511	WDS designation
Discoverer Code:	A111AB	Discover designation and components
ADS number:	450	Aitken Double Star catalog
HD number:	2880	HD catalog number
Hipparcos number:	2533	Hipparcos catalog number
V1:	9.4	Magnitude of the primary
V2:	9.4	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	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:	Tok2015c	Reference

Double Star Orbit for A111AB

WDS 6th Orbit including measures of A111AB

-- 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 A111AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.075    31.45
--------------------------
2019.68    0.168   294.89
2019.78    0.169   293.52
2019.88    0.169   292.17
2019.98    0.170   290.82
2020.08    0.170   289.49
2020.18    0.171   288.16
2020.28    0.171   286.83
2020.38    0.171   285.52
2020.48    0.172   284.20
2020.58    0.172   282.89
2020.68    0.172   281.58
2020.78    0.172   280.27
2020.88    0.172   278.96
2020.98    0.172   277.64
2021.08    0.171   276.33
2021.18    0.171   275.01
2021.28    0.171   273.68
2021.38    0.170   272.35
2021.48    0.170   271.01
2021.58    0.169   269.66
2021.68    0.168   268.29
2021.78    0.167   266.92
2021.88    0.166   265.53
2021.98    0.165   264.12
2022.08    0.164   262.70
2022.18    0.163   261.26
2022.28    0.162   259.80
2022.38    0.161   258.31
2022.48    0.159   256.80
2022.58    0.158   255.25
2022.68    0.156   253.68
2022.78    0.154   252.07
2022.88    0.152   250.43
2022.98    0.150   248.74
2023.08    0.148   247.01
2023.18    0.146   245.22
2023.28    0.144   243.38
2023.38    0.141   241.48
2023.48    0.139   239.51
2023.58    0.136   237.47
2023.68    0.133   235.34
2023.78    0.130   233.12
2023.88    0.127   230.79
2023.98    0.124   228.34
2024.08    0.121   225.76
2024.18    0.117   223.03
2024.28    0.113   220.11
2024.38    0.110   217.00
2024.48    0.105   213.65
2024.58    0.101   210.02
2024.68    0.097   206.07
2024.78    0.092   201.73
2024.88    0.087   196.93
2024.98    0.082   191.56
2025.08    0.077   185.50
2025.18    0.072   178.60
2025.28    0.067   170.68
2025.38    0.063   161.53
2025.48    0.058   150.96
2025.58    0.055   138.89
2025.68    0.053   125.45
2025.78    0.052   111.09
2025.88    0.052    96.59
2025.98    0.054    82.72
2026.08    0.057    70.06
2026.18    0.061    58.83
2026.28    0.065    48.99
2026.38    0.069    40.39
2026.48    0.074    32.84
2026.58    0.078    26.17
2026.68    0.083    20.23
2026.78    0.087    14.88
2026.88    0.091    10.03
2026.98    0.096     5.60
2027.08    0.099     1.53
2027.18    0.103   357.76
2027.28    0.107   354.25
2027.38    0.110   350.97
2027.48    0.114   347.88
2027.58    0.117   344.97
2027.68    0.120   342.22
2027.78    0.123   339.60
2027.88    0.126   337.10
2027.98    0.129   334.71
2028.08    0.131   332.42
2028.18    0.134   330.22
2028.28    0.136   328.11
2028.38    0.139   326.06
2028.48    0.141   324.08
2028.58    0.143   322.17
2028.68    0.145   320.31
2028.78    0.147   318.50
2028.88    0.149   316.74
2028.98    0.151   315.03
2029.08    0.153   313.35
2029.18    0.154   311.71
2029.28    0.156   310.11
2029.38    0.158   308.53
2029.48    0.159   306.99
2029.58    0.160   305.47
2029.68    0.162   303.98
2029.78    0.163   302.51
2029.88    0.164   301.06
2029.98    0.165   299.63
2030.08    0.166   298.21
2030.18    0.167   296.82
2030.28    0.168   295.43

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 14:40:23