Double Star Calculator - Orbit

Orbital Elements for I528AB

WDS:	I528AB	WDS ID/Discoverer
P:	15.950	Orbital period (years)
a:	0.0484	Semi-major axis (arcseconds)
i:	32.8	Inclination (degrees)
Ω:	226.5	Longitude of ascending node (degrees)
T:	2023.470	Epoch of periastron passage (year)
e:	0.628	Eccentricity
ω:	76.1	Longitude of periastron (degrees)
Start-Year:	2017.025	Year
End-Year:	2032.975	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I528AB
Position:	144520.60-360851.9	Epoch-2000 right ascension and declination
WDS-ID:	14453-3609	WDS designation
Discoverer Code:	I528AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	129732	HD catalog number
Hipparcos number:	72140	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	8.2	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2024c	Reference

Double Star Orbit for I528AB

WDS 6th Orbit including measures of I528AB

-- 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 I528AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.053    76.73
--------------------------
2017.03    0.065   132.25
2017.12    0.064   133.08
2017.22    0.064   133.92
2017.32    0.064   134.77
2017.42    0.063   135.63
2017.52    0.063   136.49
2017.62    0.063   137.36
2017.72    0.062   138.24
2017.82    0.062   139.14
2017.92    0.062   140.04
2018.02    0.061   140.95
2018.12    0.061   141.87
2018.22    0.061   142.80
2018.32    0.060   143.75
2018.42    0.060   144.71
2018.52    0.059   145.68
2018.62    0.059   146.67
2018.72    0.059   147.67
2018.82    0.058   148.69
2018.92    0.058   149.72
2019.02    0.057   150.78
2019.12    0.057   151.85
2019.22    0.056   152.94
2019.32    0.056   154.05
2019.42    0.055   155.18
2019.52    0.054   156.33
2019.62    0.054   157.51
2019.72    0.053   158.72
2019.82    0.053   159.95
2019.92    0.052   161.21
2020.02    0.051   162.50
2020.12    0.051   163.83
2020.22    0.050   165.19
2020.32    0.049   166.58
2020.42    0.049   168.02
2020.52    0.048   169.50
2020.62    0.047   171.02
2020.72    0.047   172.59
2020.82    0.046   174.22
2020.92    0.045   175.91
2021.02    0.044   177.65
2021.12    0.043   179.46
2021.22    0.042   181.35
2021.32    0.041   183.32
2021.42    0.041   185.37
2021.52    0.040   187.53
2021.62    0.039   189.79
2021.72    0.038   192.17
2021.82    0.037   194.69
2021.92    0.035   197.36
2022.02    0.034   200.20
2022.12    0.033   203.23
2022.22    0.032   206.50
2022.32    0.031   210.03
2022.42    0.029   213.87
2022.52    0.028   218.08
2022.62    0.027   222.73
2022.72    0.025   227.92
2022.82    0.024   233.78
2022.92    0.022   240.46
2023.02    0.020   248.17
2023.12    0.019   257.14
2023.22    0.017   267.63
2023.32    0.016   279.80
2023.42    0.016   293.54
2023.52    0.015   308.27
2023.62    0.016   323.02
2023.72    0.016   336.76
2023.82    0.018   348.88
2023.92    0.019   359.24
2024.02    0.021     7.97
2024.12    0.023    15.36
2024.22    0.024    21.66
2024.32    0.026    27.09
2024.42    0.028    31.84
2024.52    0.030    36.02
2024.62    0.031    39.76
2024.72    0.033    43.13
2024.82    0.034    46.20
2024.92    0.036    49.01
2025.02    0.037    51.60
2025.12    0.039    54.00
2025.22    0.040    56.25
2025.32    0.041    58.35
2025.42    0.042    60.33
2025.52    0.044    62.21
2025.62    0.045    63.99
2025.72    0.046    65.68
2025.82    0.047    67.30
2025.92    0.048    68.85
2026.02    0.049    70.34
2026.12    0.050    71.78
2026.22    0.050    73.16
2026.32    0.051    74.49
2026.42    0.052    75.79
2026.52    0.053    77.04
2026.62    0.054    78.26
2026.72    0.054    79.44
2026.82    0.055    80.59
2026.92    0.056    81.72
2027.02    0.056    82.82
2027.12    0.057    83.89
2027.22    0.058    84.94
2027.32    0.058    85.97
2027.42    0.059    86.98
2027.52    0.059    87.97
2027.62    0.060    88.94
2027.72    0.060    89.90
2027.82    0.061    90.84
2027.92    0.061    91.77
2028.02    0.062    92.69
2028.12    0.062    93.59
2028.22    0.063    94.48
2028.32    0.063    95.36
2028.42    0.063    96.23
2028.52    0.064    97.09
2028.62    0.064    97.94
2028.72    0.064    98.78
2028.82    0.065    99.62
2028.92    0.065   100.45
2029.02    0.065   101.27
2029.12    0.065   102.08
2029.22    0.066   102.89
2029.32    0.066   103.69
2029.42    0.066   104.49
2029.52    0.066   105.28
2029.62    0.066   106.07
2029.72    0.066   106.86
2029.82    0.067   107.64
2029.92    0.067   108.42
2030.02    0.067   109.20
2030.12    0.067   109.97
2030.22    0.067   110.74
2030.32    0.067   111.51
2030.42    0.067   112.28
2030.52    0.067   113.05
2030.62    0.067   113.81
2030.72    0.067   114.58
2030.82    0.067   115.34
2030.92    0.067   116.11
2031.02    0.067   116.87
2031.12    0.067   117.64
2031.22    0.067   118.40
2031.32    0.067   119.17
2031.42    0.067   119.94
2031.52    0.067   120.71
2031.62    0.067   121.48
2031.72    0.067   122.26
2031.82    0.067   123.04
2031.92    0.067   123.82
2032.02    0.066   124.60
2032.12    0.066   125.38
2032.22    0.066   126.17
2032.32    0.066   126.97
2032.42    0.066   127.77
2032.52    0.066   128.57
2032.62    0.065   129.38
2032.72    0.065   130.19
2032.82    0.065   131.01
2032.92    0.065   131.83

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 17:08:20