Double Star Calculator - Orbit

Orbital Elements for HDS787

WDS:	HDS787	WDS ID/Discoverer
P:	11.851	Orbital period (years)
a:	0.12	Semi-major axis (arcseconds)
i:	56.9	Inclination (degrees)
Ω:	153.3	Longitude of ascending node (degrees)
T:	1999.917	Epoch of periastron passage (year)
e:	0.2285	Eccentricity
ω:	91.8	Longitude of periastron (degrees)
Start-Year:	2019.0745	Year
End-Year:	2030.9255	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS787
Position:	055229.48-021707.1	Epoch-2000 right ascension and declination
WDS-ID:	05525-0217	WDS designation
Discoverer Code:	HDS787	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	39438	HD catalog number
Hipparcos number:	27758	Hipparcos catalog number
V1:	7.77	Magnitude of the primary
V2:	8.65	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:	Msn2023	Reference

Double Star Orbit for HDS787

WDS 6th Orbit including measures of HDS787

-- 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 HDS787

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.117   347.54
--------------------------
2019.07    0.098   109.28
2019.17    0.099   111.68
2019.27    0.101   113.99
2019.37    0.103   116.22
2019.47    0.105   118.38
2019.57    0.107   120.46
2019.67    0.108   122.48
2019.77    0.110   124.44
2019.87    0.111   126.34
2019.97    0.113   128.20
2020.07    0.114   130.01
2020.17    0.115   131.78
2020.27    0.116   133.51
2020.37    0.117   135.22
2020.47    0.118   136.91
2020.57    0.118   138.57
2020.67    0.119   140.22
2020.77    0.119   141.86
2020.87    0.119   143.50
2020.97    0.119   145.15
2021.07    0.118   146.80
2021.17    0.118   148.47
2021.27    0.117   150.16
2021.37    0.116   151.88
2021.47    0.114   153.64
2021.57    0.113   155.44
2021.67    0.111   157.31
2021.77    0.108   159.25
2021.87    0.106   161.27
2021.97    0.103   163.39
2022.07    0.100   165.64
2022.17    0.097   168.03
2022.27    0.093   170.60
2022.37    0.090   173.37
2022.47    0.086   176.38
2022.57    0.082   179.69
2022.67    0.078   183.35
2022.77    0.073   187.42
2022.87    0.069   191.99
2022.97    0.065   197.13
2023.07    0.061   202.95
2023.17    0.058   209.49
2023.27    0.055   216.81
2023.37    0.053   224.87
2023.47    0.051   233.53
2023.57    0.051   242.55
2023.67    0.051   251.60
2023.77    0.052   260.37
2023.87    0.054   268.57
2023.97    0.057   276.06
2024.07    0.061   282.78
2024.17    0.064   288.75
2024.27    0.068   294.04
2024.37    0.072   298.73
2024.47    0.077   302.92
2024.57    0.081   306.67
2024.67    0.085   310.06
2024.77    0.089   313.15
2024.87    0.092   315.98
2024.97    0.096   318.61
2025.07    0.099   321.05
2025.17    0.102   323.35
2025.27    0.105   325.52
2025.37    0.107   327.59
2025.47    0.109   329.57
2025.57    0.111   331.48
2025.67    0.113   333.33
2025.77    0.114   335.13
2025.87    0.115   336.89
2025.97    0.116   338.62
2026.07    0.117   340.33
2026.17    0.117   342.03
2026.27    0.117   343.72
2026.37    0.117   345.41
2026.47    0.117   347.11
2026.57    0.117   348.81
2026.67    0.116   350.53
2026.77    0.115   352.28
2026.87    0.114   354.05
2026.97    0.113   355.85
2027.07    0.112   357.69
2027.17    0.110   359.57
2027.27    0.109     1.51
2027.37    0.107     3.49
2027.47    0.106     5.54
2027.57    0.104     7.65
2027.67    0.102     9.83
2027.77    0.101    12.09
2027.87    0.099    14.43
2027.97    0.097    16.86
2028.07    0.095    19.37
2028.17    0.094    21.98
2028.27    0.092    24.69
2028.37    0.090    27.50
2028.47    0.089    30.41
2028.57    0.087    33.43
2028.67    0.086    36.54
2028.77    0.085    39.74
2028.87    0.083    43.04
2028.97    0.083    46.42
2029.07    0.082    49.86
2029.17    0.081    53.37
2029.27    0.081    56.92
2029.37    0.081    60.50
2029.47    0.081    64.08
2029.57    0.081    67.67
2029.67    0.081    71.23
2029.77    0.082    74.75
2029.87    0.082    78.21
2029.97    0.083    81.61
2030.07    0.084    84.93
2030.17    0.085    88.16
2030.27    0.087    91.30
2030.37    0.088    94.34
2030.47    0.090    97.28
2030.57    0.091   100.12
2030.67    0.093   102.85
2030.77    0.095   105.49
2030.87    0.097   108.02

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 15:41:30