Double Star Calculator - Orbit

Orbital Elements for HDS33

WDS:	HDS33	WDS ID/Discoverer
P:	10.150	Orbital period (years)
a:	0.1222	Semi-major axis (arcseconds)
i:	27.6	Inclination (degrees)
Ω:	33.3	Longitude of ascending node (degrees)
T:	2013.465	Epoch of periastron passage (year)
e:	0.608	Eccentricity
ω:	82.5	Longitude of periastron (degrees)
Start-Year:	2019.925	Year
End-Year:	2030.075	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS33
Position:	001420.22-273151.9	Epoch-2000 right ascension and declination
WDS-ID:	00143-2732	WDS designation
Discoverer Code:	HDS33	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	1002	HD catalog number
Hipparcos number:	1144	Hipparcos catalog number
V1:	7.93	Magnitude of the primary
V2:	8.88	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:		Flags
Ephemerides:		Ephemerides
Code:	Tok2024c	Reference

Double Star Orbit for HDS33

WDS 6th Orbit including measures of HDS33

-- 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 HDS33

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.156   266.19
--------------------------
2019.92    0.165   312.49
2020.02    0.164   313.86
2020.12    0.162   315.26
2020.22    0.161   316.69
2020.32    0.159   318.14
2020.42    0.158   319.62
2020.52    0.156   321.14
2020.62    0.154   322.69
2020.72    0.152   324.28
2020.82    0.150   325.91
2020.92    0.148   327.58
2021.02    0.146   329.31
2021.12    0.143   331.09
2021.22    0.141   332.93
2021.32    0.138   334.84
2021.42    0.136   336.83
2021.52    0.133   338.89
2021.62    0.130   341.05
2021.72    0.127   343.31
2021.82    0.124   345.69
2021.92    0.120   348.19
2022.02    0.117   350.85
2022.12    0.113   353.67
2022.22    0.109   356.69
2022.32    0.105   359.94
2022.42    0.101     3.45
2022.52    0.096     7.28
2022.62    0.092    11.49
2022.72    0.087    16.17
2022.82    0.082    21.42
2022.92    0.076    27.41
2023.02    0.071    34.33
2023.12    0.065    42.49
2023.22    0.059    52.29
2023.32    0.053    64.27
2023.42    0.048    79.02
2023.52    0.044    96.82
2023.62    0.043   116.91
2023.72    0.044   137.18
2023.82    0.047   155.34
2023.92    0.053   170.40
2024.02    0.059   182.53
2024.12    0.065   192.33
2024.22    0.071   200.39
2024.32    0.077   207.15
2024.42    0.083   212.93
2024.52    0.089   217.96
2024.62    0.094   222.41
2024.72    0.099   226.39
2024.82    0.104   229.99
2024.92    0.109   233.28
2025.02    0.113   236.32
2025.12    0.117   239.13
2025.22    0.121   241.76
2025.32    0.125   244.23
2025.42    0.128   246.56
2025.52    0.132   248.77
2025.62    0.135   250.87
2025.72    0.138   252.88
2025.82    0.141   254.81
2025.92    0.143   256.66
2026.02    0.146   258.44
2026.12    0.148   260.17
2026.22    0.151   261.84
2026.32    0.153   263.46
2026.42    0.155   265.04
2026.52    0.157   266.57
2026.62    0.159   268.07
2026.72    0.160   269.54
2026.82    0.162   270.98
2026.92    0.163   272.39
2027.02    0.165   273.77
2027.12    0.166   275.13
2027.22    0.167   276.48
2027.32    0.168   277.80
2027.42    0.169   279.11
2027.52    0.170   280.40
2027.62    0.171   281.68
2027.72    0.172   282.95
2027.82    0.172   284.21
2027.92    0.173   285.45
2028.02    0.174   286.70
2028.12    0.174   287.93
2028.22    0.174   289.16
2028.32    0.174   290.39
2028.42    0.175   291.61
2028.52    0.175   292.83
2028.62    0.175   294.06
2028.72    0.174   295.28
2028.82    0.174   296.50
2028.92    0.174   297.73
2029.02    0.174   298.96
2029.12    0.173   300.20
2029.22    0.173   301.45
2029.32    0.172   302.70
2029.42    0.171   303.96
2029.52    0.171   305.23
2029.62    0.170   306.52
2029.72    0.169   307.82
2029.82    0.168   309.13
2029.92    0.167   310.46
2030.02    0.166   311.81

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 14:37:06