Double Star Calculator - Orbit

Orbital Elements for HDO150AB

WDS:	HDO150AB	WDS ID/Discoverer
P:	21.000	Orbital period (years)
a:	0.489	Semi-major axis (arcseconds)
i:	111.1	Inclination (degrees)
Ω:	74.0	Longitude of ascending node (degrees)
T:	2005.990	Epoch of periastron passage (year)
e:	0.211	Eccentricity
ω:	7.2	Longitude of periastron (degrees)
Start-Year:	2014.5	Year
End-Year:	2035.5	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDO150AB
Position:	190236.72-295248.4	Epoch-2000 right ascension and declination
WDS-ID:	19026-2953	WDS designation
Discoverer Code:	HDO150AB	Discover designation and components
ADS number:	11950	Aitken Double Star catalog
HD number:	176687	HD catalog number
Hipparcos number:	93506	Hipparcos catalog number
V1:	3.27	Magnitude of the primary
V2:	3.48	Magnitude of the secondary
Equinox:		Equinox
Date:	2011	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:	DRs2012	Reference

Double Star Orbit for HDO150AB

WDS 6th Orbit including measures of HDO150AB

-- 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 HDO150AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.386    76.15
--------------------------
2014.50    0.561   259.84
2014.60    0.565   259.38
2014.70    0.568   258.94
2014.80    0.572   258.49
2014.90    0.575   258.05
2015.00    0.578   257.62
2015.10    0.580   257.19
2015.20    0.582   256.76
2015.30    0.584   256.34
2015.40    0.586   255.92
2015.50    0.588   255.50
2015.60    0.589   255.08
2015.70    0.590   254.67
2015.80    0.591   254.25
2015.90    0.591   253.84
2016.00    0.591   253.43
2016.10    0.591   253.01
2016.20    0.591   252.60
2016.30    0.590   252.19
2016.40    0.589   251.77
2016.50    0.588   251.35
2016.60    0.587   250.94
2016.70    0.585   250.52
2016.80    0.583   250.09
2016.90    0.581   249.67
2017.00    0.578   249.24
2017.10    0.575   248.80
2017.20    0.572   248.36
2017.30    0.569   247.92
2017.40    0.566   247.47
2017.50    0.562   247.02
2017.60    0.558   246.56
2017.70    0.553   246.09
2017.80    0.549   245.62
2017.90    0.544   245.13
2018.00    0.539   244.64
2018.10    0.534   244.14
2018.20    0.528   243.63
2018.30    0.523   243.11
2018.40    0.517   242.57
2018.50    0.510   242.03
2018.60    0.504   241.47
2018.70    0.497   240.89
2018.80    0.490   240.30
2018.90    0.483   239.69
2019.00    0.476   239.06
2019.10    0.469   238.42
2019.20    0.461   237.75
2019.30    0.453   237.06
2019.40    0.445   236.34
2019.50    0.437   235.60
2019.60    0.428   234.83
2019.70    0.420   234.03
2019.80    0.411   233.19
2019.90    0.402   232.32
2020.00    0.393   231.40
2020.10    0.383   230.44
2020.20    0.374   229.44
2020.30    0.365   228.38
2020.40    0.355   227.27
2020.50    0.345   226.09
2020.60    0.336   224.85
2020.70    0.326   223.53
2020.80    0.316   222.13
2020.90    0.306   220.64
2021.00    0.296   219.05
2021.10    0.287   217.35
2021.20    0.277   215.53
2021.30    0.267   213.58
2021.40    0.258   211.49
2021.50    0.248   209.23
2021.60    0.239   206.81
2021.70    0.231   204.19
2021.80    0.222   201.38
2021.90    0.214   198.34
2022.00    0.206   195.07
2022.10    0.199   191.57
2022.20    0.193   187.81
2022.30    0.187   183.82
2022.40    0.182   179.59
2022.50    0.178   175.15
2022.60    0.175   170.54
2022.70    0.173   165.78
2022.80    0.172   160.94
2022.90    0.172   156.08
2023.00    0.174   151.25
2023.10    0.176   146.52
2023.20    0.179   141.92
2023.30    0.183   137.51
2023.40    0.188   133.31
2023.50    0.194   129.35
2023.60    0.200   125.62
2023.70    0.207   122.13
2023.80    0.214   118.87
2023.90    0.222   115.84
2024.00    0.230   113.02
2024.10    0.238   110.39
2024.20    0.247   107.94
2024.30    0.256   105.66
2024.40    0.264   103.52
2024.50    0.273   101.52
2024.60    0.282    99.64
2024.70    0.290    97.88
2024.80    0.298    96.21
2024.90    0.307    94.63
2025.00    0.314    93.14
2025.10    0.322    91.71
2025.20    0.329    90.35
2025.30    0.336    89.05
2025.40    0.343    87.80
2025.50    0.349    86.60
2025.60    0.355    85.44
2025.70    0.361    84.32
2025.80    0.366    83.22
2025.90    0.370    82.16
2026.00    0.374    81.12
2026.10    0.378    80.09
2026.20    0.380    79.09
2026.30    0.383    78.10
2026.40    0.385    77.12
2026.50    0.386    76.15
2026.60    0.386    75.18
2026.70    0.386    74.22
2026.80    0.386    73.25
2026.90    0.385    72.28
2027.00    0.383    71.30
2027.10    0.381    70.31
2027.20    0.378    69.31
2027.30    0.374    68.29
2027.40    0.370    67.24
2027.50    0.366    66.18
2027.60    0.361    65.09
2027.70    0.355    63.96
2027.80    0.349    62.79
2027.90    0.342    61.59
2028.00    0.335    60.33
2028.10    0.328    59.02
2028.20    0.320    57.64
2028.30    0.312    56.20
2028.40    0.304    54.68
2028.50    0.295    53.07
2028.60    0.286    51.36
2028.70    0.277    49.53
2028.80    0.268    47.59
2028.90    0.258    45.50
2029.00    0.249    43.25
2029.10    0.240    40.83
2029.20    0.230    38.22
2029.30    0.221    35.39
2029.40    0.213    32.32
2029.50    0.204    29.00
2029.60    0.196    25.40
2029.70    0.189    21.52
2029.80    0.182    17.33
2029.90    0.177    12.85
2030.00    0.172     8.09
2030.10    0.168     3.08
2030.20    0.165   357.87
2030.30    0.164   352.52
2030.40    0.163   347.12
2030.50    0.164   341.75
2030.60    0.167   336.48
2030.70    0.170   331.39
2030.80    0.175   326.54
2030.90    0.180   321.95
2031.00    0.187   317.67
2031.10    0.194   313.68
2031.20    0.202   310.00
2031.30    0.210   306.60
2031.40    0.219   303.48
2031.50    0.229   300.61
2031.60    0.239   297.96
2031.70    0.249   295.53
2031.80    0.259   293.29
2031.90    0.269   291.21
2032.00    0.279   289.29
2032.10    0.290   287.51
2032.20    0.300   285.86
2032.30    0.311   284.31
2032.40    0.321   282.87
2032.50    0.332   281.52
2032.60    0.342   280.24
2032.70    0.352   279.05
2032.80    0.362   277.92
2032.90    0.372   276.85
2033.00    0.382   275.84
2033.10    0.392   274.88
2033.20    0.402   273.96
2033.30    0.411   273.09
2033.40    0.420   272.25
2033.50    0.429   271.45
2033.60    0.438   270.68
2033.70    0.446   269.94
2033.80    0.455   269.23
2033.90    0.463   268.55
2034.00    0.471   267.89
2034.10    0.479   267.25
2034.20    0.486   266.63
2034.30    0.493   266.03
2034.40    0.500   265.44
2034.50    0.507   264.87
2034.60    0.514   264.32
2034.70    0.520   263.78
2034.80    0.526   263.25
2034.90    0.532   262.74
2035.00    0.537   262.23
2035.10    0.542   261.74
2035.20    0.547   261.25
2035.30    0.552   260.77
2035.40    0.556   260.30

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 17:58:23