Double Star Calculator - Orbit

Orbital Elements for HDS3208AA,AB

WDS:	HDS3208AA,AB	WDS ID/Discoverer
P:	19.130	Orbital period (years)
a:	0.174	Semi-major axis (arcseconds)
i:	70.9	Inclination (degrees)
Ω:	133.6	Longitude of ascending node (degrees)
T:	2021.760	Epoch of periastron passage (year)
e:	0.51	Eccentricity
ω:	209.3	Longitude of periastron (degrees)
Start-Year:	2015.435	Year
End-Year:	2034.565	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3208AA,AB
Position:	223540.15-280759.3	Epoch-2000 right ascension and declination
WDS-ID:	22357-2808	WDS designation
Discoverer Code:	HDS3208AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	213987	HD catalog number
Hipparcos number:	111520	Hipparcos catalog number
V1:	10.94	Magnitude of the primary
V2:	11.23	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2019c	Reference

Double Star Orbit for HDS3208AA,AB

WDS 6th Orbit including measures of HDS3208AA,AB

-- 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 HDS3208AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.209   130.23
--------------------------
2015.43    0.156   157.62
2015.53    0.153   158.29
2015.63    0.149   159.00
2015.73    0.146   159.73
2015.83    0.142   160.51
2015.93    0.139   161.31
2016.03    0.136   162.17
2016.13    0.132   163.06
2016.23    0.129   164.01
2016.33    0.125   165.00
2016.43    0.121   166.06
2016.53    0.118   167.18
2016.63    0.114   168.37
2016.73    0.111   169.64
2016.83    0.107   170.99
2016.93    0.103   172.43
2017.03    0.100   173.99
2017.13    0.096   175.65
2017.23    0.093   177.45
2017.33    0.089   179.38
2017.43    0.086   181.47
2017.53    0.082   183.74
2017.63    0.079   186.20
2017.73    0.076   188.86
2017.83    0.073   191.76
2017.93    0.070   194.91
2018.03    0.067   198.33
2018.13    0.065   202.02
2018.23    0.062   206.01
2018.33    0.060   210.29
2018.43    0.058   214.85
2018.53    0.057   219.67
2018.63    0.056   224.71
2018.73    0.055   229.90
2018.83    0.055   235.19
2018.93    0.055   240.50
2019.03    0.056   245.74
2019.13    0.056   250.86
2019.23    0.058   255.79
2019.33    0.059   260.49
2019.43    0.061   264.93
2019.53    0.063   269.09
2019.63    0.065   272.98
2019.73    0.068   276.61
2019.83    0.070   279.98
2019.93    0.073   283.12
2020.03    0.075   286.05
2020.13    0.078   288.79
2020.23    0.080   291.36
2020.33    0.083   293.78
2020.43    0.085   296.07
2020.53    0.087   298.25
2020.63    0.088   300.35
2020.73    0.090   302.37
2020.83    0.091   304.34
2020.93    0.091   306.27
2021.03    0.091   308.19
2021.13    0.091   310.11
2021.23    0.090   312.06
2021.33    0.089   314.06
2021.43    0.087   316.15
2021.53    0.084   318.35
2021.63    0.081   320.72
2021.73    0.077   323.31
2021.83    0.072   326.21
2021.93    0.067   329.50
2022.03    0.062   333.33
2022.13    0.057   337.89
2022.23    0.051   343.42
2022.33    0.046   350.25
2022.43    0.041   358.77
2022.53    0.037     9.34
2022.63    0.034    21.97
2022.73    0.033    36.01
2022.83    0.034    50.08
2022.93    0.037    62.79
2023.03    0.041    73.41
2023.13    0.046    81.93
2023.23    0.052    88.70
2023.33    0.058    94.09
2023.43    0.064    98.45
2023.53    0.070   102.03
2023.63    0.077   105.01
2023.73    0.083   107.53
2023.83    0.089   109.69
2023.93    0.096   111.57
2024.03    0.102   113.22
2024.13    0.108   114.69
2024.23    0.114   116.00
2024.33    0.119   117.19
2024.43    0.125   118.26
2024.53    0.130   119.25
2024.63    0.136   120.16
2024.73    0.141   121.00
2024.83    0.146   121.78
2024.93    0.151   122.51
2025.03    0.155   123.19
2025.13    0.160   123.84
2025.23    0.164   124.45
2025.33    0.169   125.02
2025.43    0.173   125.57
2025.53    0.177   126.10
2025.63    0.181   126.60
2025.73    0.185   127.08
2025.83    0.188   127.54
2025.93    0.192   127.98
2026.03    0.195   128.41
2026.13    0.198   128.82
2026.23    0.202   129.23
2026.33    0.205   129.61
2026.43    0.207   129.99
2026.53    0.210   130.36
2026.63    0.213   130.72
2026.73    0.215   131.07
2026.83    0.218   131.41
2026.93    0.220   131.74
2027.03    0.222   132.07
2027.13    0.225   132.39
2027.23    0.227   132.71
2027.33    0.228   133.02
2027.43    0.230   133.32
2027.53    0.232   133.62
2027.63    0.234   133.92
2027.73    0.235   134.21
2027.83    0.236   134.50
2027.93    0.238   134.78
2028.03    0.239   135.06
2028.13    0.240   135.34
2028.23    0.241   135.62
2028.33    0.242   135.90
2028.43    0.243   136.17
2028.53    0.244   136.44
2028.63    0.244   136.71
2028.73    0.245   136.98
2028.83    0.246   137.24
2028.93    0.246   137.51
2029.03    0.246   137.77
2029.13    0.247   138.04
2029.23    0.247   138.30
2029.33    0.247   138.56
2029.43    0.247   138.83
2029.53    0.247   139.09
2029.63    0.247   139.35
2029.73    0.246   139.62
2029.83    0.246   139.88
2029.93    0.246   140.15
2030.03    0.245   140.41
2030.13    0.245   140.68
2030.23    0.244   140.95
2030.33    0.243   141.22
2030.43    0.243   141.49
2030.53    0.242   141.76
2030.63    0.241   142.04
2030.73    0.240   142.32
2030.83    0.239   142.60
2030.93    0.238   142.88
2031.03    0.237   143.16
2031.13    0.235   143.45
2031.23    0.234   143.74
2031.33    0.233   144.03
2031.43    0.231   144.33
2031.53    0.230   144.63
2031.63    0.228   144.94
2031.73    0.227   145.25
2031.83    0.225   145.56
2031.93    0.223   145.88
2032.03    0.221   146.21
2032.13    0.219   146.54
2032.23    0.218   146.87
2032.33    0.216   147.22
2032.43    0.213   147.56
2032.53    0.211   147.92
2032.63    0.209   148.28
2032.73    0.207   148.65
2032.83    0.205   149.03
2032.93    0.202   149.42
2033.03    0.200   149.82
2033.13    0.197   150.22
2033.23    0.195   150.64
2033.33    0.192   151.07
2033.43    0.189   151.51
2033.53    0.187   151.97
2033.63    0.184   152.43
2033.73    0.181   152.91
2033.83    0.178   153.41
2033.93    0.175   153.92
2034.03    0.172   154.45
2034.13    0.169   155.00
2034.23    0.166   155.57
2034.33    0.163   156.17
2034.43    0.160   156.78
2034.53    0.157   157.42

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 18:41:57