Double Star Calculator - Orbit

Orbital Elements for HDS3109

WDS:	HDS3109	WDS ID/Discoverer
P:	16.790	Orbital period (years)
a:	0.1782	Semi-major axis (arcseconds)
i:	86.9	Inclination (degrees)
Ω:	307.5	Longitude of ascending node (degrees)
T:	2004.150	Epoch of periastron passage (year)
e:	0.246	Eccentricity
ω:	255.3	Longitude of periastron (degrees)
Start-Year:	2016.605	Year
End-Year:	2033.395	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3109
Position:	215023.73-581817.4	Epoch-2000 right ascension and declination
WDS-ID:	21504-5818	WDS designation
Discoverer Code:	HDS3109	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	207377	HD catalog number
Hipparcos number:	107806	Hipparcos catalog number
V1:	8.56	Magnitude of the primary
V2:	9.07	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2017b	Reference

Double Star Orbit for HDS3109

WDS 6th Orbit including measures of HDS3109

-- 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 HDS3109

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.168   309.70
--------------------------
2016.61    0.136   124.47
2016.70    0.140   124.66
2016.80    0.142   124.84
2016.90    0.145   125.01
2017.00    0.148   125.18
2017.10    0.150   125.34
2017.20    0.152   125.49
2017.30    0.154   125.65
2017.40    0.156   125.79
2017.50    0.158   125.94
2017.60    0.159   126.08
2017.70    0.160   126.22
2017.80    0.161   126.36
2017.90    0.162   126.50
2018.00    0.162   126.63
2018.10    0.162   126.77
2018.20    0.162   126.91
2018.30    0.161   127.04
2018.40    0.160   127.18
2018.50    0.159   127.32
2018.60    0.158   127.46
2018.70    0.156   127.61
2018.80    0.154   127.75
2018.90    0.152   127.91
2019.00    0.149   128.06
2019.10    0.146   128.23
2019.20    0.143   128.40
2019.30    0.139   128.58
2019.40    0.135   128.77
2019.50    0.131   128.97
2019.60    0.126   129.19
2019.70    0.121   129.42
2019.80    0.115   129.68
2019.90    0.110   129.96
2020.00    0.104   130.28
2020.10    0.097   130.63
2020.20    0.091   131.04
2020.30    0.084   131.51
2020.40    0.076   132.07
2020.50    0.069   132.74
2020.60    0.061   133.58
2020.70    0.054   134.66
2020.80    0.046   136.12
2020.90    0.038   138.19
2021.00    0.030   141.40
2021.10    0.022   147.02
2021.20    0.014   159.06
2021.30    0.008   193.11
2021.40    0.009   252.90
2021.50    0.016   279.39
2021.60    0.023   289.28
2021.70    0.031   294.16
2021.80    0.040   297.03
2021.90    0.048   298.93
2022.00    0.056   300.28
2022.10    0.063   301.30
2022.20    0.071   302.09
2022.30    0.078   302.73
2022.40    0.086   303.27
2022.50    0.093   303.71
2022.60    0.100   304.10
2022.70    0.106   304.44
2022.80    0.112   304.74
2022.90    0.119   305.00
2023.00    0.124   305.25
2023.10    0.130   305.47
2023.20    0.135   305.67
2023.30    0.140   305.86
2023.40    0.145   306.03
2023.50    0.149   306.20
2023.60    0.153   306.36
2023.70    0.157   306.50
2023.80    0.161   306.64
2023.90    0.164   306.78
2024.00    0.167   306.91
2024.10    0.170   307.03
2024.20    0.173   307.16
2024.30    0.175   307.27
2024.40    0.177   307.39
2024.50    0.179   307.50
2024.60    0.180   307.61
2024.70    0.181   307.72
2024.80    0.182   307.83
2024.90    0.183   307.94
2025.00    0.184   308.04
2025.10    0.184   308.15
2025.20    0.184   308.25
2025.30    0.184   308.36
2025.40    0.184   308.47
2025.50    0.183   308.57
2025.60    0.183   308.68
2025.70    0.182   308.79
2025.80    0.181   308.89
2025.90    0.179   309.00
2026.00    0.178   309.12
2026.10    0.176   309.23
2026.20    0.175   309.35
2026.30    0.173   309.46
2026.40    0.170   309.59
2026.50    0.168   309.71
2026.60    0.166   309.84
2026.70    0.163   309.97
2026.80    0.160   310.11
2026.90    0.158   310.25
2027.00    0.155   310.39
2027.10    0.152   310.55
2027.20    0.148   310.70
2027.30    0.145   310.87
2027.40    0.141   311.04
2027.50    0.138   311.23
2027.60    0.134   311.42
2027.70    0.130   311.62
2027.80    0.127   311.84
2027.90    0.123   312.07
2028.00    0.118   312.32
2028.10    0.114   312.58
2028.20    0.110   312.86
2028.30    0.106   313.17
2028.40    0.101   313.50
2028.50    0.097   313.87
2028.60    0.092   314.27
2028.70    0.088   314.71
2028.80    0.083   315.20
2028.90    0.078   315.75
2029.00    0.074   316.37
2029.10    0.069   317.07
2029.20    0.064   317.89
2029.30    0.059   318.83
2029.40    0.054   319.95
2029.50    0.049   321.29
2029.60    0.044   322.93
2029.70    0.039   324.98
2029.80    0.034   327.61
2029.90    0.030   331.10
2030.00    0.025   335.92
2030.10    0.021   342.87
2030.20    0.017   353.39
2030.30    0.013     9.57
2030.40    0.012    32.36
2030.50    0.013    56.89
2030.60    0.015    76.02
2030.70    0.019    88.69
2030.80    0.023    96.95
2030.90    0.028   102.55
2031.00    0.032   106.53
2031.10    0.037   109.49
2031.20    0.042   111.76
2031.30    0.047   113.57
2031.40    0.052   115.03
2031.50    0.057   116.23
2031.60    0.062   117.25
2031.70    0.067   118.12
2031.80    0.071   118.87
2031.90    0.076   119.53
2032.00    0.081   120.11
2032.10    0.085   120.63
2032.20    0.090   121.09
2032.30    0.094   121.51
2032.40    0.099   121.89
2032.50    0.103   122.25
2032.60    0.107   122.57
2032.70    0.111   122.87
2032.80    0.115   123.14
2032.90    0.119   123.40
2033.00    0.123   123.65
2033.10    0.127   123.87
2033.20    0.130   124.09
2033.30    0.134   124.30

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 18:32:42