Double Star Calculator - Orbit

Orbital Elements for HDS2908

WDS:	HDS2908	WDS ID/Discoverer
P:	12.699	Orbital period (years)
a:	0.1113	Semi-major axis (arcseconds)
i:	81.8	Inclination (degrees)
Ω:	107.9	Longitude of ascending node (degrees)
T:	2007.370	Epoch of periastron passage (year)
e:	0.536	Eccentricity
ω:	336.2	Longitude of periastron (degrees)
Start-Year:	2018.6505	Year
End-Year:	2031.3495	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2908
Position:	202143.04-363635.9	Epoch-2000 right ascension and declination
WDS-ID:	20217-3637	WDS designation
Discoverer Code:	HDS2908	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	193464	HD catalog number
Hipparcos number:	100417	Hipparcos catalog number
V1:	8.25	Magnitude of the primary
V2:	8.45	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 HDS2908

WDS 6th Orbit including measures of HDS2908

-- 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 HDS2908

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.158   284.44
--------------------------
2018.65    0.054   298.87
2018.75    0.048   300.51
2018.85    0.041   302.69
2018.95    0.034   305.76
2019.05    0.027   310.45
2019.15    0.020   318.50
2019.25    0.013   334.70
2019.35    0.009    10.30
2019.45    0.011    54.83
2019.55    0.017    78.24
2019.65    0.023    89.13
2019.75    0.030    95.16
2019.85    0.036    99.02
2019.95    0.042   101.79
2020.05    0.047   103.95
2020.15    0.050   105.75
2020.25    0.053   107.34
2020.35    0.054   108.83
2020.45    0.054   110.28
2020.55    0.053   111.74
2020.65    0.052   113.28
2020.75    0.049   114.94
2020.85    0.046   116.80
2020.95    0.043   118.94
2021.05    0.039   121.47
2021.15    0.035   124.55
2021.25    0.031   128.44
2021.35    0.027   133.51
2021.45    0.023   140.38
2021.55    0.019   149.95
2021.65    0.016   163.38
2021.75    0.015   181.23
2021.85    0.015   201.47
2021.95    0.016   219.82
2022.05    0.019   233.83
2022.15    0.023   243.80
2022.25    0.027   250.90
2022.35    0.031   256.08
2022.45    0.035   259.99
2022.55    0.040   263.02
2022.65    0.044   265.45
2022.75    0.049   267.43
2022.85    0.053   269.07
2022.95    0.057   270.47
2023.05    0.062   271.67
2023.15    0.066   272.71
2023.25    0.070   273.63
2023.35    0.074   274.44
2023.45    0.078   275.17
2023.55    0.082   275.83
2023.65    0.086   276.43
2023.75    0.090   276.97
2023.85    0.094   277.48
2023.95    0.097   277.94
2024.05    0.101   278.37
2024.15    0.104   278.78
2024.25    0.107   279.16
2024.35    0.111   279.51
2024.45    0.114   279.85
2024.55    0.117   280.16
2024.65    0.120   280.47
2024.75    0.123   280.75
2024.85    0.126   281.03
2024.95    0.128   281.29
2025.05    0.131   281.54
2025.15    0.133   281.78
2025.25    0.136   282.02
2025.35    0.138   282.24
2025.45    0.140   282.46
2025.55    0.143   282.67
2025.65    0.145   282.88
2025.75    0.146   283.08
2025.85    0.148   283.27
2025.95    0.150   283.46
2026.05    0.152   283.65
2026.15    0.153   283.83
2026.25    0.155   284.01
2026.35    0.156   284.18
2026.45    0.157   284.36
2026.55    0.158   284.53
2026.65    0.159   284.69
2026.75    0.160   284.86
2026.85    0.161   285.02
2026.95    0.162   285.19
2027.05    0.162   285.35
2027.15    0.163   285.51
2027.25    0.163   285.67
2027.35    0.163   285.83
2027.45    0.163   285.98
2027.55    0.163   286.14
2027.65    0.163   286.30
2027.75    0.163   286.46
2027.85    0.163   286.62
2027.95    0.162   286.78
2028.05    0.162   286.94
2028.15    0.161   287.10
2028.25    0.160   287.27
2028.35    0.159   287.44
2028.45    0.158   287.60
2028.55    0.157   287.77
2028.65    0.155   287.95
2028.75    0.154   288.13
2028.85    0.152   288.31
2028.95    0.150   288.49
2029.05    0.148   288.68
2029.15    0.146   288.88
2029.25    0.144   289.08
2029.35    0.142   289.28
2029.45    0.139   289.50
2029.55    0.136   289.72
2029.65    0.133   289.95
2029.75    0.130   290.20
2029.85    0.127   290.45
2029.95    0.124   290.72
2030.05    0.120   291.01
2030.15    0.116   291.31
2030.25    0.112   291.63
2030.35    0.108   291.98
2030.45    0.104   292.36
2030.55    0.099   292.77
2030.65    0.094   293.23
2030.75    0.089   293.73
2030.85    0.084   294.29
2030.95    0.078   294.94
2031.05    0.073   295.68
2031.15    0.067   296.55
2031.25    0.061   297.59

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 18:14:34