Double Star Calculator - Orbit

Orbital Elements for HDO296AB

WDS:	HDO296AB	WDS ID/Discoverer
P:	27.940	Orbital period (years)
a:	0.276	Semi-major axis (arcseconds)
i:	83.2	Inclination (degrees)
Ω:	282.0	Longitude of ascending node (degrees)
T:	1997.590	Epoch of periastron passage (year)
e:	0.42	Eccentricity
ω:	41.4	Longitude of periastron (degrees)
Start-Year:	2011.03	Year
End-Year:	2038.97	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDO296AB
Position:	215511.34-615311.0	Epoch-2000 right ascension and declination
WDS-ID:	21552-6153	WDS designation
Discoverer Code:	HDO296AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	207964	HD catalog number
Hipparcos number:	108195	Hipparcos catalog number
V1:	6.6	Magnitude of the primary
V2:	6.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2015c	Reference

Double Star Orbit for HDO296AB

WDS 6th Orbit including measures of HDO296AB

-- 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 HDO296AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.050   304.50
--------------------------
2011.03    0.308   107.35
2011.13    0.306   107.46
2011.23    0.304   107.57
2011.33    0.301   107.69
2011.43    0.299   107.80
2011.53    0.296   107.92
2011.63    0.294   108.04
2011.73    0.291   108.17
2011.83    0.288   108.29
2011.93    0.286   108.42
2012.03    0.283   108.55
2012.13    0.280   108.68
2012.23    0.277   108.82
2012.33    0.274   108.96
2012.43    0.271   109.10
2012.53    0.268   109.25
2012.63    0.265   109.39
2012.73    0.262   109.55
2012.83    0.259   109.70
2012.93    0.256   109.86
2013.03    0.253   110.02
2013.13    0.249   110.19
2013.23    0.246   110.36
2013.33    0.243   110.54
2013.43    0.239   110.72
2013.53    0.236   110.91
2013.63    0.232   111.10
2013.73    0.229   111.30
2013.83    0.225   111.51
2013.93    0.221   111.72
2014.03    0.218   111.94
2014.13    0.214   112.16
2014.23    0.210   112.40
2014.33    0.207   112.64
2014.43    0.203   112.89
2014.53    0.199   113.15
2014.63    0.195   113.42
2014.73    0.191   113.71
2014.83    0.187   114.00
2014.93    0.183   114.31
2015.03    0.179   114.63
2015.13    0.175   114.97
2015.23    0.171   115.32
2015.33    0.167   115.69
2015.43    0.163   116.07
2015.53    0.159   116.48
2015.63    0.155   116.91
2015.73    0.150   117.37
2015.83    0.146   117.85
2015.93    0.142   118.35
2016.03    0.138   118.89
2016.13    0.133   119.47
2016.23    0.129   120.08
2016.33    0.125   120.74
2016.43    0.120   121.44
2016.53    0.116   122.19
2016.63    0.112   123.00
2016.73    0.107   123.88
2016.83    0.103   124.83
2016.93    0.099   125.87
2017.03    0.095   126.99
2017.13    0.090   128.23
2017.23    0.086   129.59
2017.33    0.082   131.09
2017.43    0.077   132.76
2017.53    0.073   134.62
2017.63    0.069   136.70
2017.73    0.065   139.03
2017.83    0.061   141.67
2017.93    0.058   144.65
2018.03    0.054   148.05
2018.13    0.051   151.92
2018.23    0.047   156.33
2018.33    0.045   161.33
2018.43    0.042   166.97
2018.53    0.040   173.25
2018.63    0.038   180.12
2018.73    0.038   187.44
2018.83    0.037   195.01
2018.93    0.038   202.58
2019.03    0.038   209.90
2019.13    0.040   216.77
2019.23    0.042   223.05
2019.33    0.045   228.69
2019.43    0.047   233.70
2019.53    0.051   238.11
2019.63    0.054   241.99
2019.73    0.057   245.39
2019.83    0.061   248.39
2019.93    0.065   251.04
2020.03    0.069   253.39
2020.13    0.073   255.48
2020.23    0.077   257.35
2020.33    0.081   259.03
2020.43    0.085   260.55
2020.53    0.090   261.93
2020.63    0.094   263.18
2020.73    0.098   264.33
2020.83    0.102   265.39
2020.93    0.106   266.36
2021.03    0.110   267.27
2021.13    0.114   268.11
2021.23    0.118   268.89
2021.33    0.122   269.62
2021.43    0.126   270.30
2021.53    0.130   270.95
2021.63    0.133   271.56
2021.73    0.137   272.14
2021.83    0.141   272.68
2021.93    0.144   273.21
2022.03    0.147   273.70
2022.13    0.151   274.18
2022.23    0.154   274.63
2022.33    0.157   275.07
2022.43    0.159   275.50
2022.53    0.162   275.90
2022.63    0.164   276.30
2022.73    0.167   276.68
2022.83    0.169   277.06
2022.93    0.171   277.42
2023.03    0.173   277.78
2023.13    0.174   278.13
2023.23    0.175   278.48
2023.33    0.177   278.82
2023.43    0.177   279.15
2023.53    0.178   279.49
2023.63    0.178   279.82
2023.73    0.178   280.15
2023.83    0.178   280.48
2023.93    0.177   280.82
2024.03    0.176   281.15
2024.13    0.175   281.50
2024.23    0.174   281.84
2024.33    0.172   282.20
2024.43    0.169   282.56
2024.53    0.167   282.93
2024.63    0.164   283.32
2024.73    0.161   283.72
2024.83    0.157   284.14
2024.93    0.153   284.58
2025.03    0.148   285.04
2025.13    0.143   285.54
2025.23    0.138   286.07
2025.33    0.133   286.65
2025.43    0.127   287.27
2025.53    0.121   287.96
2025.63    0.114   288.72
2025.73    0.108   289.58
2025.83    0.101   290.56
2025.93    0.093   291.68
2026.03    0.086   292.99
2026.13    0.078   294.55
2026.23    0.071   296.45
2026.33    0.063   298.81
2026.43    0.055   301.83
2026.53    0.048   305.82
2026.63    0.040   311.33
2026.73    0.033   319.25
2026.83    0.027   331.05
2026.93    0.023   348.49
2027.03    0.021    11.17
2027.13    0.023    33.60
2027.23    0.027    50.60
2027.33    0.034    62.05
2027.43    0.041    69.74
2027.53    0.048    75.09
2027.63    0.056    78.99
2027.73    0.064    81.93
2027.83    0.072    84.23
2027.93    0.080    86.07
2028.03    0.088    87.58
2028.13    0.095    88.84
2028.23    0.103    89.91
2028.33    0.111    90.84
2028.43    0.118    91.64
2028.53    0.126    92.35
2028.63    0.133    92.98
2028.73    0.140    93.54
2028.83    0.147    94.06
2028.93    0.154    94.52
2029.03    0.161    94.94
2029.13    0.168    95.33
2029.23    0.174    95.69
2029.33    0.181    96.03
2029.43    0.187    96.34
2029.53    0.193    96.63
2029.63    0.199    96.91
2029.73    0.205    97.17
2029.83    0.211    97.41
2029.93    0.216    97.64
2030.03    0.222    97.86
2030.13    0.227    98.07
2030.23    0.233    98.27
2030.33    0.238    98.46
2030.43    0.243    98.64
2030.53    0.247    98.82
2030.63    0.252    98.99
2030.73    0.257    99.15
2030.83    0.261    99.31
2030.93    0.266    99.46
2031.03    0.270    99.61
2031.13    0.274    99.75
2031.23    0.278    99.89
2031.33    0.282   100.02
2031.43    0.285   100.15
2031.53    0.289   100.28
2031.63    0.292   100.41
2031.73    0.296   100.53
2031.83    0.299   100.65
2031.93    0.302   100.76
2032.03    0.305   100.88
2032.13    0.308   100.99
2032.23    0.311   101.10
2032.33    0.314   101.21
2032.43    0.317   101.31
2032.53    0.319   101.42
2032.63    0.322   101.52
2032.73    0.324   101.62
2032.83    0.326   101.72
2032.93    0.328   101.82
2033.03    0.330   101.92
2033.13    0.332   102.01
2033.23    0.334   102.11
2033.33    0.336   102.20
2033.43    0.337   102.30
2033.53    0.339   102.39
2033.63    0.340   102.48
2033.73    0.342   102.57
2033.83    0.343   102.66
2033.93    0.344   102.75
2034.03    0.345   102.84
2034.13    0.346   102.93
2034.23    0.347   103.01
2034.33    0.348   103.10
2034.43    0.349   103.19
2034.53    0.350   103.28
2034.63    0.350   103.36
2034.73    0.351   103.45
2034.83    0.351   103.53
2034.93    0.352   103.62
2035.03    0.352   103.70
2035.13    0.352   103.79
2035.23    0.352   103.87
2035.33    0.352   103.96
2035.43    0.352   104.04
2035.53    0.352   104.13
2035.63    0.352   104.21
2035.73    0.352   104.30
2035.83    0.351   104.38
2035.93    0.351   104.47
2036.03    0.351   104.56
2036.13    0.350   104.64
2036.23    0.350   104.73
2036.33    0.349   104.81
2036.43    0.348   104.90
2036.53    0.347   104.99
2036.63    0.346   105.08
2036.73    0.346   105.16
2036.83    0.345   105.25
2036.93    0.343   105.34
2037.03    0.342   105.43
2037.13    0.341   105.52
2037.23    0.340   105.61
2037.33    0.339   105.70
2037.43    0.337   105.80
2037.53    0.336   105.89
2037.63    0.334   105.98
2037.73    0.333   106.08
2037.83    0.331   106.17
2037.93    0.329   106.27
2038.03    0.328   106.37
2038.13    0.326   106.47
2038.23    0.324   106.57
2038.33    0.322   106.67
2038.43    0.320   106.77
2038.53    0.318   106.87
2038.63    0.316   106.98
2038.73    0.314   107.09
2038.83    0.312   107.19
2038.93    0.309   107.30

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 18:34:14