Double Star Calculator - Orbit

Orbital Elements for I65
WDS: I65 WDS ID/Discoverer
P: 16.770 Orbital period (years)
a: 0.207 Semi-major axis (arcseconds)
i: 33.8 Inclination (degrees)
Ω: 122.9 Longitude of ascending node (degrees)
T: 2009.200 Epoch of periastron passage (year)
e: 0.444 Eccentricity
ω: 246.9 Longitude of periastron (degrees)
Start-Year: 2016.615 Year
End-Year: 2033.385 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for I65
Position: 065717.61-353025.9 Epoch-2000 right ascension and declination
WDS-ID: 06573-3530 WDS designation
Discoverer Code: I65 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 51825 HD catalog number
Hipparcos number: 33451 Hipparcos catalog number
V1: 6.90 Magnitude of the primary
V2: 7.31 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2006 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: Doc2009g Reference

Double Star Orbit for I65



WDS 6th Orbit including measures of I65

-- 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 I65
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.101    43.49
--------------------------
2016.62    0.261   175.84
2016.71    0.261   176.85
2016.81    0.261   177.86
2016.91    0.260   178.87
2017.01    0.260   179.88
2017.11    0.259   180.90
2017.21    0.259   181.92
2017.31    0.258   182.94
2017.41    0.258   183.97
2017.51    0.257   185.00
2017.61    0.257   186.04
2017.71    0.256   187.08
2017.81    0.255   188.13
2017.91    0.255   189.19
2018.01    0.254   190.25
2018.11    0.253   191.31
2018.21    0.252   192.39
2018.31    0.251   193.47
2018.41    0.250   194.55
2018.51    0.250   195.65
2018.61    0.249   196.75
2018.71    0.248   197.86
2018.81    0.247   198.99
2018.91    0.246   200.12
2019.01    0.245   201.25
2019.11    0.244   202.40
2019.21    0.243   203.56
2019.31    0.241   204.73
2019.41    0.240   205.91
2019.51    0.239   207.10
2019.61    0.238   208.31
2019.71    0.237   209.52
2019.81    0.236   210.75
2019.91    0.234   211.99
2020.01    0.233   213.25
2020.11    0.232   214.51
2020.21    0.231   215.79
2020.31    0.229   217.09
2020.41    0.228   218.40
2020.51    0.227   219.73
2020.61    0.225   221.07
2020.71    0.224   222.43
2020.81    0.222   223.80
2020.91    0.221   225.20
2021.01    0.220   226.61
2021.11    0.218   228.04
2021.21    0.217   229.48
2021.31    0.215   230.95
2021.41    0.214   232.44
2021.51    0.212   233.95
2021.61    0.211   235.48
2021.71    0.209   237.04
2021.81    0.208   238.61
2021.91    0.206   240.22
2022.01    0.204   241.84
2022.11    0.203   243.50
2022.21    0.201   245.18
2022.31    0.199   246.88
2022.41    0.198   248.62
2022.51    0.196   250.39
2022.61    0.194   252.19
2022.71    0.192   254.03
2022.81    0.190   255.90
2022.91    0.189   257.81
2023.01    0.187   259.75
2023.11    0.185   261.74
2023.21    0.183   263.77
2023.31    0.180   265.85
2023.41    0.178   267.98
2023.51    0.176   270.17
2023.61    0.174   272.41
2023.71    0.171   274.71
2023.81    0.169   277.08
2023.91    0.166   279.52
2024.01    0.164   282.04
2024.11    0.161   284.64
2024.21    0.158   287.33
2024.31    0.155   290.13
2024.41    0.152   293.04
2024.51    0.149   296.07
2024.61    0.145   299.24
2024.71    0.142   302.56
2024.81    0.138   306.05
2024.91    0.135   309.72
2025.01    0.131   313.61
2025.11    0.127   317.73
2025.21    0.123   322.12
2025.31    0.119   326.78
2025.41    0.115   331.77
2025.51    0.112   337.09
2025.61    0.108   342.76
2025.71    0.105   348.80
2025.81    0.102   355.19
2025.91    0.100     1.91
2026.01    0.098     8.90
2026.11    0.097    16.08
2026.21    0.097    23.34
2026.31    0.098    30.57
2026.41    0.099    37.66
2026.51    0.101    44.50
2026.61    0.104    51.01
2026.71    0.107    57.15
2026.81    0.111    62.89
2026.91    0.115    68.23
2027.01    0.120    73.18
2027.11    0.125    77.76
2027.21    0.130    81.99
2027.31    0.135    85.92
2027.41    0.140    89.56
2027.51    0.145    92.95
2027.61    0.150    96.11
2027.71    0.155    99.07
2027.81    0.159   101.85
2027.91    0.164   104.47
2028.01    0.169   106.94
2028.11    0.173   109.28
2028.21    0.178   111.50
2028.31    0.182   113.62
2028.41    0.186   115.64
2028.51    0.190   117.58
2028.61    0.194   119.43
2028.71    0.198   121.22
2028.81    0.201   122.94
2028.91    0.205   124.60
2029.01    0.208   126.21
2029.11    0.211   127.76
2029.21    0.214   129.27
2029.31    0.217   130.74
2029.41    0.220   132.17
2029.51    0.223   133.57
2029.61    0.226   134.93
2029.71    0.228   136.26
2029.81    0.230   137.57
2029.91    0.233   138.84
2030.01    0.235   140.10
2030.11    0.237   141.33
2030.21    0.239   142.54
2030.31    0.241   143.73
2030.41    0.242   144.90
2030.51    0.244   146.06
2030.61    0.246   147.20
2030.71    0.247   148.33
2030.81    0.249   149.44
2030.91    0.250   150.54
2031.01    0.251   151.63
2031.11    0.252   152.71
2031.21    0.253   153.78
2031.31    0.254   154.85
2031.41    0.255   155.90
2031.51    0.256   156.95
2031.61    0.257   157.98
2031.71    0.258   159.02
2031.81    0.258   160.05
2031.91    0.259   161.07
2032.01    0.260   162.09
2032.11    0.260   163.10
2032.21    0.260   164.11
2032.31    0.261   165.12
2032.41    0.261   166.13
2032.51    0.261   167.13
2032.61    0.261   168.13
2032.71    0.262   169.13
2032.81    0.262   170.14
2032.91    0.262   171.14
2033.01    0.262   172.14
2033.11    0.262   173.14
2033.21    0.261   174.14
2033.31    0.261   175.14



 

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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 15:52:55


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