Double Star Calculator - Orbit

Orbital Elements for I227AB
WDS: I227AB WDS ID/Discoverer
P: 41.610 Orbital period (years)
a: 0.2327 Semi-major axis (arcseconds)
i: 147.0 Inclination (degrees)
Ω: 99.5 Longitude of ascending node (degrees)
T: 1998.220 Epoch of periastron passage (year)
e: 0.916 Eccentricity
ω: 185.0 Longitude of periastron (degrees)
Start-Year: 2004.195 Year
End-Year: 2045.805 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I227AB
Position: 145630.78-343754.2 Epoch-2000 right ascension and declination
WDS-ID: 14565-3438 WDS designation
Discoverer Code: I227AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 131751 HD catalog number
Hipparcos number: 73108 Hipparcos catalog number
V1: 8.06 Magnitude of the primary
V2: 8.39 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2021 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: Tok2024b Reference

Double Star Orbit for I227AB



WDS 6th Orbit including measures of I227AB

-- 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 I227AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.405    88.97
--------------------------
2004.19    0.278   111.27
2004.29    0.280   111.07
2004.39    0.283   110.87
2004.49    0.286   110.68
2004.59    0.288   110.49
2004.69    0.291   110.30
2004.79    0.293   110.11
2004.89    0.296   109.93
2004.99    0.298   109.75
2005.09    0.300   109.58
2005.19    0.303   109.40
2005.29    0.305   109.23
2005.39    0.307   109.07
2005.49    0.310   108.90
2005.59    0.312   108.74
2005.69    0.314   108.58
2005.79    0.317   108.42
2005.89    0.319   108.26
2005.99    0.321   108.11
2006.09    0.323   107.96
2006.19    0.325   107.81
2006.29    0.327   107.66
2006.39    0.329   107.51
2006.49    0.331   107.37
2006.59    0.333   107.22
2006.69    0.335   107.08
2006.79    0.337   106.94
2006.89    0.339   106.81
2006.99    0.341   106.67
2007.09    0.343   106.53
2007.19    0.345   106.40
2007.29    0.347   106.27
2007.39    0.349   106.14
2007.49    0.350   106.01
2007.59    0.352   105.88
2007.69    0.354   105.76
2007.79    0.356   105.63
2007.89    0.357   105.51
2007.99    0.359   105.38
2008.09    0.361   105.26
2008.19    0.363   105.14
2008.29    0.364   105.02
2008.39    0.366   104.90
2008.49    0.367   104.79
2008.59    0.369   104.67
2008.69    0.371   104.56
2008.79    0.372   104.44
2008.89    0.374   104.33
2008.99    0.375   104.22
2009.09    0.377   104.10
2009.19    0.378   103.99
2009.29    0.380   103.88
2009.39    0.381   103.77
2009.49    0.382   103.67
2009.59    0.384   103.56
2009.69    0.385   103.45
2009.79    0.387   103.35
2009.89    0.388   103.24
2009.99    0.389   103.14
2010.09    0.391   103.03
2010.19    0.392   102.93
2010.29    0.393   102.83
2010.39    0.394   102.73
2010.49    0.396   102.63
2010.59    0.397   102.52
2010.69    0.398   102.43
2010.79    0.399   102.33
2010.89    0.400   102.23
2010.99    0.402   102.13
2011.09    0.403   102.03
2011.19    0.404   101.94
2011.29    0.405   101.84
2011.39    0.406   101.74
2011.49    0.407   101.65
2011.59    0.408   101.55
2011.69    0.409   101.46
2011.79    0.410   101.36
2011.89    0.411   101.27
2011.99    0.412   101.18
2012.09    0.413   101.09
2012.19    0.414   100.99
2012.29    0.415   100.90
2012.39    0.416   100.81
2012.49    0.417   100.72
2012.59    0.418   100.63
2012.69    0.419   100.54
2012.79    0.420   100.45
2012.89    0.420   100.36
2012.99    0.421   100.27
2013.09    0.422   100.18
2013.19    0.423   100.09
2013.29    0.424   100.01
2013.39    0.425    99.92
2013.49    0.425    99.83
2013.59    0.426    99.74
2013.69    0.427    99.66
2013.79    0.428    99.57
2013.89    0.428    99.49
2013.99    0.429    99.40
2014.09    0.430    99.31
2014.19    0.430    99.23
2014.29    0.431    99.14
2014.39    0.432    99.06
2014.49    0.432    98.97
2014.59    0.433    98.89
2014.69    0.433    98.81
2014.79    0.434    98.72
2014.89    0.434    98.64
2014.99    0.435    98.55
2015.09    0.436    98.47
2015.19    0.436    98.39
2015.29    0.437    98.31
2015.39    0.437    98.22
2015.49    0.438    98.14
2015.59    0.438    98.06
2015.69    0.438    97.98
2015.79    0.439    97.89
2015.89    0.439    97.81
2015.99    0.440    97.73
2016.09    0.440    97.65
2016.19    0.440    97.57
2016.29    0.441    97.49
2016.39    0.441    97.41
2016.49    0.441    97.33
2016.59    0.442    97.24
2016.69    0.442    97.16
2016.79    0.442    97.08
2016.89    0.443    97.00
2016.99    0.443    96.92
2017.09    0.443    96.84
2017.19    0.443    96.76
2017.29    0.444    96.68
2017.39    0.444    96.60
2017.49    0.444    96.52
2017.59    0.444    96.44
2017.69    0.444    96.36
2017.79    0.445    96.28
2017.89    0.445    96.20
2017.99    0.445    96.12
2018.09    0.445    96.04
2018.19    0.445    95.96
2018.29    0.445    95.88
2018.39    0.445    95.80
2018.49    0.445    95.72
2018.59    0.445    95.65
2018.69    0.445    95.57
2018.79    0.445    95.49
2018.89    0.445    95.41
2018.99    0.445    95.33
2019.09    0.445    95.25
2019.19    0.445    95.17
2019.29    0.445    95.09
2019.39    0.445    95.01
2019.49    0.445    94.93
2019.59    0.445    94.85
2019.69    0.445    94.77
2019.79    0.445    94.69
2019.89    0.445    94.61
2019.99    0.445    94.53
2020.09    0.444    94.45
2020.19    0.444    94.37
2020.29    0.444    94.29
2020.39    0.444    94.21
2020.49    0.444    94.13
2020.59    0.443    94.05
2020.69    0.443    93.97
2020.79    0.443    93.89
2020.89    0.443    93.81
2020.99    0.442    93.73
2021.09    0.442    93.65
2021.19    0.442    93.57
2021.29    0.441    93.49
2021.39    0.441    93.41
2021.49    0.441    93.33
2021.59    0.440    93.24
2021.69    0.440    93.16
2021.79    0.440    93.08
2021.89    0.439    93.00
2021.99    0.439    92.92
2022.09    0.438    92.84
2022.19    0.438    92.75
2022.29    0.437    92.67
2022.39    0.437    92.59
2022.49    0.436    92.51
2022.59    0.436    92.42
2022.69    0.435    92.34
2022.79    0.435    92.26
2022.89    0.434    92.17
2022.99    0.434    92.09
2023.09    0.433    92.01
2023.19    0.433    91.92
2023.29    0.432    91.84
2023.39    0.431    91.75
2023.49    0.431    91.67
2023.59    0.430    91.58
2023.69    0.430    91.50
2023.79    0.429    91.41
2023.89    0.428    91.33
2023.99    0.427    91.24
2024.09    0.427    91.16
2024.19    0.426    91.07
2024.29    0.425    90.98
2024.39    0.424    90.89
2024.49    0.424    90.81
2024.59    0.423    90.72
2024.69    0.422    90.63
2024.79    0.421    90.54
2024.89    0.420    90.45
2024.99    0.420    90.36
2025.09    0.419    90.27
2025.19    0.418    90.18
2025.29    0.417    90.09
2025.39    0.416    90.00
2025.49    0.415    89.91
2025.59    0.414    89.82
2025.69    0.413    89.73
2025.79    0.412    89.63
2025.89    0.411    89.54
2025.99    0.410    89.45
2026.09    0.409    89.35
2026.19    0.408    89.26
2026.29    0.407    89.17
2026.39    0.406    89.07
2026.49    0.405    88.97
2026.59    0.404    88.88
2026.69    0.403    88.78
2026.79    0.402    88.68
2026.89    0.401    88.59
2026.99    0.399    88.49
2027.09    0.398    88.39
2027.19    0.397    88.29
2027.29    0.396    88.19
2027.39    0.395    88.09
2027.49    0.393    87.99
2027.59    0.392    87.88
2027.69    0.391    87.78
2027.79    0.389    87.68
2027.89    0.388    87.57
2027.99    0.387    87.47
2028.09    0.386    87.36
2028.19    0.384    87.26
2028.29    0.383    87.15
2028.39    0.381    87.04
2028.49    0.380    86.93
2028.59    0.378    86.82
2028.69    0.377    86.71
2028.79    0.376    86.60
2028.89    0.374    86.49
2028.99    0.373    86.37
2029.09    0.371    86.26
2029.19    0.369    86.15
2029.29    0.368    86.03
2029.39    0.366    85.91
2029.49    0.365    85.79
2029.59    0.363    85.68
2029.69    0.361    85.56
2029.79    0.360    85.43
2029.89    0.358    85.31
2029.99    0.356    85.19
2030.09    0.355    85.06
2030.19    0.353    84.94
2030.29    0.351    84.81
2030.39    0.349    84.68
2030.49    0.348    84.55
2030.59    0.346    84.42
2030.69    0.344    84.29
2030.79    0.342    84.16
2030.89    0.340    84.02
2030.99    0.338    83.88
2031.09    0.336    83.74
2031.19    0.334    83.60
2031.29    0.332    83.46
2031.39    0.330    83.32
2031.49    0.328    83.17
2031.59    0.326    83.03
2031.69    0.324    82.88
2031.79    0.322    82.73
2031.89    0.320    82.57
2031.99    0.318    82.42
2032.09    0.316    82.26
2032.19    0.314    82.10
2032.29    0.311    81.94
2032.39    0.309    81.78
2032.49    0.307    81.61
2032.59    0.305    81.44
2032.69    0.302    81.27
2032.79    0.300    81.10
2032.89    0.297    80.92
2032.99    0.295    80.74
2033.09    0.293    80.56
2033.19    0.290    80.37
2033.29    0.288    80.18
2033.39    0.285    79.99
2033.49    0.283    79.80
2033.59    0.280    79.60
2033.69    0.277    79.39
2033.79    0.275    79.19
2033.89    0.272    78.98
2033.99    0.269    78.76
2034.09    0.267    78.54
2034.19    0.264    78.32
2034.29    0.261    78.09
2034.39    0.258    77.86
2034.49    0.255    77.62
2034.59    0.253    77.37
2034.69    0.250    77.12
2034.79    0.247    76.87
2034.89    0.244    76.60
2034.99    0.240    76.33
2035.09    0.237    76.06
2035.19    0.234    75.78
2035.29    0.231    75.48
2035.39    0.228    75.18
2035.49    0.225    74.88
2035.59    0.221    74.56
2035.69    0.218    74.23
2035.79    0.215    73.90
2035.89    0.211    73.55
2035.99    0.208    73.19
2036.09    0.204    72.81
2036.19    0.200    72.43
2036.29    0.197    72.03
2036.39    0.193    71.61
2036.49    0.189    71.18
2036.59    0.185    70.73
2036.69    0.182    70.27
2036.79    0.178    69.78
2036.89    0.174    69.27
2036.99    0.169    68.73
2037.09    0.165    68.17
2037.19    0.161    67.57
2037.29    0.157    66.95
2037.39    0.152    66.29
2037.49    0.148    65.59
2037.59    0.143    64.85
2037.69    0.139    64.06
2037.79    0.134    63.21
2037.89    0.129    62.30
2037.99    0.124    61.32
2038.09    0.119    60.25
2038.19    0.114    59.09
2038.29    0.109    57.82
2038.39    0.103    56.42
2038.49    0.098    54.86
2038.59    0.092    53.11
2038.69    0.086    51.12
2038.79    0.080    48.85
2038.89    0.074    46.19
2038.99    0.068    43.05
2039.09    0.061    39.24
2039.19    0.054    34.50
2039.29    0.048    28.41
2039.39    0.041    20.24
2039.49    0.034     8.72
2039.59    0.027   351.62
2039.69    0.022   325.71
2039.79    0.020   289.59
2039.89    0.020   248.59
2039.99    0.023   213.35
2040.09    0.029   189.61
2040.19    0.036   174.54
2040.29    0.043   164.50
2040.39    0.051   157.38
2040.49    0.058   152.04
2040.59    0.065   147.86
2040.69    0.072   144.48
2040.79    0.078   141.67
2040.89    0.085   139.29
2040.99    0.091   137.24
2041.09    0.097   135.44
2041.19    0.102   133.85
2041.29    0.108   132.43
2041.39    0.114   131.15
2041.49    0.119   129.98
2041.59    0.124   128.92
2041.69    0.129   127.94
2041.79    0.134   127.03
2041.89    0.139   126.18
2041.99    0.144   125.40
2042.09    0.149   124.66
2042.19    0.153   123.97
2042.29    0.158   123.32
2042.39    0.162   122.70
2042.49    0.166   122.12
2042.59    0.171   121.56
2042.69    0.175   121.03
2042.79    0.179   120.53
2042.89    0.183   120.05
2042.99    0.187   119.59
2043.09    0.191   119.15
2043.19    0.195   118.72
2043.29    0.199   118.32
2043.39    0.202   117.92
2043.49    0.206   117.55
2043.59    0.210   117.18
2043.69    0.213   116.83
2043.79    0.217   116.49
2043.89    0.220   116.15
2043.99    0.223   115.83
2044.09    0.227   115.52
2044.19    0.230   115.22
2044.29    0.233   114.93
2044.39    0.237   114.64
2044.49    0.240   114.36
2044.59    0.243   114.09
2044.69    0.246   113.83
2044.79    0.249   113.57
2044.89    0.252   113.32
2044.99    0.255   113.08
2045.09    0.258   112.84
2045.19    0.261   112.60
2045.29    0.264   112.37
2045.39    0.267   112.15
2045.49    0.269   111.93
2045.59    0.272   111.71
2045.69    0.275   111.50
2045.79    0.277   111.30






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 17:10:34



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