Double Star Calculator - Orbit

Orbital Elements for I1391
WDS: I1391 WDS ID/Discoverer
P: 48.750 Orbital period (years)
a: 0.1869 Semi-major axis (arcseconds)
i: 52.3 Inclination (degrees)
Ω: 123.4 Longitude of ascending node (degrees)
T: 2003.880 Epoch of periastron passage (year)
e: 0.505 Eccentricity
ω: 194.7 Longitude of periastron (degrees)
Start-Year: 2000.625 Year
End-Year: 2049.375 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I1391
Position: 190358.43-380402.0 Epoch-2000 right ascension and declination
WDS-ID: 19040-3804 WDS designation
Discoverer Code: I1391 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 176891 HD catalog number
Hipparcos number: 93625 Hipparcos catalog number
V1: 9.91 Magnitude of the primary
V2: 9.71 Magnitude of the secondary
Equinox: 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: Tok2024c Reference

Double Star Orbit for I1391



WDS 6th Orbit including measures of I1391

-- 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 I1391
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.278   129.40
--------------------------
2000.62    0.090   261.29
2000.72    0.090   262.96
2000.82    0.091   264.63
2000.92    0.091   266.28
2001.02    0.091   267.92
2001.12    0.092   269.56
2001.22    0.092   271.18
2001.32    0.092   272.78
2001.42    0.092   274.38
2001.52    0.093   275.97
2001.62    0.093   277.55
2001.72    0.093   279.12
2001.82    0.094   280.68
2001.92    0.094   282.23
2002.02    0.094   283.77
2002.12    0.094   285.30
2002.22    0.094   286.83
2002.32    0.095   288.36
2002.42    0.095   289.88
2002.52    0.095   291.39
2002.62    0.095   292.91
2002.72    0.095   294.43
2002.82    0.095   295.95
2002.92    0.095   297.47
2003.02    0.094   299.00
2003.12    0.094   300.53
2003.22    0.094   302.07
2003.32    0.093   303.62
2003.42    0.093   305.19
2003.52    0.093   306.77
2003.62    0.092   308.36
2003.72    0.092   309.97
2003.82    0.091   311.61
2003.92    0.090   313.26
2004.02    0.090   314.94
2004.12    0.089   316.65
2004.22    0.088   318.39
2004.32    0.087   320.16
2004.42    0.086   321.97
2004.52    0.086   323.81
2004.62    0.085   325.69
2004.72    0.084   327.61
2004.82    0.083   329.58
2004.92    0.082   331.59
2005.02    0.081   333.65
2005.12    0.080   335.75
2005.22    0.079   337.91
2005.32    0.078   340.11
2005.42    0.077   342.36
2005.52    0.077   344.66
2005.62    0.076   347.01
2005.72    0.075   349.41
2005.82    0.074   351.85
2005.92    0.074   354.34
2006.02    0.073   356.86
2006.12    0.073   359.41
2006.22    0.072     2.00
2006.32    0.072     4.61
2006.42    0.072     7.23
2006.52    0.072     9.87
2006.62    0.072    12.51
2006.72    0.072    15.15
2006.82    0.072    17.77
2006.92    0.072    20.38
2007.02    0.073    22.97
2007.12    0.073    25.52
2007.22    0.074    28.04
2007.32    0.075    30.51
2007.42    0.075    32.93
2007.52    0.076    35.31
2007.62    0.077    37.63
2007.72    0.078    39.89
2007.82    0.079    42.09
2007.92    0.080    44.22
2008.02    0.082    46.29
2008.12    0.083    48.30
2008.22    0.084    50.25
2008.32    0.086    52.13
2008.42    0.087    53.95
2008.52    0.089    55.71
2008.62    0.090    57.41
2008.72    0.092    59.04
2008.82    0.094    60.63
2008.92    0.095    62.15
2009.02    0.097    63.62
2009.12    0.099    65.04
2009.22    0.101    66.42
2009.32    0.102    67.74
2009.42    0.104    69.02
2009.52    0.106    70.25
2009.62    0.108    71.44
2009.72    0.110    72.60
2009.82    0.112    73.71
2009.92    0.113    74.79
2010.02    0.115    75.83
2010.12    0.117    76.84
2010.22    0.119    77.81
2010.32    0.121    78.76
2010.42    0.123    79.67
2010.52    0.125    80.56
2010.62    0.127    81.42
2010.72    0.129    82.26
2010.82    0.130    83.07
2010.92    0.132    83.86
2011.02    0.134    84.63
2011.12    0.136    85.37
2011.22    0.138    86.10
2011.32    0.140    86.80
2011.42    0.142    87.49
2011.52    0.144    88.16
2011.62    0.145    88.81
2011.72    0.147    89.45
2011.82    0.149    90.07
2011.92    0.151    90.67
2012.02    0.153    91.27
2012.12    0.155    91.84
2012.22    0.156    92.41
2012.32    0.158    92.96
2012.42    0.160    93.50
2012.52    0.162    94.02
2012.62    0.163    94.54
2012.72    0.165    95.04
2012.82    0.167    95.54
2012.92    0.169    96.02
2013.02    0.170    96.50
2013.12    0.172    96.96
2013.22    0.174    97.42
2013.32    0.175    97.87
2013.42    0.177    98.31
2013.52    0.179    98.74
2013.62    0.180    99.16
2013.72    0.182    99.58
2013.82    0.183    99.98
2013.92    0.185   100.39
2014.02    0.186   100.78
2014.12    0.188   101.17
2014.22    0.190   101.55
2014.32    0.191   101.93
2014.42    0.193   102.30
2014.52    0.194   102.66
2014.62    0.196   103.02
2014.72    0.197   103.37
2014.82    0.199   103.72
2014.92    0.200   104.06
2015.02    0.201   104.40
2015.12    0.203   104.74
2015.22    0.204   105.07
2015.32    0.206   105.39
2015.42    0.207   105.71
2015.52    0.208   106.03
2015.62    0.210   106.34
2015.72    0.211   106.64
2015.82    0.212   106.95
2015.92    0.214   107.25
2016.02    0.215   107.55
2016.12    0.216   107.84
2016.22    0.217   108.13
2016.32    0.219   108.42
2016.42    0.220   108.70
2016.52    0.221   108.98
2016.62    0.222   109.26
2016.72    0.223   109.53
2016.82    0.225   109.80
2016.92    0.226   110.07
2017.02    0.227   110.33
2017.12    0.228   110.60
2017.22    0.229   110.86
2017.32    0.230   111.12
2017.42    0.231   111.37
2017.52    0.233   111.62
2017.62    0.234   111.88
2017.72    0.235   112.12
2017.82    0.236   112.37
2017.92    0.237   112.61
2018.02    0.238   112.86
2018.12    0.239   113.10
2018.22    0.240   113.33
2018.32    0.241   113.57
2018.42    0.242   113.80
2018.52    0.243   114.04
2018.62    0.243   114.27
2018.72    0.244   114.50
2018.82    0.245   114.72
2018.92    0.246   114.95
2019.02    0.247   115.17
2019.12    0.248   115.39
2019.22    0.249   115.62
2019.32    0.250   115.83
2019.42    0.250   116.05
2019.52    0.251   116.27
2019.62    0.252   116.48
2019.72    0.253   116.70
2019.82    0.254   116.91
2019.92    0.254   117.12
2020.02    0.255   117.33
2020.12    0.256   117.54
2020.22    0.257   117.75
2020.32    0.257   117.95
2020.42    0.258   118.16
2020.52    0.259   118.36
2020.62    0.259   118.56
2020.72    0.260   118.77
2020.82    0.261   118.97
2020.92    0.261   119.17
2021.02    0.262   119.37
2021.12    0.263   119.56
2021.22    0.263   119.76
2021.32    0.264   119.96
2021.42    0.264   120.15
2021.52    0.265   120.35
2021.62    0.265   120.54
2021.72    0.266   120.73
2021.82    0.266   120.93
2021.92    0.267   121.12
2022.02    0.267   121.31
2022.12    0.268   121.50
2022.22    0.268   121.69
2022.32    0.269   121.88
2022.42    0.269   122.06
2022.52    0.270   122.25
2022.62    0.270   122.44
2022.72    0.271   122.63
2022.82    0.271   122.81
2022.92    0.271   123.00
2023.02    0.272   123.18
2023.12    0.272   123.36
2023.22    0.272   123.55
2023.32    0.273   123.73
2023.42    0.273   123.91
2023.52    0.273   124.10
2023.62    0.274   124.28
2023.72    0.274   124.46
2023.82    0.274   124.64
2023.92    0.275   124.82
2024.02    0.275   125.00
2024.12    0.275   125.18
2024.22    0.275   125.36
2024.32    0.276   125.54
2024.42    0.276   125.72
2024.52    0.276   125.90
2024.62    0.276   126.08
2024.72    0.276   126.26
2024.82    0.277   126.43
2024.92    0.277   126.61
2025.02    0.277   126.79
2025.12    0.277   126.97
2025.22    0.277   127.14
2025.32    0.277   127.32
2025.42    0.277   127.50
2025.52    0.277   127.68
2025.62    0.277   127.85
2025.72    0.278   128.03
2025.82    0.278   128.21
2025.92    0.278   128.38
2026.02    0.278   128.56
2026.12    0.278   128.74
2026.22    0.278   128.91
2026.32    0.278   129.09
2026.42    0.278   129.27
2026.52    0.278   129.44
2026.62    0.278   129.62
2026.72    0.278   129.80
2026.82    0.278   129.97
2026.92    0.277   130.15
2027.02    0.277   130.33
2027.12    0.277   130.50
2027.22    0.277   130.68
2027.32    0.277   130.86
2027.42    0.277   131.03
2027.52    0.277   131.21
2027.62    0.277   131.39
2027.72    0.277   131.57
2027.82    0.276   131.75
2027.92    0.276   131.92
2028.02    0.276   132.10
2028.12    0.276   132.28
2028.22    0.276   132.46
2028.32    0.275   132.64
2028.42    0.275   132.82
2028.52    0.275   133.00
2028.62    0.275   133.18
2028.72    0.274   133.36
2028.82    0.274   133.54
2028.92    0.274   133.72
2029.02    0.274   133.90
2029.12    0.273   134.09
2029.22    0.273   134.27
2029.32    0.273   134.45
2029.42    0.272   134.64
2029.52    0.272   134.82
2029.62    0.272   135.00
2029.72    0.271   135.19
2029.82    0.271   135.37
2029.92    0.270   135.56
2030.02    0.270   135.75
2030.12    0.270   135.93
2030.22    0.269   136.12
2030.32    0.269   136.31
2030.42    0.268   136.50
2030.52    0.268   136.69
2030.62    0.267   136.88
2030.72    0.267   137.07
2030.82    0.266   137.26
2030.92    0.266   137.45
2031.02    0.265   137.64
2031.12    0.265   137.84
2031.22    0.264   138.03
2031.32    0.264   138.23
2031.42    0.263   138.42
2031.52    0.263   138.62
2031.62    0.262   138.82
2031.72    0.262   139.02
2031.82    0.261   139.21
2031.92    0.261   139.41
2032.02    0.260   139.62
2032.12    0.259   139.82
2032.22    0.259   140.02
2032.32    0.258   140.22
2032.42    0.257   140.43
2032.52    0.257   140.64
2032.62    0.256   140.84
2032.72    0.255   141.05
2032.82    0.255   141.26
2032.92    0.254   141.47
2033.02    0.253   141.68
2033.12    0.253   141.90
2033.22    0.252   142.11
2033.32    0.251   142.32
2033.42    0.250   142.54
2033.52    0.250   142.76
2033.62    0.249   142.98
2033.72    0.248   143.20
2033.82    0.247   143.42
2033.92    0.247   143.64
2034.02    0.246   143.87
2034.12    0.245   144.10
2034.22    0.244   144.32
2034.32    0.243   144.55
2034.42    0.242   144.78
2034.52    0.242   145.02
2034.62    0.241   145.25
2034.72    0.240   145.49
2034.82    0.239   145.72
2034.92    0.238   145.96
2035.02    0.237   146.20
2035.12    0.236   146.45
2035.22    0.235   146.69
2035.32    0.234   146.94
2035.42    0.233   147.19
2035.52    0.232   147.44
2035.62    0.232   147.69
2035.72    0.231   147.95
2035.82    0.230   148.20
2035.92    0.229   148.46
2036.02    0.228   148.73
2036.12    0.227   148.99
2036.22    0.226   149.26
2036.32    0.225   149.52
2036.42    0.224   149.80
2036.52    0.222   150.07
2036.62    0.221   150.35
2036.72    0.220   150.63
2036.82    0.219   150.91
2036.92    0.218   151.19
2037.02    0.217   151.48
2037.12    0.216   151.77
2037.22    0.215   152.06
2037.32    0.214   152.36
2037.42    0.213   152.66
2037.52    0.212   152.96
2037.62    0.210   153.27
2037.72    0.209   153.58
2037.82    0.208   153.89
2037.92    0.207   154.20
2038.02    0.206   154.52
2038.12    0.205   154.85
2038.22    0.203   155.17
2038.32    0.202   155.50
2038.42    0.201   155.84
2038.52    0.200   156.18
2038.62    0.199   156.52
2038.72    0.197   156.87
2038.82    0.196   157.22
2038.92    0.195   157.58
2039.02    0.194   157.94
2039.12    0.192   158.30
2039.22    0.191   158.67
2039.32    0.190   159.05
2039.42    0.189   159.43
2039.52    0.187   159.81
2039.62    0.186   160.21
2039.72    0.185   160.60
2039.82    0.183   161.00
2039.92    0.182   161.41
2040.02    0.181   161.83
2040.12    0.179   162.24
2040.22    0.178   162.67
2040.32    0.177   163.10
2040.42    0.175   163.54
2040.52    0.174   163.99
2040.62    0.173   164.44
2040.72    0.171   164.90
2040.82    0.170   165.37
2040.92    0.169   165.84
2041.02    0.167   166.33
2041.12    0.166   166.82
2041.22    0.165   167.32
2041.32    0.163   167.82
2041.42    0.162   168.34
2041.52    0.160   168.86
2041.62    0.159   169.40
2041.72    0.158   169.94
2041.82    0.156   170.50
2041.92    0.155   171.06
2042.02    0.153   171.63
2042.12    0.152   172.22
2042.22    0.151   172.81
2042.32    0.149   173.42
2042.42    0.148   174.04
2042.52    0.146   174.67
2042.62    0.145   175.31
2042.72    0.143   175.97
2042.82    0.142   176.63
2042.92    0.141   177.31
2043.02    0.139   178.01
2043.12    0.138   178.72
2043.22    0.136   179.44
2043.32    0.135   180.18
2043.42    0.134   180.93
2043.52    0.132   181.70
2043.62    0.131   182.49
2043.72    0.130   183.29
2043.82    0.128   184.11
2043.92    0.127   184.95
2044.02    0.125   185.80
2044.12    0.124   186.68
2044.22    0.123   187.57
2044.32    0.122   188.48
2044.42    0.120   189.42
2044.52    0.119   190.37
2044.62    0.118   191.34
2044.72    0.116   192.34
2044.82    0.115   193.35
2044.92    0.114   194.39
2045.02    0.113   195.45
2045.12    0.111   196.54
2045.22    0.110   197.65
2045.32    0.109   198.78
2045.42    0.108   199.93
2045.52    0.107   201.12
2045.62    0.106   202.32
2045.72    0.105   203.55
2045.82    0.104   204.81
2045.92    0.103   206.09
2046.02    0.102   207.39
2046.12    0.101   208.72
2046.22    0.100   210.08
2046.32    0.099   211.46
2046.42    0.098   212.87
2046.52    0.097   214.30
2046.62    0.096   215.75
2046.72    0.096   217.23
2046.82    0.095   218.73
2046.92    0.094   220.25
2047.02    0.094   221.80
2047.12    0.093   223.37
2047.22    0.092   224.95
2047.32    0.092   226.56
2047.42    0.091   228.18
2047.52    0.091   229.82
2047.62    0.091   231.47
2047.72    0.090   233.14
2047.82    0.090   234.82
2047.92    0.090   236.51
2048.02    0.089   238.20
2048.12    0.089   239.91
2048.22    0.089   241.62
2048.32    0.089   243.34
2048.42    0.089   245.06
2048.52    0.089   246.78
2048.62    0.089   248.51
2048.72    0.089   250.23
2048.82    0.089   251.94
2048.92    0.089   253.66
2049.02    0.089   255.37
2049.12    0.090   257.07
2049.22    0.090   258.76
2049.32    0.090   260.45






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 17:58:51



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