Double Star Calculator - Orbit

Orbital Elements for A2131AB

WDS:	A2131AB	WDS ID/Discoverer
P:	45.020	Orbital period (years)
a:	0.347	Semi-major axis (arcseconds)
i:	43.5	Inclination (degrees)
Ω:	162.1	Longitude of ascending node (degrees)
T:	1973.160	Epoch of periastron passage (year)
e:	0.475	Eccentricity
ω:	257.5	Longitude of periastron (degrees)
Start-Year:	2002.49	Year
End-Year:	2047.51	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2131AB
Position:	085455.99+261153.8	Epoch-2000 right ascension and declination
WDS-ID:	08549+2612	WDS designation
Discoverer Code:	A2131AB	Discover designation and components
ADS number:	7082	Aitken Double Star catalog
HD number:	76095	HD catalog number
Hipparcos number:	43766	Hipparcos catalog number
V1:	6.95	Magnitude of the primary
V2:	9.02	Magnitude of the secondary
Equinox:		Equinox
Date:	1997	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:	Msn2000a	Reference

Double Star Orbit for A2131AB

WDS 6th Orbit including measures of A2131AB

-- 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 A2131AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.348   176.17
--------------------------
2002.49    0.351   266.59
2002.59    0.351   267.08
2002.69    0.351   267.58
2002.79    0.350   268.08
2002.89    0.350   268.59
2002.99    0.349   269.09
2003.09    0.349   269.59
2003.19    0.349   270.10
2003.29    0.348   270.60
2003.39    0.348   271.11
2003.49    0.347   271.62
2003.59    0.347   272.13
2003.69    0.347   272.64
2003.79    0.346   273.15
2003.89    0.346   273.67
2003.99    0.345   274.18
2004.09    0.345   274.70
2004.19    0.345   275.21
2004.29    0.344   275.73
2004.39    0.344   276.25
2004.49    0.343   276.77
2004.59    0.343   277.29
2004.69    0.343   277.82
2004.79    0.342   278.34
2004.89    0.342   278.87
2004.99    0.341   279.39
2005.09    0.341   279.92
2005.19    0.341   280.45
2005.29    0.340   280.98
2005.39    0.340   281.51
2005.49    0.339   282.05
2005.59    0.339   282.58
2005.69    0.338   283.12
2005.79    0.338   283.65
2005.89    0.338   284.19
2005.99    0.337   284.73
2006.09    0.337   285.27
2006.19    0.336   285.82
2006.29    0.336   286.36
2006.39    0.335   286.91
2006.49    0.335   287.46
2006.59    0.334   288.00
2006.69    0.334   288.56
2006.79    0.333   289.11
2006.89    0.333   289.66
2006.99    0.332   290.22
2007.09    0.332   290.77
2007.19    0.331   291.33
2007.29    0.331   291.89
2007.39    0.330   292.46
2007.49    0.330   293.02
2007.59    0.329   293.59
2007.69    0.329   294.15
2007.79    0.328   294.72
2007.89    0.328   295.30
2007.99    0.327   295.87
2008.09    0.326   296.45
2008.19    0.326   297.02
2008.29    0.325   297.60
2008.39    0.325   298.19
2008.49    0.324   298.77
2008.59    0.323   299.36
2008.69    0.323   299.95
2008.79    0.322   300.54
2008.89    0.321   301.13
2008.99    0.321   301.73
2009.09    0.320   302.33
2009.19    0.319   302.93
2009.29    0.318   303.53
2009.39    0.318   304.14
2009.49    0.317   304.75
2009.59    0.316   305.36
2009.69    0.315   305.98
2009.79    0.315   306.60
2009.89    0.314   307.22
2009.99    0.313   307.85
2010.09    0.312   308.48
2010.19    0.311   309.11
2010.29    0.310   309.75
2010.39    0.309   310.39
2010.49    0.308   311.03
2010.59    0.307   311.68
2010.69    0.306   312.34
2010.79    0.305   312.99
2010.89    0.304   313.65
2010.99    0.303   314.32
2011.09    0.302   314.99
2011.19    0.301   315.67
2011.29    0.300   316.35
2011.39    0.299   317.04
2011.49    0.297   317.73
2011.59    0.296   318.43
2011.69    0.295   319.13
2011.79    0.293   319.84
2011.89    0.292   320.56
2011.99    0.291   321.28
2012.09    0.289   322.01
2012.19    0.288   322.75
2012.29    0.286   323.50
2012.39    0.285   324.25
2012.49    0.283   325.01
2012.59    0.282   325.78
2012.69    0.280   326.56
2012.79    0.278   327.35
2012.89    0.277   328.15
2012.99    0.275   328.96
2013.09    0.273   329.78
2013.19    0.271   330.61
2013.29    0.269   331.45
2013.39    0.267   332.30
2013.49    0.265   333.17
2013.59    0.263   334.05
2013.69    0.261   334.94
2013.79    0.259   335.85
2013.89    0.257   336.78
2013.99    0.254   337.72
2014.09    0.252   338.68
2014.19    0.250   339.66
2014.29    0.247   340.65
2014.39    0.245   341.67
2014.49    0.242   342.70
2014.59    0.240   343.76
2014.69    0.237   344.85
2014.79    0.234   345.95
2014.89    0.231   347.09
2014.99    0.229   348.25
2015.09    0.226   349.44
2015.19    0.223   350.67
2015.29    0.220   351.92
2015.39    0.217   353.22
2015.49    0.213   354.54
2015.59    0.210   355.91
2015.69    0.207   357.33
2015.79    0.204   358.78
2015.89    0.201     0.29
2015.99    0.197     1.84
2016.09    0.194     3.45
2016.19    0.190     5.11
2016.29    0.187     6.84
2016.39    0.184     8.63
2016.49    0.180    10.49
2016.59    0.177    12.42
2016.69    0.173    14.42
2016.79    0.170    16.51
2016.89    0.167    18.68
2016.99    0.163    20.94
2017.09    0.160    23.29
2017.19    0.157    25.73
2017.29    0.154    28.27
2017.39    0.151    30.91
2017.49    0.148    33.65
2017.59    0.146    36.49
2017.69    0.143    39.43
2017.79    0.141    42.46
2017.89    0.139    45.59
2017.99    0.137    48.80
2018.09    0.136    52.09
2018.19    0.135    55.44
2018.29    0.134    58.85
2018.39    0.133    62.30
2018.49    0.133    65.77
2018.59    0.133    69.25
2018.69    0.133    72.72
2018.79    0.134    76.17
2018.89    0.135    79.57
2018.99    0.136    82.93
2019.09    0.138    86.21
2019.19    0.139    89.42
2019.29    0.141    92.55
2019.39    0.144    95.58
2019.49    0.146    98.51
2019.59    0.149   101.33
2019.69    0.152   104.06
2019.79    0.155   106.68
2019.89    0.158   109.20
2019.99    0.161   111.61
2020.09    0.165   113.93
2020.19    0.168   116.15
2020.29    0.172   118.28
2020.39    0.175   120.32
2020.49    0.179   122.28
2020.59    0.183   124.16
2020.69    0.187   125.96
2020.79    0.190   127.69
2020.89    0.194   129.35
2020.99    0.198   130.95
2021.09    0.202   132.48
2021.19    0.206   133.96
2021.29    0.209   135.39
2021.39    0.213   136.77
2021.49    0.217   138.09
2021.59    0.221   139.38
2021.69    0.224   140.62
2021.79    0.228   141.82
2021.89    0.232   142.98
2021.99    0.235   144.11
2022.09    0.239   145.20
2022.19    0.242   146.26
2022.29    0.246   147.29
2022.39    0.249   148.30
2022.49    0.253   149.27
2022.59    0.256   150.22
2022.69    0.259   151.15
2022.79    0.262   152.05
2022.89    0.266   152.93
2022.99    0.269   153.79
2023.09    0.272   154.64
2023.19    0.275   155.46
2023.29    0.278   156.26
2023.39    0.281   157.05
2023.49    0.284   157.82
2023.59    0.286   158.58
2023.69    0.289   159.32
2023.79    0.292   160.05
2023.89    0.295   160.77
2023.99    0.297   161.47
2024.09    0.300   162.16
2024.19    0.302   162.84
2024.29    0.305   163.51
2024.39    0.307   164.16
2024.49    0.310   164.81
2024.59    0.312   165.44
2024.69    0.314   166.07
2024.79    0.316   166.69
2024.89    0.319   167.30
2024.99    0.321   167.90
2025.09    0.323   168.49
2025.19    0.325   169.08
2025.29    0.327   169.66
2025.39    0.329   170.23
2025.49    0.331   170.79
2025.59    0.333   171.35
2025.69    0.335   171.90
2025.79    0.337   172.45
2025.89    0.338   172.99
2025.99    0.340   173.52
2026.09    0.342   174.05
2026.19    0.343   174.58
2026.29    0.345   175.09
2026.39    0.347   175.61
2026.49    0.348   176.12
2026.59    0.350   176.62
2026.69    0.351   177.12
2026.79    0.353   177.62
2026.89    0.354   178.11
2026.99    0.356   178.60
2027.09    0.357   179.08
2027.19    0.358   179.56
2027.29    0.360   180.04
2027.39    0.361   180.51
2027.49    0.362   180.98
2027.59    0.363   181.45
2027.69    0.365   181.91
2027.79    0.366   182.37
2027.89    0.367   182.83
2027.99    0.368   183.29
2028.09    0.369   183.74
2028.19    0.370   184.19
2028.29    0.371   184.64
2028.39    0.372   185.08
2028.49    0.373   185.52
2028.59    0.374   185.97
2028.69    0.375   186.40
2028.79    0.376   186.84
2028.89    0.377   187.27
2028.99    0.377   187.71
2029.09    0.378   188.14
2029.19    0.379   188.57
2029.29    0.380   188.99
2029.39    0.381   189.42
2029.49    0.381   189.84
2029.59    0.382   190.26
2029.69    0.383   190.68
2029.79    0.383   191.10
2029.89    0.384   191.52
2029.99    0.385   191.94
2030.09    0.385   192.35
2030.19    0.386   192.76
2030.29    0.386   193.18
2030.39    0.387   193.59
2030.49    0.387   194.00
2030.59    0.388   194.41
2030.69    0.388   194.81
2030.79    0.389   195.22
2030.89    0.389   195.63
2030.99    0.390   196.03
2031.09    0.390   196.44
2031.19    0.391   196.84
2031.29    0.391   197.24
2031.39    0.391   197.64
2031.49    0.392   198.04
2031.59    0.392   198.45
2031.69    0.392   198.85
2031.79    0.393   199.24
2031.89    0.393   199.64
2031.99    0.393   200.04
2032.09    0.393   200.44
2032.19    0.394   200.84
2032.29    0.394   201.23
2032.39    0.394   201.63
2032.49    0.394   202.02
2032.59    0.394   202.42
2032.69    0.395   202.81
2032.79    0.395   203.21
2032.89    0.395   203.60
2032.99    0.395   204.00
2033.09    0.395   204.39
2033.19    0.395   204.79
2033.29    0.395   205.18
2033.39    0.395   205.57
2033.49    0.395   205.97
2033.59    0.395   206.36
2033.69    0.395   206.75
2033.79    0.395   207.15
2033.89    0.395   207.54
2033.99    0.395   207.93
2034.09    0.395   208.32
2034.19    0.395   208.72
2034.29    0.395   209.11
2034.39    0.395   209.50
2034.49    0.395   209.90
2034.59    0.395   210.29
2034.69    0.395   210.68
2034.79    0.395   211.08
2034.89    0.395   211.47
2034.99    0.395   211.86
2035.09    0.395   212.26
2035.19    0.395   212.65
2035.29    0.395   213.05
2035.39    0.394   213.44
2035.49    0.394   213.84
2035.59    0.394   214.23
2035.69    0.394   214.63
2035.79    0.394   215.03
2035.89    0.394   215.42
2035.99    0.394   215.82
2036.09    0.393   216.22
2036.19    0.393   216.61
2036.29    0.393   217.01
2036.39    0.393   217.41
2036.49    0.393   217.81
2036.59    0.392   218.21
2036.69    0.392   218.61
2036.79    0.392   219.01
2036.89    0.392   219.41
2036.99    0.391   219.81
2037.09    0.391   220.21
2037.19    0.391   220.61
2037.29    0.391   221.01
2037.39    0.390   221.42
2037.49    0.390   221.82
2037.59    0.390   222.23
2037.69    0.389   222.63
2037.79    0.389   223.04
2037.89    0.389   223.44
2037.99    0.389   223.85
2038.09    0.388   224.26
2038.19    0.388   224.66
2038.29    0.388   225.07
2038.39    0.387   225.48
2038.49    0.387   225.89
2038.59    0.387   226.30
2038.69    0.386   226.71
2038.79    0.386   227.13
2038.89    0.386   227.54
2038.99    0.385   227.95
2039.09    0.385   228.37
2039.19    0.385   228.78
2039.29    0.384   229.20
2039.39    0.384   229.62
2039.49    0.384   230.03
2039.59    0.383   230.45
2039.69    0.383   230.87
2039.79    0.382   231.29
2039.89    0.382   231.71
2039.99    0.382   232.13
2040.09    0.381   232.55
2040.19    0.381   232.98
2040.29    0.381   233.40
2040.39    0.380   233.83
2040.49    0.380   234.25
2040.59    0.379   234.68
2040.69    0.379   235.11
2040.79    0.379   235.53
2040.89    0.378   235.96
2040.99    0.378   236.39
2041.09    0.377   236.82
2041.19    0.377   237.26
2041.29    0.377   237.69
2041.39    0.376   238.12
2041.49    0.376   238.56
2041.59    0.375   238.99
2041.69    0.375   239.43
2041.79    0.375   239.87
2041.89    0.374   240.30
2041.99    0.374   240.74
2042.09    0.373   241.18
2042.19    0.373   241.63
2042.29    0.373   242.07
2042.39    0.372   242.51
2042.49    0.372   242.96
2042.59    0.371   243.40
2042.69    0.371   243.85
2042.79    0.371   244.29
2042.89    0.370   244.74
2042.99    0.370   245.19
2043.09    0.369   245.64
2043.19    0.369   246.09
2043.29    0.368   246.54
2043.39    0.368   247.00
2043.49    0.368   247.45
2043.59    0.367   247.91
2043.69    0.367   248.36
2043.79    0.366   248.82
2043.89    0.366   249.28
2043.99    0.366   249.74
2044.09    0.365   250.20
2044.19    0.365   250.66
2044.29    0.364   251.12
2044.39    0.364   251.59
2044.49    0.364   252.05
2044.59    0.363   252.52
2044.69    0.363   252.98
2044.79    0.362   253.45
2044.89    0.362   253.92
2044.99    0.361   254.39
2045.09    0.361   254.86
2045.19    0.361   255.33
2045.29    0.360   255.81
2045.39    0.360   256.28
2045.49    0.359   256.76
2045.59    0.359   257.23
2045.69    0.359   257.71
2045.79    0.358   258.19
2045.89    0.358   258.67
2045.99    0.357   259.15
2046.09    0.357   259.63
2046.19    0.357   260.11
2046.29    0.356   260.60
2046.39    0.356   261.08
2046.49    0.355   261.57
2046.59    0.355   262.05
2046.69    0.355   262.54
2046.79    0.354   263.03
2046.89    0.354   263.52
2046.99    0.353   264.01
2047.09    0.353   264.51
2047.19    0.353   265.00
2047.29    0.352   265.49
2047.39    0.352   265.99
2047.49    0.351   266.49

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 16:12:29