Double Star Calculator - Orbit

Orbital Elements for MEL7
WDS: MEL7 WDS ID/Discoverer
P: 47.000 Orbital period (years)
a: 0.297 Semi-major axis (arcseconds)
i: 140.0 Inclination (degrees)
Ω: 60.4 Longitude of ascending node (degrees)
T: 2086.122 Epoch of periastron passage (year)
e: 0.075 Eccentricity
ω: -30.0 Longitude of periastron (degrees)
Start-Year: 2001.5 Year
End-Year: 2048.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for MEL7
Position: 122815.23-154734.2 Epoch-2000 right ascension and declination
WDS-ID: 12283-1548 WDS designation
Discoverer Code: MEL7 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 20.52 Magnitude of the primary
V2: 21.05 Magnitude of the secondary
Equinox: Equinox
Date: 2013 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Dup2017 Reference

Double Star Orbit for MEL7



WDS 6th Orbit including measures of MEL7

-- 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 MEL7
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.268   203.04
--------------------------
2001.50    0.254    17.79
2001.60    0.253    16.99
2001.70    0.252    16.18
2001.80    0.252    15.36
2001.90    0.251    14.55
2002.00    0.250    13.72
2002.10    0.249    12.90
2002.20    0.249    12.07
2002.30    0.248    11.23
2002.40    0.248    10.39
2002.50    0.247     9.55
2002.60    0.246     8.70
2002.70    0.246     7.84
2002.80    0.245     6.99
2002.90    0.244     6.12
2003.00    0.244     5.26
2003.10    0.243     4.39
2003.20    0.243     3.51
2003.30    0.242     2.64
2003.40    0.242     1.75
2003.50    0.241     0.87
2003.60    0.241   359.98
2003.70    0.240   359.09
2003.80    0.240   358.19
2003.90    0.239   357.29
2004.00    0.239   356.38
2004.10    0.238   355.48
2004.20    0.238   354.57
2004.30    0.238   353.65
2004.40    0.237   352.74
2004.50    0.237   351.82
2004.60    0.236   350.90
2004.70    0.236   349.97
2004.80    0.236   349.05
2004.90    0.236   348.12
2005.00    0.235   347.19
2005.10    0.235   346.25
2005.20    0.235   345.32
2005.30    0.235   344.39
2005.40    0.235   343.45
2005.50    0.235   342.51
2005.60    0.234   341.57
2005.70    0.234   340.63
2005.80    0.234   339.69
2005.90    0.234   338.75
2006.00    0.234   337.81
2006.10    0.234   336.87
2006.20    0.234   335.93
2006.30    0.234   334.99
2006.40    0.234   334.05
2006.50    0.235   333.11
2006.60    0.235   332.18
2006.70    0.235   331.24
2006.80    0.235   330.31
2006.90    0.235   329.37
2007.00    0.236   328.44
2007.10    0.236   327.51
2007.20    0.236   326.58
2007.30    0.236   325.66
2007.40    0.237   324.74
2007.50    0.237   323.82
2007.60    0.237   322.90
2007.70    0.238   321.99
2007.80    0.238   321.08
2007.90    0.239   320.17
2008.00    0.239   319.26
2008.10    0.240   318.36
2008.20    0.240   317.47
2008.30    0.241   316.57
2008.40    0.241   315.69
2008.50    0.242   314.80
2008.60    0.242   313.92
2008.70    0.243   313.04
2008.80    0.244   312.17
2008.90    0.244   311.31
2009.00    0.245   310.44
2009.10    0.246   309.59
2009.20    0.246   308.73
2009.30    0.247   307.89
2009.40    0.248   307.04
2009.50    0.249   306.21
2009.60    0.249   305.37
2009.70    0.250   304.55
2009.80    0.251   303.72
2009.90    0.252   302.91
2010.00    0.253   302.09
2010.10    0.253   301.29
2010.20    0.254   300.49
2010.30    0.255   299.69
2010.40    0.256   298.90
2010.50    0.257   298.12
2010.60    0.258   297.34
2010.70    0.259   296.56
2010.80    0.259   295.79
2010.90    0.260   295.03
2011.00    0.261   294.27
2011.10    0.262   293.52
2011.20    0.263   292.77
2011.30    0.264   292.03
2011.40    0.265   291.29
2011.50    0.266   290.56
2011.60    0.267   289.83
2011.70    0.268   289.11
2011.80    0.269   288.39
2011.90    0.270   287.68
2012.00    0.271   286.97
2012.10    0.272   286.27
2012.20    0.273   285.57
2012.30    0.274   284.88
2012.40    0.275   284.19
2012.50    0.276   283.51
2012.60    0.276   282.84
2012.70    0.277   282.16
2012.80    0.278   281.49
2012.90    0.279   280.83
2013.00    0.280   280.17
2013.10    0.281   279.52
2013.20    0.282   278.87
2013.30    0.283   278.22
2013.40    0.284   277.58
2013.50    0.285   276.94
2013.60    0.286   276.31
2013.70    0.287   275.68
2013.80    0.288   275.05
2013.90    0.289   274.43
2014.00    0.289   273.81
2014.10    0.290   273.20
2014.20    0.291   272.59
2014.30    0.292   271.98
2014.40    0.293   271.38
2014.50    0.294   270.78
2014.60    0.295   270.18
2014.70    0.295   269.59
2014.80    0.296   269.00
2014.90    0.297   268.41
2015.00    0.298   267.83
2015.10    0.299   267.24
2015.20    0.299   266.67
2015.30    0.300   266.09
2015.40    0.301   265.52
2015.50    0.301   264.95
2015.60    0.302   264.38
2015.70    0.303   263.82
2015.80    0.304   263.26
2015.90    0.304   262.70
2016.00    0.305   262.14
2016.10    0.305   261.59
2016.20    0.306   261.04
2016.30    0.307   260.49
2016.40    0.307   259.94
2016.50    0.308   259.39
2016.60    0.308   258.85
2016.70    0.309   258.31
2016.80    0.309   257.77
2016.90    0.310   257.23
2017.00    0.310   256.70
2017.10    0.311   256.16
2017.20    0.311   255.63
2017.30    0.312   255.10
2017.40    0.312   254.57
2017.50    0.313   254.04
2017.60    0.313   253.51
2017.70    0.313   252.98
2017.80    0.314   252.46
2017.90    0.314   251.93
2018.00    0.314   251.41
2018.10    0.315   250.89
2018.20    0.315   250.37
2018.30    0.315   249.85
2018.40    0.315   249.33
2018.50    0.315   248.81
2018.60    0.316   248.29
2018.70    0.316   247.77
2018.80    0.316   247.26
2018.90    0.316   246.74
2019.00    0.316   246.22
2019.10    0.316   245.71
2019.20    0.316   245.19
2019.30    0.316   244.68
2019.40    0.316   244.16
2019.50    0.316   243.64
2019.60    0.316   243.13
2019.70    0.316   242.61
2019.80    0.316   242.10
2019.90    0.316   241.58
2020.00    0.316   241.06
2020.10    0.316   240.55
2020.20    0.316   240.03
2020.30    0.316   239.51
2020.40    0.315   238.99
2020.50    0.315   238.47
2020.60    0.315   237.95
2020.70    0.315   237.43
2020.80    0.314   236.91
2020.90    0.314   236.39
2021.00    0.314   235.86
2021.10    0.313   235.34
2021.20    0.313   234.81
2021.30    0.313   234.29
2021.40    0.312   233.76
2021.50    0.312   233.23
2021.60    0.311   232.70
2021.70    0.311   232.16
2021.80    0.310   231.63
2021.90    0.310   231.09
2022.00    0.309   230.55
2022.10    0.309   230.01
2022.20    0.308   229.47
2022.30    0.308   228.93
2022.40    0.307   228.38
2022.50    0.306   227.83
2022.60    0.306   227.28
2022.70    0.305   226.73
2022.80    0.304   226.17
2022.90    0.304   225.61
2023.00    0.303   225.05
2023.10    0.302   224.49
2023.20    0.301   223.92
2023.30    0.301   223.35
2023.40    0.300   222.78
2023.50    0.299   222.21
2023.60    0.298   221.63
2023.70    0.297   221.05
2023.80    0.297   220.46
2023.90    0.296   219.87
2024.00    0.295   219.28
2024.10    0.294   218.68
2024.20    0.293   218.08
2024.30    0.292   217.48
2024.40    0.291   216.87
2024.50    0.290   216.26
2024.60    0.289   215.65
2024.70    0.288   215.03
2024.80    0.287   214.40
2024.90    0.286   213.78
2025.00    0.285   213.14
2025.10    0.284   212.51
2025.20    0.283   211.86
2025.30    0.282   211.22
2025.40    0.281   210.57
2025.50    0.280   209.91
2025.60    0.279   209.25
2025.70    0.278   208.58
2025.80    0.276   207.91
2025.90    0.275   207.23
2026.00    0.274   206.54
2026.10    0.273   205.85
2026.20    0.272   205.16
2026.30    0.271   204.46
2026.40    0.270   203.75
2026.50    0.268   203.04
2026.60    0.267   202.32
2026.70    0.266   201.59
2026.80    0.265   200.86
2026.90    0.264   200.12
2027.00    0.263   199.38
2027.10    0.261   198.62
2027.20    0.260   197.87
2027.30    0.259   197.10
2027.40    0.258   196.33
2027.50    0.257   195.55
2027.60    0.256   194.76
2027.70    0.254   193.97
2027.80    0.253   193.17
2027.90    0.252   192.36
2028.00    0.251   191.54
2028.10    0.250   190.72
2028.20    0.249   189.89
2028.30    0.247   189.05
2028.40    0.246   188.20
2028.50    0.245   187.35
2028.60    0.244   186.48
2028.70    0.243   185.61
2028.80    0.242   184.74
2028.90    0.241   183.85
2029.00    0.240   182.96
2029.10    0.239   182.06
2029.20    0.238   181.15
2029.30    0.237   180.23
2029.40    0.236   179.31
2029.50    0.235   178.38
2029.60    0.234   177.44
2029.70    0.233   176.49
2029.80    0.232   175.54
2029.90    0.231   174.57
2030.00    0.230   173.61
2030.10    0.229   172.63
2030.20    0.229   171.65
2030.30    0.228   170.65
2030.40    0.227   169.66
2030.50    0.226   168.65
2030.60    0.226   167.64
2030.70    0.225   166.63
2030.80    0.224   165.60
2030.90    0.224   164.57
2031.00    0.223   163.54
2031.10    0.222   162.50
2031.20    0.222   161.45
2031.30    0.221   160.40
2031.40    0.221   159.35
2031.50    0.220   158.28
2031.60    0.220   157.22
2031.70    0.220   156.15
2031.80    0.219   155.08
2031.90    0.219   154.00
2032.00    0.219   152.93
2032.10    0.218   151.84
2032.20    0.218   150.76
2032.30    0.218   149.68
2032.40    0.218   148.59
2032.50    0.218   147.50
2032.60    0.218   146.41
2032.70    0.218   145.32
2032.80    0.217   144.23
2032.90    0.217   143.14
2033.00    0.218   142.05
2033.10    0.218   140.95
2033.20    0.218   139.87
2033.30    0.218   138.78
2033.40    0.218   137.69
2033.50    0.218   136.61
2033.60    0.219   135.53
2033.70    0.219   134.45
2033.80    0.219   133.37
2033.90    0.219   132.30
2034.00    0.220   131.23
2034.10    0.220   130.16
2034.20    0.221   129.10
2034.30    0.221   128.04
2034.40    0.222   126.99
2034.50    0.222   125.94
2034.60    0.223   124.89
2034.70    0.223   123.85
2034.80    0.224   122.82
2034.90    0.224   121.79
2035.00    0.225   120.77
2035.10    0.226   119.75
2035.20    0.226   118.74
2035.30    0.227   117.74
2035.40    0.228   116.74
2035.50    0.229   115.75
2035.60    0.229   114.77
2035.70    0.230   113.79
2035.80    0.231   112.82
2035.90    0.232   111.85
2036.00    0.232   110.89
2036.10    0.233   109.94
2036.20    0.234   109.00
2036.30    0.235   108.06
2036.40    0.236   107.13
2036.50    0.237   106.20
2036.60    0.238   105.29
2036.70    0.239   104.37
2036.80    0.239   103.47
2036.90    0.240   102.57
2037.00    0.241   101.68
2037.10    0.242   100.80
2037.20    0.243    99.92
2037.30    0.244    99.05
2037.40    0.245    98.19
2037.50    0.246    97.33
2037.60    0.247    96.48
2037.70    0.248    95.64
2037.80    0.249    94.80
2037.90    0.250    93.97
2038.00    0.250    93.14
2038.10    0.251    92.32
2038.20    0.252    91.51
2038.30    0.253    90.70
2038.40    0.254    89.90
2038.50    0.255    89.10
2038.60    0.256    88.31
2038.70    0.257    87.52
2038.80    0.257    86.74
2038.90    0.258    85.97
2039.00    0.259    85.19
2039.10    0.260    84.43
2039.20    0.261    83.67
2039.30    0.262    82.91
2039.40    0.262    82.16
2039.50    0.263    81.41
2039.60    0.264    80.67
2039.70    0.265    79.93
2039.80    0.265    79.19
2039.90    0.266    78.46
2040.00    0.267    77.73
2040.10    0.267    77.01
2040.20    0.268    76.29
2040.30    0.269    75.57
2040.40    0.269    74.86
2040.50    0.270    74.15
2040.60    0.270    73.44
2040.70    0.271    72.74
2040.80    0.272    72.04
2040.90    0.272    71.34
2041.00    0.273    70.64
2041.10    0.273    69.95
2041.20    0.273    69.26
2041.30    0.274    68.57
2041.40    0.274    67.88
2041.50    0.275    67.19
2041.60    0.275    66.51
2041.70    0.275    65.83
2041.80    0.276    65.15
2041.90    0.276    64.47
2042.00    0.276    63.80
2042.10    0.277    63.12
2042.20    0.277    62.45
2042.30    0.277    61.77
2042.40    0.277    61.10
2042.50    0.277    60.43
2042.60    0.277    59.76
2042.70    0.278    59.09
2042.80    0.278    58.42
2042.90    0.278    57.75
2043.00    0.278    57.08
2043.10    0.278    56.41
2043.20    0.278    55.74
2043.30    0.278    55.07
2043.40    0.278    54.40
2043.50    0.278    53.73
2043.60    0.278    53.07
2043.70    0.277    52.40
2043.80    0.277    51.72
2043.90    0.277    51.05
2044.00    0.277    50.38
2044.10    0.277    49.71
2044.20    0.277    49.03
2044.30    0.276    48.36
2044.40    0.276    47.68
2044.50    0.276    47.01
2044.60    0.276    46.33
2044.70    0.275    45.65
2044.80    0.275    44.96
2044.90    0.275    44.28
2045.00    0.274    43.60
2045.10    0.274    42.91
2045.20    0.273    42.22
2045.30    0.273    41.53
2045.40    0.273    40.83
2045.50    0.272    40.14
2045.60    0.272    39.44
2045.70    0.271    38.74
2045.80    0.271    38.04
2045.90    0.270    37.33
2046.00    0.270    36.62
2046.10    0.269    35.91
2046.20    0.269    35.19
2046.30    0.268    34.48
2046.40    0.267    33.76
2046.50    0.267    33.03
2046.60    0.266    32.31
2046.70    0.266    31.58
2046.80    0.265    30.84
2046.90    0.264    30.11
2047.00    0.264    29.37
2047.10    0.263    28.62
2047.20    0.262    27.87
2047.30    0.262    27.12
2047.40    0.261    26.37
2047.50    0.260    25.61
2047.60    0.260    24.85
2047.70    0.259    24.08
2047.80    0.258    23.31
2047.90    0.258    22.53
2048.00    0.257    21.75
2048.10    0.256    20.97
2048.20    0.256    20.18
2048.30    0.255    19.39
2048.40    0.254    18.59






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 16:46:36



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