Double Star Calculator - Orbit

Orbital Elements for MLR198
WDS: MLR198 WDS ID/Discoverer
P: 51.160 Orbital period (years)
a: 0.199 Semi-major axis (arcseconds)
i: 135.3 Inclination (degrees)
Ω: 192.7 Longitude of ascending node (degrees)
T: 1993.690 Epoch of periastron passage (year)
e: 0.542 Eccentricity
ω: 322.4 Longitude of periastron (degrees)
Start-Year: 1999.42 Year
End-Year: 2050.58 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for MLR198
Position: 164157.22+735314.3 Epoch-2000 right ascension and declination
WDS-ID: 16420+7353 WDS designation
Discoverer Code: MLR198 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 151746 HD catalog number
Hipparcos number: 81757 Hipparcos catalog number
V1: 7.3 Magnitude of the primary
V2: 7.6 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Hrt2014b Reference

Double Star Orbit for MLR198



WDS 6th Orbit including measures of MLR198

-- 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 MLR198
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.281    26.36
--------------------------
1999.42    0.123   134.79
1999.52    0.124   133.70
1999.62    0.125   132.63
1999.72    0.125   131.56
1999.82    0.126   130.50
1999.92    0.126   129.45
2000.02    0.127   128.41
2000.12    0.128   127.39
2000.22    0.128   126.37
2000.32    0.129   125.36
2000.42    0.130   124.37
2000.52    0.130   123.38
2000.62    0.131   122.40
2000.72    0.132   121.44
2000.82    0.132   120.48
2000.92    0.133   119.54
2001.02    0.134   118.60
2001.12    0.134   117.67
2001.22    0.135   116.76
2001.32    0.136   115.85
2001.42    0.137   114.96
2001.52    0.138   114.07
2001.62    0.138   113.20
2001.72    0.139   112.33
2001.82    0.140   111.48
2001.92    0.141   110.63
2002.02    0.142   109.80
2002.12    0.142   108.97
2002.22    0.143   108.16
2002.32    0.144   107.35
2002.42    0.145   106.55
2002.52    0.146   105.76
2002.62    0.147   104.98
2002.72    0.147   104.21
2002.82    0.148   103.45
2002.92    0.149   102.70
2003.02    0.150   101.96
2003.12    0.151   101.22
2003.22    0.152   100.50
2003.32    0.153    99.78
2003.42    0.154    99.07
2003.52    0.155    98.37
2003.62    0.156    97.68
2003.72    0.157    97.00
2003.82    0.157    96.32
2003.92    0.158    95.66
2004.02    0.159    95.00
2004.12    0.160    94.35
2004.22    0.161    93.70
2004.32    0.162    93.07
2004.42    0.163    92.44
2004.52    0.164    91.81
2004.62    0.165    91.20
2004.72    0.166    90.59
2004.82    0.167    89.99
2004.92    0.168    89.40
2005.02    0.169    88.81
2005.12    0.170    88.23
2005.22    0.171    87.66
2005.32    0.172    87.09
2005.42    0.173    86.53
2005.52    0.174    85.98
2005.62    0.175    85.43
2005.72    0.176    84.89
2005.82    0.177    84.35
2005.92    0.178    83.82
2006.02    0.179    83.30
2006.12    0.180    82.78
2006.22    0.181    82.27
2006.32    0.182    81.76
2006.42    0.183    81.26
2006.52    0.184    80.76
2006.62    0.185    80.27
2006.72    0.186    79.78
2006.82    0.187    79.30
2006.92    0.188    78.83
2007.02    0.189    78.36
2007.12    0.189    77.89
2007.22    0.190    77.43
2007.32    0.191    76.97
2007.42    0.192    76.52
2007.52    0.193    76.07
2007.62    0.194    75.63
2007.72    0.195    75.19
2007.82    0.196    74.76
2007.92    0.197    74.33
2008.02    0.198    73.90
2008.12    0.199    73.48
2008.22    0.200    73.06
2008.32    0.201    72.65
2008.42    0.202    72.24
2008.52    0.203    71.83
2008.62    0.204    71.43
2008.72    0.205    71.03
2008.82    0.206    70.64
2008.92    0.207    70.25
2009.02    0.208    69.86
2009.12    0.209    69.48
2009.22    0.210    69.09
2009.32    0.210    68.72
2009.42    0.211    68.34
2009.52    0.212    67.97
2009.62    0.213    67.60
2009.72    0.214    67.24
2009.82    0.215    66.88
2009.92    0.216    66.52
2010.02    0.217    66.16
2010.12    0.218    65.81
2010.22    0.219    65.46
2010.32    0.220    65.12
2010.42    0.220    64.77
2010.52    0.221    64.43
2010.62    0.222    64.09
2010.72    0.223    63.76
2010.82    0.224    63.42
2010.92    0.225    63.09
2011.02    0.226    62.76
2011.12    0.226    62.44
2011.22    0.227    62.11
2011.32    0.228    61.79
2011.42    0.229    61.47
2011.52    0.230    61.16
2011.62    0.231    60.84
2011.72    0.232    60.53
2011.82    0.232    60.22
2011.92    0.233    59.92
2012.02    0.234    59.61
2012.12    0.235    59.31
2012.22    0.236    59.01
2012.32    0.236    58.71
2012.42    0.237    58.41
2012.52    0.238    58.12
2012.62    0.239    57.82
2012.72    0.240    57.53
2012.82    0.240    57.24
2012.92    0.241    56.96
2013.02    0.242    56.67
2013.12    0.243    56.39
2013.22    0.243    56.10
2013.32    0.244    55.82
2013.42    0.245    55.55
2013.52    0.246    55.27
2013.62    0.246    54.99
2013.72    0.247    54.72
2013.82    0.248    54.45
2013.92    0.248    54.18
2014.02    0.249    53.91
2014.12    0.250    53.64
2014.22    0.251    53.37
2014.32    0.251    53.11
2014.42    0.252    52.85
2014.52    0.253    52.58
2014.62    0.253    52.32
2014.72    0.254    52.07
2014.82    0.255    51.81
2014.92    0.255    51.55
2015.02    0.256    51.30
2015.12    0.256    51.04
2015.22    0.257    50.79
2015.32    0.258    50.54
2015.42    0.258    50.29
2015.52    0.259    50.04
2015.62    0.260    49.79
2015.72    0.260    49.55
2015.82    0.261    49.30
2015.92    0.261    49.06
2016.02    0.262    48.81
2016.12    0.263    48.57
2016.22    0.263    48.33
2016.32    0.264    48.09
2016.42    0.264    47.85
2016.52    0.265    47.61
2016.62    0.265    47.38
2016.72    0.266    47.14
2016.82    0.266    46.91
2016.92    0.267    46.67
2017.02    0.267    46.44
2017.12    0.268    46.21
2017.22    0.268    45.97
2017.32    0.269    45.74
2017.42    0.269    45.51
2017.52    0.270    45.29
2017.62    0.270    45.06
2017.72    0.271    44.83
2017.82    0.271    44.60
2017.92    0.272    44.38
2018.02    0.272    44.15
2018.12    0.273    43.93
2018.22    0.273    43.70
2018.32    0.273    43.48
2018.42    0.274    43.26
2018.52    0.274    43.04
2018.62    0.275    42.82
2018.72    0.275    42.60
2018.82    0.275    42.38
2018.92    0.276    42.16
2019.02    0.276    41.94
2019.12    0.277    41.72
2019.22    0.277    41.50
2019.32    0.277    41.29
2019.42    0.278    41.07
2019.52    0.278    40.86
2019.62    0.278    40.64
2019.72    0.279    40.43
2019.82    0.279    40.21
2019.92    0.279    40.00
2020.02    0.280    39.79
2020.12    0.280    39.57
2020.22    0.280    39.36
2020.32    0.280    39.15
2020.42    0.281    38.94
2020.52    0.281    38.73
2020.62    0.281    38.52
2020.72    0.281    38.30
2020.82    0.282    38.10
2020.92    0.282    37.89
2021.02    0.282    37.68
2021.12    0.282    37.47
2021.22    0.283    37.26
2021.32    0.283    37.05
2021.42    0.283    36.84
2021.52    0.283    36.63
2021.62    0.283    36.43
2021.72    0.283    36.22
2021.82    0.284    36.01
2021.92    0.284    35.81
2022.02    0.284    35.60
2022.12    0.284    35.39
2022.22    0.284    35.19
2022.32    0.284    34.98
2022.42    0.284    34.78
2022.52    0.285    34.57
2022.62    0.285    34.36
2022.72    0.285    34.16
2022.82    0.285    33.95
2022.92    0.285    33.75
2023.02    0.285    33.54
2023.12    0.285    33.34
2023.22    0.285    33.13
2023.32    0.285    32.93
2023.42    0.285    32.72
2023.52    0.285    32.52
2023.62    0.285    32.31
2023.72    0.285    32.11
2023.82    0.285    31.90
2023.92    0.285    31.70
2024.02    0.285    31.49
2024.12    0.285    31.29
2024.22    0.285    31.08
2024.32    0.285    30.88
2024.42    0.285    30.67
2024.52    0.285    30.47
2024.62    0.285    30.26
2024.72    0.284    30.06
2024.82    0.284    29.85
2024.92    0.284    29.65
2025.02    0.284    29.44
2025.12    0.284    29.23
2025.22    0.284    29.03
2025.32    0.284    28.82
2025.42    0.284    28.61
2025.52    0.283    28.41
2025.62    0.283    28.20
2025.72    0.283    27.99
2025.82    0.283    27.78
2025.92    0.283    27.57
2026.02    0.282    27.37
2026.12    0.282    27.16
2026.22    0.282    26.95
2026.32    0.282    26.74
2026.42    0.281    26.53
2026.52    0.281    26.32
2026.62    0.281    26.11
2026.72    0.281    25.90
2026.82    0.280    25.68
2026.92    0.280    25.47
2027.02    0.280    25.26
2027.12    0.279    25.05
2027.22    0.279    24.83
2027.32    0.279    24.62
2027.42    0.278    24.40
2027.52    0.278    24.19
2027.62    0.277    23.97
2027.72    0.277    23.76
2027.82    0.277    23.54
2027.92    0.276    23.32
2028.02    0.276    23.10
2028.12    0.275    22.88
2028.22    0.275    22.66
2028.32    0.275    22.44
2028.42    0.274    22.22
2028.52    0.274    22.00
2028.62    0.273    21.78
2028.72    0.273    21.55
2028.82    0.272    21.33
2028.92    0.272    21.10
2029.02    0.271    20.88
2029.12    0.270    20.65
2029.22    0.270    20.42
2029.32    0.269    20.19
2029.42    0.269    19.96
2029.52    0.268    19.73
2029.62    0.268    19.50
2029.72    0.267    19.27
2029.82    0.266    19.03
2029.92    0.266    18.80
2030.02    0.265    18.56
2030.12    0.264    18.32
2030.22    0.264    18.08
2030.32    0.263    17.84
2030.42    0.262    17.60
2030.52    0.262    17.36
2030.62    0.261    17.12
2030.72    0.260    16.87
2030.82    0.259    16.62
2030.92    0.259    16.38
2031.02    0.258    16.13
2031.12    0.257    15.87
2031.22    0.256    15.62
2031.32    0.255    15.37
2031.42    0.254    15.11
2031.52    0.254    14.85
2031.62    0.253    14.59
2031.72    0.252    14.33
2031.82    0.251    14.07
2031.92    0.250    13.80
2032.02    0.249    13.54
2032.12    0.248    13.27
2032.22    0.247    13.00
2032.32    0.246    12.72
2032.42    0.245    12.45
2032.52    0.244    12.17
2032.62    0.243    11.89
2032.72    0.242    11.61
2032.82    0.241    11.32
2032.92    0.240    11.04
2033.02    0.239    10.75
2033.12    0.238    10.46
2033.22    0.237    10.16
2033.32    0.236     9.86
2033.42    0.235     9.56
2033.52    0.234     9.26
2033.62    0.233     8.96
2033.72    0.232     8.65
2033.82    0.230     8.33
2033.92    0.229     8.02
2034.02    0.228     7.70
2034.12    0.227     7.38
2034.22    0.226     7.05
2034.32    0.224     6.72
2034.42    0.223     6.39
2034.52    0.222     6.05
2034.62    0.220     5.71
2034.72    0.219     5.37
2034.82    0.218     5.02
2034.92    0.216     4.67
2035.02    0.215     4.31
2035.12    0.214     3.95
2035.22    0.212     3.58
2035.32    0.211     3.21
2035.42    0.209     2.83
2035.52    0.208     2.45
2035.62    0.207     2.06
2035.72    0.205     1.67
2035.82    0.204     1.27
2035.92    0.202     0.87
2036.02    0.201     0.46
2036.12    0.199     0.04
2036.22    0.197   359.62
2036.32    0.196   359.18
2036.42    0.194   358.75
2036.52    0.193   358.30
2036.62    0.191   357.85
2036.72    0.189   357.39
2036.82    0.188   356.92
2036.92    0.186   356.44
2037.02    0.184   355.96
2037.12    0.183   355.46
2037.22    0.181   354.96
2037.32    0.179   354.45
2037.42    0.177   353.92
2037.52    0.175   353.39
2037.62    0.174   352.84
2037.72    0.172   352.28
2037.82    0.170   351.71
2037.92    0.168   351.13
2038.02    0.166   350.54
2038.12    0.164   349.93
2038.22    0.162   349.30
2038.32    0.161   348.66
2038.42    0.159   348.01
2038.52    0.157   347.34
2038.62    0.155   346.65
2038.72    0.153   345.95
2038.82    0.151   345.22
2038.92    0.149   344.48
2039.02    0.147   343.72
2039.12    0.145   342.93
2039.22    0.142   342.12
2039.32    0.140   341.29
2039.42    0.138   340.43
2039.52    0.136   339.55
2039.62    0.134   338.64
2039.72    0.132   337.70
2039.82    0.130   336.73
2039.92    0.128   335.72
2040.02    0.126   334.68
2040.12    0.123   333.61
2040.22    0.121   332.50
2040.32    0.119   331.34
2040.42    0.117   330.15
2040.52    0.115   328.91
2040.62    0.113   327.62
2040.72    0.111   326.29
2040.82    0.108   324.90
2040.92    0.106   323.45
2041.02    0.104   321.95
2041.12    0.102   320.39
2041.22    0.100   318.76
2041.32    0.098   317.07
2041.42    0.096   315.30
2041.52    0.094   313.46
2041.62    0.092   311.54
2041.72    0.090   309.54
2041.82    0.089   307.46
2041.92    0.087   305.30
2042.02    0.085   303.05
2042.12    0.084   300.70
2042.22    0.082   298.27
2042.32    0.081   295.75
2042.42    0.079   293.14
2042.52    0.078   290.44
2042.62    0.077   287.66
2042.72    0.076   284.79
2042.82    0.075   281.85
2042.92    0.074   278.85
2043.02    0.073   275.78
2043.12    0.073   272.67
2043.22    0.072   269.51
2043.32    0.072   266.33
2043.42    0.072   263.13
2043.52    0.072   259.93
2043.62    0.072   256.73
2043.72    0.073   253.56
2043.82    0.073   250.41
2043.92    0.073   247.31
2044.02    0.074   244.25
2044.12    0.075   241.25
2044.22    0.076   238.31
2044.32    0.077   235.43
2044.42    0.078   232.63
2044.52    0.079   229.89
2044.62    0.080   227.24
2044.72    0.081   224.65
2044.82    0.082   222.14
2044.92    0.083   219.69
2045.02    0.084   217.32
2045.12    0.086   215.02
2045.22    0.087   212.77
2045.32    0.088   210.60
2045.42    0.089   208.48
2045.52    0.090   206.41
2045.62    0.092   204.40
2045.72    0.093   202.44
2045.82    0.094   200.53
2045.92    0.095   198.66
2046.02    0.096   196.83
2046.12    0.097   195.04
2046.22    0.098   193.29
2046.32    0.099   191.58
2046.42    0.100   189.89
2046.52    0.101   188.24
2046.62    0.102   186.61
2046.72    0.102   185.01
2046.82    0.103   183.44
2046.92    0.104   181.89
2047.02    0.105   180.36
2047.12    0.105   178.85
2047.22    0.106   177.36
2047.32    0.107   175.89
2047.42    0.107   174.44
2047.52    0.108   173.00
2047.62    0.109   171.58
2047.72    0.109   170.18
2047.82    0.110   168.79
2047.92    0.110   167.41
2048.02    0.111   166.05
2048.12    0.111   164.70
2048.22    0.112   163.36
2048.32    0.112   162.03
2048.42    0.113   160.71
2048.52    0.113   159.41
2048.62    0.114   158.12
2048.72    0.114   156.83
2048.82    0.115   155.56
2048.92    0.115   154.30
2049.02    0.116   153.05
2049.12    0.116   151.80
2049.22    0.116   150.57
2049.32    0.117   149.35
2049.42    0.117   148.14
2049.52    0.118   146.93
2049.62    0.118   145.74
2049.72    0.119   144.56
2049.82    0.119   143.39
2049.92    0.120   142.22
2050.02    0.120   141.07
2050.12    0.121   139.93
2050.22    0.121   138.79
2050.32    0.122   137.67
2050.42    0.123   136.55
2050.52    0.123   135.45






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 17:30:12



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