Double Star Calculator - Orbit

Orbital Elements for LDS838

WDS:	LDS838	WDS ID/Discoverer
P:	26.351	Orbital period (years)
a:	2.022	Semi-major axis (arcseconds)
i:	128.78	Inclination (degrees)
Ω:	146.22	Longitude of ascending node (degrees)
T:	2024.855	Epoch of periastron passage (year)
e:	0.6143	Eccentricity
ω:	284.27	Longitude of periastron (degrees)
Start-Year:	2011.8245	Year
End-Year:	2038.1755	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for LDS838
Position:	013901.54-175701.8	Epoch-2000 right ascension and declination
WDS-ID:	01388-1758	WDS designation
Discoverer Code:	LDS838	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	12.7	Magnitude of the primary
V2:	13.2	Magnitude of the secondary
Equinox:		Equinox
Date:		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:	Msn2023	Reference

Double Star Orbit for LDS838

WDS 6th Orbit including measures of LDS838

-- 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 LDS838

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.196   139.70
--------------------------
2011.82    2.146    33.25
2011.92    2.151    32.65
2012.02    2.156    32.05
2012.12    2.161    31.46
2012.22    2.166    30.87
2012.32    2.171    30.28
2012.42    2.176    29.70
2012.52    2.180    29.12
2012.62    2.185    28.54
2012.72    2.190    27.96
2012.82    2.194    27.39
2012.92    2.199    26.82
2013.02    2.203    26.25
2013.12    2.207    25.68
2013.22    2.211    25.11
2013.32    2.215    24.55
2013.42    2.219    23.99
2013.52    2.223    23.43
2013.62    2.227    22.87
2013.72    2.231    22.31
2013.82    2.234    21.76
2013.92    2.238    21.21
2014.02    2.241    20.66
2014.12    2.244    20.11
2014.22    2.247    19.56
2014.32    2.250    19.02
2014.42    2.253    18.47
2014.52    2.256    17.93
2014.62    2.258    17.39
2014.72    2.261    16.85
2014.82    2.263    16.31
2014.92    2.265    15.77
2015.02    2.267    15.23
2015.12    2.269    14.69
2015.22    2.271    14.16
2015.32    2.272    13.62
2015.42    2.274    13.09
2015.52    2.275    12.56
2015.62    2.276    12.02
2015.72    2.277    11.49
2015.82    2.277    10.96
2015.92    2.278    10.42
2016.02    2.278     9.89
2016.12    2.278     9.36
2016.22    2.278     8.83
2016.32    2.277     8.30
2016.42    2.277     7.76
2016.52    2.276     7.23
2016.62    2.275     6.70
2016.72    2.274     6.16
2016.82    2.272     5.63
2016.92    2.271     5.09
2017.02    2.269     4.56
2017.12    2.266     4.02
2017.22    2.264     3.48
2017.32    2.261     2.94
2017.42    2.258     2.40
2017.52    2.255     1.86
2017.62    2.251     1.32
2017.72    2.247     0.77
2017.82    2.243     0.22
2017.92    2.238   359.67
2018.02    2.234   359.12
2018.12    2.228   358.57
2018.22    2.223   358.01
2018.32    2.217   357.45
2018.42    2.211   356.89
2018.52    2.204   356.32
2018.62    2.197   355.75
2018.72    2.190   355.18
2018.82    2.182   354.60
2018.92    2.174   354.02
2019.02    2.166   353.43
2019.12    2.157   352.84
2019.22    2.147   352.25
2019.32    2.138   351.64
2019.42    2.127   351.04
2019.52    2.116   350.42
2019.62    2.105   349.80
2019.72    2.093   349.18
2019.82    2.081   348.54
2019.92    2.068   347.90
2020.02    2.055   347.25
2020.12    2.041   346.59
2020.22    2.026   345.93
2020.32    2.011   345.25
2020.42    1.995   344.56
2020.52    1.978   343.86
2020.62    1.961   343.15
2020.72    1.943   342.43
2020.82    1.924   341.69
2020.92    1.905   340.93
2021.02    1.885   340.17
2021.12    1.864   339.38
2021.22    1.842   338.58
2021.32    1.819   337.75
2021.42    1.795   336.91
2021.52    1.771   336.04
2021.62    1.745   335.15
2021.72    1.718   334.22
2021.82    1.691   333.27
2021.92    1.662   332.29
2022.02    1.632   331.28
2022.12    1.601   330.22
2022.22    1.568   329.12
2022.32    1.535   327.97
2022.42    1.500   326.77
2022.52    1.463   325.52
2022.62    1.425   324.19
2022.72    1.386   322.80
2022.82    1.345   321.31
2022.92    1.302   319.74
2023.02    1.258   318.05
2023.12    1.212   316.25
2023.22    1.165   314.29
2023.32    1.116   312.17
2023.42    1.065   309.84
2023.52    1.012   307.28
2023.62    0.958   304.44
2023.72    0.903   301.25
2023.82    0.848   297.64
2023.92    0.791   293.53
2024.02    0.736   288.78
2024.12    0.681   283.27
2024.22    0.630   276.84
2024.32    0.583   269.31
2024.42    0.544   260.58
2024.52    0.514   250.67
2024.62    0.497   239.82
2024.72    0.494   228.51
2024.82    0.505   217.38
2024.92    0.529   207.01
2025.02    0.564   197.72
2025.12    0.606   189.62
2025.22    0.653   182.63
2025.32    0.702   176.60
2025.42    0.753   171.38
2025.52    0.803   166.81
2025.62    0.852   162.78
2025.72    0.900   159.18
2025.82    0.946   155.94
2025.92    0.989   152.99
2026.02    1.030   150.28
2026.12    1.069   147.77
2026.22    1.106   145.44
2026.32    1.140   143.25
2026.42    1.173   141.19
2026.52    1.204   139.23
2026.62    1.232   137.37
2026.72    1.260   135.59
2026.82    1.285   133.89
2026.92    1.309   132.25
2027.02    1.332   130.66
2027.12    1.353   129.13
2027.22    1.374   127.65
2027.32    1.393   126.21
2027.42    1.411   124.80
2027.52    1.428   123.43
2027.62    1.444   122.09
2027.72    1.460   120.78
2027.82    1.475   119.50
2027.92    1.488   118.24
2028.02    1.502   117.01
2028.12    1.514   115.80
2028.22    1.527   114.60
2028.32    1.538   113.43
2028.42    1.549   112.27
2028.52    1.560   111.13
2028.62    1.570   110.00
2028.72    1.580   108.89
2028.82    1.589   107.79
2028.92    1.598   106.70
2029.02    1.607   105.63
2029.12    1.616   104.56
2029.22    1.624   103.51
2029.32    1.632   102.47
2029.42    1.640   101.44
2029.52    1.647   100.42
2029.62    1.654    99.40
2029.72    1.662    98.40
2029.82    1.669    97.40
2029.92    1.675    96.42
2030.02    1.682    95.44
2030.12    1.689    94.46
2030.22    1.695    93.50
2030.32    1.701    92.54
2030.42    1.707    91.59
2030.52    1.713    90.65
2030.62    1.720    89.71
2030.72    1.725    88.78
2030.82    1.731    87.86
2030.92    1.737    86.94
2031.02    1.743    86.03
2031.12    1.749    85.12
2031.22    1.754    84.22
2031.32    1.760    83.33
2031.42    1.766    82.44
2031.52    1.771    81.56
2031.62    1.777    80.68
2031.72    1.782    79.81
2031.82    1.788    78.94
2031.92    1.793    78.08
2032.02    1.799    77.22
2032.12    1.804    76.37
2032.22    1.810    75.53
2032.32    1.815    74.69
2032.42    1.821    73.85
2032.52    1.826    73.02
2032.62    1.832    72.20
2032.72    1.837    71.38
2032.82    1.843    70.56
2032.92    1.848    69.75
2033.02    1.854    68.95
2033.12    1.860    68.14
2033.22    1.865    67.35
2033.32    1.871    66.56
2033.42    1.876    65.77
2033.52    1.882    64.99
2033.62    1.888    64.21
2033.72    1.893    63.44
2033.82    1.899    62.67
2033.92    1.905    61.91
2034.02    1.910    61.15
2034.12    1.916    60.40
2034.22    1.922    59.65
2034.32    1.928    58.90
2034.42    1.933    58.16
2034.52    1.939    57.42
2034.62    1.945    56.69
2034.72    1.951    55.96
2034.82    1.956    55.24
2034.92    1.962    54.52
2035.02    1.968    53.81
2035.12    1.974    53.10
2035.22    1.980    52.39
2035.32    1.986    51.69
2035.42    1.991    50.99
2035.52    1.997    50.30
2035.62    2.003    49.61
2035.72    2.009    48.92
2035.82    2.015    48.24
2035.92    2.021    47.56
2036.02    2.026    46.89
2036.12    2.032    46.22
2036.22    2.038    45.55
2036.32    2.044    44.89
2036.42    2.050    44.23
2036.52    2.055    43.57
2036.62    2.061    42.92
2036.72    2.067    42.27
2036.82    2.072    41.63
2036.92    2.078    40.99
2037.02    2.084    40.35
2037.12    2.089    39.72
2037.22    2.095    39.08
2037.32    2.100    38.46
2037.42    2.106    37.83
2037.52    2.111    37.21
2037.62    2.117    36.59
2037.72    2.122    35.98
2037.82    2.128    35.37
2037.92    2.133    34.76
2038.02    2.138    34.16
2038.12    2.143    33.55

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 14:52:32