Double Star Calculator - Orbit

Orbital Elements for TOK187

WDS:	TOK187	WDS ID/Discoverer
P:	17.671	Orbital period (years)
a:	0.237	Semi-major axis (arcseconds)
i:	145.2	Inclination (degrees)
Ω:	27.8	Longitude of ascending node (degrees)
T:	2016.919	Epoch of periastron passage (year)
e:	0.829	Eccentricity
ω:	27.2	Longitude of periastron (degrees)
Start-Year:	2016.1645	Year
End-Year:	2033.8355	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for TOK187
Position:	024325.56-375542.5	Epoch-2000 right ascension and declination
WDS-ID:	02434-3756	WDS designation
Discoverer Code:	TOK187	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	17084	HD catalog number
Hipparcos number:	12716	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	13.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2018e	Reference

Double Star Orbit for TOK187

WDS 6th Orbit including measures of TOK187

-- 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 TOK187

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.414   182.66
--------------------------
2016.16    0.099   118.32
2016.26    0.090   112.40
2016.36    0.081   105.14
2016.46    0.072    96.03
2016.56    0.063    84.36
2016.66    0.055    69.13
2016.76    0.048    49.05
2016.86    0.042    22.55
2016.96    0.038   348.72
2017.06    0.040   313.11
2017.16    0.049   285.97
2017.26    0.061   268.41
2017.36    0.074   256.89
2017.46    0.088   248.84
2017.56    0.100   242.87
2017.66    0.113   238.22
2017.76    0.124   234.48
2017.86    0.136   231.36
2017.96    0.146   228.72
2018.06    0.157   226.43
2018.16    0.167   224.42
2018.26    0.176   222.62
2018.36    0.185   221.01
2018.46    0.194   219.55
2018.56    0.202   218.21
2018.66    0.211   216.98
2018.76    0.219   215.84
2018.86    0.226   214.78
2018.96    0.234   213.78
2019.06    0.241   212.85
2019.16    0.248   211.97
2019.26    0.254   211.13
2019.36    0.261   210.34
2019.46    0.267   209.58
2019.56    0.273   208.86
2019.66    0.279   208.17
2019.76    0.285   207.51
2019.86    0.290   206.88
2019.96    0.296   206.26
2020.06    0.301   205.67
2020.16    0.306   205.10
2020.26    0.311   204.55
2020.36    0.316   204.01
2020.46    0.320   203.49
2020.56    0.325   202.99
2020.66    0.329   202.50
2020.76    0.333   202.02
2020.86    0.337   201.55
2020.96    0.341   201.09
2021.06    0.345   200.65
2021.16    0.349   200.21
2021.26    0.353   199.79
2021.36    0.356   199.37
2021.46    0.359   198.96
2021.56    0.363   198.55
2021.66    0.366   198.16
2021.76    0.369   197.77
2021.86    0.372   197.39
2021.96    0.375   197.01
2022.06    0.378   196.64
2022.16    0.380   196.27
2022.26    0.383   195.91
2022.36    0.385   195.55
2022.46    0.388   195.20
2022.56    0.390   194.86
2022.66    0.392   194.51
2022.76    0.394   194.17
2022.86    0.396   193.84
2022.96    0.398   193.50
2023.06    0.400   193.17
2023.16    0.402   192.85
2023.26    0.403   192.52
2023.36    0.405   192.20
2023.46    0.406   191.88
2023.56    0.408   191.56
2023.66    0.409   191.25
2023.76    0.410   190.94
2023.86    0.412   190.62
2023.96    0.413   190.31
2024.06    0.414   190.01
2024.16    0.414   189.70
2024.26    0.415   189.39
2024.36    0.416   189.09
2024.46    0.417   188.79
2024.56    0.417   188.49
2024.66    0.418   188.18
2024.76    0.418   187.88
2024.86    0.419   187.58
2024.96    0.419   187.28
2025.06    0.419   186.98
2025.16    0.419   186.69
2025.26    0.419   186.39
2025.36    0.419   186.09
2025.46    0.419   185.79
2025.56    0.419   185.49
2025.66    0.419   185.19
2025.76    0.418   184.89
2025.86    0.418   184.59
2025.96    0.418   184.29
2026.06    0.417   183.99
2026.16    0.416   183.68
2026.26    0.416   183.38
2026.36    0.415   183.08
2026.46    0.414   182.77
2026.56    0.413   182.46
2026.66    0.412   182.15
2026.76    0.411   181.84
2026.86    0.410   181.53
2026.96    0.409   181.22
2027.06    0.407   180.90
2027.16    0.406   180.58
2027.26    0.405   180.27
2027.36    0.403   179.94
2027.46    0.401   179.62
2027.56    0.400   179.29
2027.66    0.398   178.96
2027.76    0.396   178.63
2027.86    0.394   178.29
2027.96    0.392   177.95
2028.06    0.390   177.61
2028.16    0.388   177.26
2028.26    0.386   176.91
2028.36    0.384   176.56
2028.46    0.381   176.20
2028.56    0.379   175.83
2028.66    0.376   175.46
2028.76    0.374   175.09
2028.86    0.371   174.71
2028.96    0.368   174.32
2029.06    0.365   173.93
2029.16    0.362   173.54
2029.26    0.359   173.13
2029.36    0.356   172.72
2029.46    0.353   172.30
2029.56    0.349   171.88
2029.66    0.346   171.44
2029.76    0.343   171.00
2029.86    0.339   170.55
2029.96    0.335   170.08
2030.06    0.332   169.61
2030.16    0.328   169.13
2030.26    0.324   168.63
2030.36    0.320   168.12
2030.46    0.315   167.60
2030.56    0.311   167.07
2030.66    0.307   166.52
2030.76    0.302   165.95
2030.86    0.298   165.37
2030.96    0.293   164.76
2031.06    0.288   164.14
2031.16    0.283   163.50
2031.26    0.278   162.83
2031.36    0.273   162.14
2031.46    0.268   161.42
2031.56    0.263   160.68
2031.66    0.257   159.90
2031.76    0.251   159.08
2031.86    0.246   158.23
2031.96    0.240   157.34
2032.06    0.234   156.40
2032.16    0.227   155.41
2032.26    0.221   154.37
2032.36    0.215   153.26
2032.46    0.208   152.08
2032.56    0.201   150.82
2032.66    0.194   149.48
2032.76    0.187   148.03
2032.86    0.180   146.47
2032.96    0.172   144.77
2033.06    0.164   142.91
2033.16    0.157   140.87
2033.26    0.148   138.61
2033.36    0.140   136.08
2033.46    0.132   133.24
2033.56    0.123   130.00
2033.66    0.114   126.27
2033.76    0.105   121.91

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 15:03:46