Double Star Calculator - Orbit

Orbital Elements for TOK698

WDS:	TOK698	WDS ID/Discoverer
P:	12.790	Orbital period (years)
a:	0.1085	Semi-major axis (arcseconds)
i:	90.8	Inclination (degrees)
Ω:	59.6	Longitude of ascending node (degrees)
T:	2015.930	Epoch of periastron passage (year)
e:	0.164	Eccentricity
ω:	44.0	Longitude of periastron (degrees)
Start-Year:	2018.605	Year
End-Year:	2031.395	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for TOK698
Position:	195616.66-313648.7	Epoch-2000 right ascension and declination
WDS-ID:	19563-3137	WDS designation
Discoverer Code:	TOK698	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	188432	HD catalog number
Hipparcos number:	98108	Hipparcos catalog number
V1:	8.3	Magnitude of the primary
V2:	9.7	Magnitude of the secondary
Equinox:		Equinox
Date:		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:	Tok2024c	Reference

Double Star Orbit for TOK698

WDS 6th Orbit including measures of TOK698

-- 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 TOK698

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.083    60.19
--------------------------
2018.61    0.080   240.32
2018.70    0.084   240.25
2018.80    0.088   240.19
2018.90    0.091   240.13
2019.00    0.095   240.08
2019.10    0.098   240.03
2019.20    0.101   239.98
2019.30    0.104   239.94
2019.40    0.107   239.90
2019.50    0.109   239.86
2019.60    0.111   239.82
2019.70    0.113   239.78
2019.80    0.115   239.75
2019.90    0.116   239.71
2020.00    0.117   239.68
2020.10    0.119   239.65
2020.20    0.119   239.62
2020.30    0.120   239.58
2020.40    0.120   239.55
2020.50    0.121   239.52
2020.60    0.121   239.49
2020.70    0.120   239.46
2020.80    0.120   239.43
2020.90    0.119   239.39
2021.00    0.118   239.36
2021.10    0.117   239.33
2021.20    0.116   239.30
2021.30    0.115   239.26
2021.40    0.113   239.23
2021.50    0.111   239.19
2021.60    0.110   239.15
2021.70    0.107   239.11
2021.80    0.105   239.07
2021.90    0.103   239.03
2022.00    0.100   238.99
2022.10    0.097   238.94
2022.20    0.095   238.89
2022.30    0.091   238.84
2022.40    0.088   238.78
2022.50    0.085   238.72
2022.60    0.082   238.66
2022.70    0.078   238.58
2022.80    0.074   238.50
2022.90    0.070   238.42
2023.00    0.067   238.32
2023.10    0.063   238.21
2023.20    0.058   238.09
2023.30    0.054   237.94
2023.40    0.050   237.77
2023.50    0.046   237.57
2023.60    0.041   237.33
2023.70    0.037   237.03
2023.80    0.032   236.64
2023.90    0.027   236.12
2024.00    0.023   235.39
2024.10    0.018   234.28
2024.20    0.013   232.40
2024.30    0.009   228.46
2024.40    0.004   215.44
2024.50    0.002   116.97
2024.60    0.006    75.36
2024.70    0.011    68.36
2024.80    0.015    65.61
2024.90    0.020    64.15
2025.00    0.025    63.24
2025.10    0.029    62.61
2025.20    0.034    62.16
2025.30    0.039    61.81
2025.40    0.043    61.53
2025.50    0.047    61.31
2025.60    0.051    61.12
2025.70    0.056    60.96
2025.80    0.060    60.83
2025.90    0.063    60.70
2026.00    0.067    60.60
2026.10    0.071    60.50
2026.20    0.074    60.41
2026.30    0.077    60.33
2026.40    0.080    60.26
2026.50    0.083    60.19
2026.60    0.085    60.13
2026.70    0.087    60.06
2026.80    0.089    60.01
2026.90    0.091    59.95
2027.00    0.092    59.90
2027.10    0.094    59.84
2027.20    0.094    59.79
2027.30    0.095    59.74
2027.40    0.095    59.69
2027.50    0.095    59.64
2027.60    0.094    59.59
2027.70    0.093    59.54
2027.80    0.092    59.48
2027.90    0.091    59.43
2028.00    0.089    59.37
2028.10    0.086    59.31
2028.20    0.084    59.25
2028.30    0.081    59.18
2028.40    0.078    59.11
2028.50    0.074    59.03
2028.60    0.070    58.94
2028.70    0.066    58.84
2028.80    0.061    58.73
2028.90    0.057    58.60
2029.00    0.052    58.44
2029.10    0.047    58.26
2029.20    0.041    58.02
2029.30    0.036    57.71
2029.40    0.030    57.29
2029.50    0.024    56.66
2029.60    0.018    55.65
2029.70    0.013    53.69
2029.80    0.007    48.21
2029.90    0.001   350.04
2030.00    0.006   253.13
2030.10    0.012   246.19
2030.20    0.018   243.95
2030.30    0.023   242.84
2030.40    0.029   242.17
2030.50    0.035   241.72
2030.60    0.041   241.40
2030.70    0.046   241.16
2030.80    0.051   240.97
2030.90    0.057   240.81
2031.00    0.062   240.68
2031.10    0.066   240.57
2031.20    0.071   240.47
2031.30    0.076   240.39

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 18:10:25