Double Star Calculator - Orbit

Orbital Elements for TOK731

WDS:	TOK731	WDS ID/Discoverer
P:	12.990	Orbital period (years)
a:	0.06	Semi-major axis (arcseconds)
i:	27.6	Inclination (degrees)
Ω:	198.0	Longitude of ascending node (degrees)
T:	2022.544	Epoch of periastron passage (year)
e:	0.616	Eccentricity
ω:	128.6	Longitude of periastron (degrees)
Start-Year:	2018.505	Year
End-Year:	2031.495	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for TOK731
Position:	212747.21-592148.7	Epoch-2000 right ascension and declination
WDS-ID:	21278-5922	WDS designation
Discoverer Code:	TOK731	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	203970	HD catalog number
Hipparcos number:	105976	Hipparcos catalog number
V1:	8.6	Magnitude of the primary
V2:	8.6	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:		Flags
Ephemerides:		Ephemerides
Code:	Tok2024c	Reference

Double Star Orbit for TOK731

WDS 6th Orbit including measures of TOK731

-- 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 TOK731

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.077   125.50
--------------------------
2018.51    0.084   171.57
2018.61    0.084   172.55
2018.70    0.083   173.56
2018.80    0.082   174.58
2018.90    0.081   175.62
2019.00    0.081   176.68
2019.10    0.080   177.77
2019.20    0.079   178.88
2019.30    0.078   180.02
2019.40    0.077   181.19
2019.50    0.075   182.40
2019.60    0.074   183.64
2019.70    0.073   184.92
2019.80    0.072   186.25
2019.90    0.070   187.63
2020.00    0.069   189.06
2020.10    0.068   190.55
2020.20    0.066   192.11
2020.30    0.065   193.75
2020.40    0.063   195.46
2020.50    0.061   197.28
2020.60    0.059   199.19
2020.70    0.058   201.23
2020.80    0.056   203.41
2020.90    0.054   205.75
2021.00    0.051   208.27
2021.10    0.049   211.01
2021.20    0.047   214.01
2021.30    0.045   217.32
2021.40    0.042   220.99
2021.50    0.040   225.11
2021.60    0.037   229.78
2021.70    0.035   235.14
2021.80    0.032   241.36
2021.90    0.030   248.65
2022.00    0.027   257.28
2022.10    0.025   267.52
2022.20    0.023   279.57
2022.30    0.022   293.39
2022.40    0.021   308.52
2022.50    0.021   324.06
2022.60    0.022   339.02
2022.70    0.023   352.71
2022.80    0.025     4.86
2022.90    0.026    15.51
2023.00    0.028    24.84
2023.10    0.030    33.05
2023.20    0.032    40.33
2023.30    0.034    46.82
2023.40    0.035    52.66
2023.50    0.037    57.94
2023.60    0.039    62.75
2023.70    0.041    67.15
2023.80    0.042    71.19
2023.90    0.044    74.93
2024.00    0.046    78.40
2024.10    0.047    81.63
2024.20    0.049    84.65
2024.30    0.050    87.48
2024.40    0.052    90.15
2024.50    0.053    92.66
2024.60    0.055    95.04
2024.70    0.056    97.30
2024.80    0.058    99.45
2024.90    0.059   101.49
2025.00    0.060   103.45
2025.10    0.062   105.32
2025.20    0.063   107.11
2025.30    0.064   108.83
2025.40    0.065   110.49
2025.50    0.067   112.08
2025.60    0.068   113.62
2025.70    0.069   115.11
2025.80    0.070   116.55
2025.90    0.071   117.95
2026.00    0.072   119.31
2026.10    0.073   120.62
2026.20    0.074   121.91
2026.30    0.075   123.15
2026.40    0.076   124.37
2026.50    0.077   125.56
2026.60    0.078   126.72
2026.70    0.079   127.86
2026.80    0.080   128.97
2026.90    0.080   130.06
2027.00    0.081   131.13
2027.10    0.082   132.18
2027.20    0.083   133.21
2027.30    0.083   134.22
2027.40    0.084   135.22
2027.50    0.084   136.20
2027.60    0.085   137.17
2027.70    0.086   138.13
2027.80    0.086   139.07
2027.90    0.087   140.00
2028.00    0.087   140.92
2028.10    0.088   141.84
2028.20    0.088   142.74
2028.30    0.088   143.63
2028.40    0.089   144.52
2028.50    0.089   145.40
2028.60    0.089   146.28
2028.70    0.090   147.14
2028.80    0.090   148.01
2028.90    0.090   148.87
2029.00    0.090   149.72
2029.10    0.090   150.57
2029.20    0.091   151.42
2029.30    0.091   152.27
2029.40    0.091   153.12
2029.50    0.091   153.96
2029.60    0.091   154.81
2029.70    0.091   155.65
2029.80    0.091   156.50
2029.90    0.091   157.35
2030.00    0.090   158.20
2030.10    0.090   159.05
2030.20    0.090   159.90
2030.30    0.090   160.76
2030.40    0.090   161.63
2030.50    0.089   162.50
2030.60    0.089   163.37
2030.70    0.089   164.26
2030.80    0.088   165.15
2030.90    0.088   166.04
2031.00    0.087   166.95
2031.10    0.087   167.87
2031.20    0.086   168.80
2031.30    0.086   169.74
2031.40    0.085   170.70

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 18:26:42