Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:10:13

Orbital Elements for TOK698

WDS:	TOK698	WDS ID/Discoverer
P:	13.000	Orbital period (years)
a:	0.1063	Semi-major axis (arcseconds)
i:	90.8	Inclination (degrees)
Ω:	59.8	Longitude of ascending node (degrees)
T:	2016.290	Epoch of periastron passage (year)
e:	0.292	Eccentricity
ω:	44.0	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	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:	98103	Hipparcos catalog number
V1:	8.3	Magnitude of the primary
V2:	9.7	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for TOK698

WDS 6th Orbit including measures of TOK698

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of TOK698

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.020    234.8
-------------------------
2019.0     0.095    240.2
2020.0     0.120    239.9
2021.0     0.126    239.6
2022.0     0.116    239.3
2023.0     0.093    238.9
2024.0     0.060    238.2
2025.0     0.020    234.8
2026.0     0.023     63.8
2027.0     0.061     60.9
2028.0     0.081     60.1
2029.0     0.067     59.4
2030.0     0.013     55.1

Disclaimer

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.