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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:17:19

Orbital Elements for VSP38

WDS:	VSP38	WDS ID/Discoverer
P:	14.500	Orbital period (years)
a:	0.069	Semi-major axis (arcseconds)
i:	32.0	Inclination (degrees)
Ω:	1.0	Longitude of ascending node (degrees)
T:	2020.300	Epoch of periastron passage (year)
e:	0.33	Eccentricity
ω:	337.0	Longitude of periastron (degrees)
Start-Year:	2018.0	Year
End-Year:	2032.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for VSP38

Position:	132157.13-511656.1	Epoch-2000 right ascension and declination
WDS-ID:	13220-5117	WDS designation
Discoverer Code:	VSP38	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	116038	HD catalog number
Hipparcos number:	65219	Hipparcos catalog number
V1:	7.1	Magnitude of the primary
V2:	7.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2019	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for VSP38

WDS 6th Orbit including measures of VSP38

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

Ephemeris of VSP38

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.075    126.5
-------------------------
2018.0     0.056    239.0
2019.0     0.045    277.4
2020.0     0.044    326.9
2021.0     0.048     11.6
2022.0     0.052     49.7
2023.0     0.057     82.0
2024.0     0.066    107.2
2025.0     0.075    126.5
2026.0     0.083    141.7
2027.0     0.088    154.6
2028.0     0.090    166.4
2029.0     0.089    178.1
2030.0     0.084    190.6
2031.0     0.075    205.5

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.