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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:23:30

Orbital Elements for BWL38

WDS:	BWL38	WDS ID/Discoverer
P:	9.730	Orbital period (years)
a:	0.101	Semi-major axis (arcseconds)
i:	106.0	Inclination (degrees)
Ω:	235.5	Longitude of ascending node (degrees)
T:	2020.180	Epoch of periastron passage (year)
e:	0.36	Eccentricity
ω:	282.0	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BWL38

Position:	142155.04-312553.7	Epoch-2000 right ascension and declination
WDS-ID:	14219-3126	WDS designation
Discoverer Code:	BWL38	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.4	Magnitude of the primary
V2:	9.5	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for BWL38

WDS 6th Orbit including measures of BWL38

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

Ephemeris of BWL38

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.046    109.9
-------------------------
2021.0     0.073    240.0
2022.0     0.086    226.0
2023.0     0.066    209.8
2024.0     0.041    172.3
2025.0     0.046    109.9
2026.0     0.074     80.9
2027.0     0.098     67.8
2028.0     0.100     58.4

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.