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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:10:41

Orbital Elements for BWL29AB

WDS:	BWL29AB	WDS ID/Discoverer
P:	10.020	Orbital period (years)
a:	0.183	Semi-major axis (arcseconds)
i:	108.4	Inclination (degrees)
Ω:	21.6	Longitude of ascending node (degrees)
T:	2024.210	Epoch of periastron passage (year)
e:	0.591	Eccentricity
ω:	68.5	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BWL29AB

Position:	122250.62-040446.2	Epoch-2000 right ascension and declination
WDS-ID:	12228-0405	WDS designation
Discoverer Code:	BWL29AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.5	Magnitude of the primary
V2:	9.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2023	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BWL29AB

WDS 6th Orbit including measures of BWL29AB

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

Ephemeris of BWL29AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.118    207.4
-------------------------
2020.0     0.107    146.1
2021.0     0.083    109.9
2022.0     0.093     67.7
2023.0     0.115     39.6
2024.0     0.068      9.7
2025.0     0.118    207.4
2026.0     0.186    194.8
2027.0     0.196    186.6
2028.0     0.178    178.0
2029.0     0.145    166.3

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.