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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:58:14

Orbital Elements for BPER

WDS:	BPER	WDS ID/Discoverer
P:	1.921	Orbital period (years)
a:	0.00509	Semi-major axis (arcseconds)
i:	83.46	Inclination (degrees)
Ω:	115.29	Longitude of ascending node (degrees)
T:	1968.785	Epoch of periastron passage (year)
e:	0.235	Eccentricity
ω:	263.0	Longitude of periastron (degrees)
Start-Year:	2025.0	Year
End-Year:	2025.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BPER

Position:	041814.61+501743.8	Epoch-2000 right ascension and declination
WDS-ID:	04182+5018	WDS designation
Discoverer Code:	BPER	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	26961	HD catalog number
Hipparcos number:	20070	Hipparcos catalog number
V1:	4.60	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BPER

WDS 6th Orbit including measures of BPER

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

Ephemeris of BPER

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.005    117.9
-------------------------

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.