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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:37:45

Orbital Elements for BD+221854

WDS:	BD+221854	WDS ID/Discoverer
P:	4.611	Orbital period (years)
a:	0.0195	Semi-major axis (arcseconds)
i:	68.0	Inclination (degrees)
Ω:	58.0	Longitude of ascending node (degrees)
T:	1993.759	Epoch of periastron passage (year)
e:	0.54	Eccentricity
ω:	88.0	Longitude of periastron (degrees)
Start-Year:	2023.0	Year
End-Year:	2027.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BD+221854

Position:	080634.49+222724.7	Epoch-2000 right ascension and declination
WDS-ID:	08066+2227	WDS designation
Discoverer Code:	BD+221854	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	66948	HD catalog number
Hipparcos number:	39681	Hipparcos catalog number
V1:	7.19	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:		Flags

Double Star Orbit for BD+221854

WDS 6th Orbit including measures of BD+221854

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

Ephemeris of BD+221854

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.016     34.0
-------------------------
2023.0     0.015    279.1
2024.0     0.011    342.6
2025.0     0.016     34.0
2026.0     0.004    117.8

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.