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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:42:30

Orbital Elements for BU720B

WDS:	BU720B	WDS ID/Discoverer
P:	4.214	Orbital period (years)
a:	0.000322	Semi-major axis (arcseconds)
i:	66.6	Inclination (degrees)
Ω:	128.3	Longitude of ascending node (degrees)
T:	2004.961	Epoch of periastron passage (year)
e:	0.0	Eccentricity
ω:	0.0	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 BU720B

Position:	233357.15+311931.2	Epoch-2000 right ascension and declination
WDS-ID:	23340+3120	WDS designation
Discoverer Code:	BU720B	Discover designation and components
ADS number:	16836	Aitken Double Star catalog
HD number:	221673	HD catalog number
Hipparcos number:	116310	Hipparcos catalog number
V1:	6.11	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU720B

WDS 6th Orbit including measures of BU720B

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

Ephemeris of BU720B

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.000     43.5
-------------------------
2023.0     0.000    244.8
2024.0     0.000    310.9
2025.0     0.000     43.5
2026.0     0.000    127.3

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.