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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:47:02

Orbital Elements for BUG9

WDS:	BUG9	WDS ID/Discoverer
P:	11.100	Orbital period (years)
a:	0.08	Semi-major axis (arcseconds)
i:	91.3	Inclination (degrees)
Ω:	133.4	Longitude of ascending node (degrees)
T:	2024.519	Epoch of periastron passage (year)
e:	0.48	Eccentricity
ω:	277.0	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 BUG9

Position:	092615.37+584721.2	Epoch-2000 right ascension and declination
WDS-ID:	09263+5847	WDS designation
Discoverer Code:	BUG9	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	17.14	Magnitude of the primary
V2:	17.54	Magnitude of the secondary
Equinox:		Equinox
Date:	2010	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BUG9

WDS 6th Orbit including measures of BUG9

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

Ephemeris of BUG9

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.037    134.3
-------------------------
2020.0     0.041    316.9
2021.0     0.062    315.2
2022.0     0.074    314.4
2023.0     0.070    313.6
2024.0     0.032    312.0
2025.0     0.037    134.3
2026.0     0.065    132.9
2027.0     0.059    131.9
2028.0     0.040    130.2
2029.0     0.015    123.1

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.