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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:32:13

Orbital Elements for BUG3

WDS:	BUG3	WDS ID/Discoverer
P:	20.380	Orbital period (years)
a:	0.21392	Semi-major axis (arcseconds)
i:	85.55	Inclination (degrees)
Ω:	13.61	Longitude of ascending node (degrees)
T:	2029.721	Epoch of periastron passage (year)
e:	0.0058	Eccentricity
ω:	80.0	Longitude of periastron (degrees)
Start-Year:	2015.0	Year
End-Year:	2035.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BUG3

Position:	153449.84-295227.4	Epoch-2000 right ascension and declination
WDS-ID:	15348-2952	WDS designation
Discoverer Code:	BUG3	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	15.5 k	Magnitude of the primary
V2:	16.0 k	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BUG3

WDS 6th Orbit including measures of BUG3

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

Ephemeris of BUG3

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.213     13.3
-------------------------
2015.0     0.214    193.7
2016.0     0.204    195.1
2017.0     0.175    196.8
2018.0     0.129    199.5
2019.0     0.073    206.1
2020.0     0.018    261.4
2021.0     0.060    358.1
2022.0     0.118      6.8
2023.0     0.166     10.0
2024.0     0.199     11.8
2025.0     0.213     13.3
2026.0     0.207     14.7
2027.0     0.182     16.3
2028.0     0.139     18.8
2029.0     0.084     24.0
2030.0     0.025     55.1
2031.0     0.050    174.8
2032.0     0.110    186.2
2033.0     0.160    189.7
2034.0     0.196    191.7

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.