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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:56:08

Orbital Elements for BAG4

WDS:	BAG4	WDS ID/Discoverer
P:	30.680	Orbital period (years)
a:	0.079	Semi-major axis (arcseconds)
i:	128.0	Inclination (degrees)
Ω:	50.0	Longitude of ascending node (degrees)
T:	1990.960	Epoch of periastron passage (year)
e:	0.045	Eccentricity
ω:	32.0	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BAG4

Position:	040616.41+195228.5	Epoch-2000 right ascension and declination
WDS-ID:	04063+1952	WDS designation
Discoverer Code:	BAG4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	25811	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.9	Magnitude of the primary
V2:	9.1	Magnitude of the secondary
Equinox:		Equinox
Date:	1997	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BAG4

WDS 6th Orbit including measures of BAG4

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

Ephemeris of BAG4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.050    343.7
-------------------------
2010.0     0.054    167.8
2011.0     0.051    151.2
2012.0     0.050    133.1
2013.0     0.052    115.6
2014.0     0.056    100.1
2015.0     0.062     87.3
2016.0     0.067     76.5
2017.0     0.072     67.3
2018.0     0.075     59.0
2019.0     0.076     51.1
2020.0     0.075     43.2
2021.0     0.072     34.8
2022.0     0.067     25.4
2023.0     0.061     14.3
2024.0     0.054      0.6
2025.0     0.050    343.7
2026.0     0.047    324.3
2027.0     0.049    304.6
2028.0     0.053    287.2
2029.0     0.060    272.9
2030.0     0.066    261.5
2031.0     0.072    252.1
2032.0     0.077    244.1
2033.0     0.081    236.9
2034.0     0.082    230.1
2035.0     0.081    223.4
2036.0     0.079    216.4
2037.0     0.075    208.8
2038.0     0.070    200.2
2039.0     0.064    190.0

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.