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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:05:15

Orbital Elements for BRC4AA,AB

WDS:	BRC4AA,AB	WDS ID/Discoverer
P:	8.980	Orbital period (years)
a:	0.062	Semi-major axis (arcseconds)
i:	81.7	Inclination (degrees)
Ω:	184.2	Longitude of ascending node (degrees)
T:	2023.170	Epoch of periastron passage (year)
e:	0.213	Eccentricity
ω:	269.6	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BRC4AA,AB

Position:	112518.06-845716.4	Epoch-2000 right ascension and declination
WDS-ID:	11253-8457	WDS designation
Discoverer Code:	BRC4AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	99827	HD catalog number
Hipparcos number:	55746	Hipparcos catalog number
V1:	7.7	Magnitude of the primary
V2:	8.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for BRC4AA,AB

WDS 6th Orbit including measures of BRC4AA,AB

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

Ephemeris of BRC4AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.060    185.3
-------------------------
2021.0     0.060      1.0
2022.0     0.051      7.4
2023.0     0.012     40.5
2024.0     0.040    177.2
2025.0     0.060    185.3
2026.0     0.051    191.8
2027.0     0.025    208.0
2028.0     0.016    320.8

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.