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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:13:54

Orbital Elements for MCA18AA,AB

WDS:	MCA18AA,AB	WDS ID/Discoverer
P:	9.414	Orbital period (years)
a:	0.0472	Semi-major axis (arcseconds)
i:	103.5	Inclination (degrees)
Ω:	125.3	Longitude of ascending node (degrees)
T:	2011.040	Epoch of periastron passage (year)
e:	0.361	Eccentricity
ω:	12.6	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 MCA18AA,AB

Position:	052428.62-022349.7	Epoch-2000 right ascension and declination
WDS-ID:	05245-0224	WDS designation
Discoverer Code:	MCA18AA,AB	Discover designation and components
ADS number:	4002	Aitken Double Star catalog
HD number:	35411	HD catalog number
Hipparcos number:	25281	Hipparcos catalog number
V1:	3.8	Magnitude of the primary
V2:	5.3	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for MCA18AA,AB

WDS 6th Orbit including measures of MCA18AA,AB

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

Ephemeris of MCA18AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.063    303.1
-------------------------
2021.0     0.019    105.0
2022.0     0.020    333.4
2023.0     0.046    314.2
2024.0     0.061    307.8
2025.0     0.063    303.1
2026.0     0.055    297.9
2027.0     0.038    289.3
2028.0     0.014    253.8

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.