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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:37:28

Orbital Elements for MCA73

WDS:	MCA73	WDS ID/Discoverer
P:	9.479	Orbital period (years)
a:	0.046	Semi-major axis (arcseconds)
i:	29.8	Inclination (degrees)
Ω:	40.9	Longitude of ascending node (degrees)
T:	2010.039	Epoch of periastron passage (year)
e:	0.862	Eccentricity
ω:	70.7	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 MCA73

Position:	225328.69-113659.5	Epoch-2000 right ascension and declination
WDS-ID:	22535-1137	WDS designation
Discoverer Code:	MCA73	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	216494	HD catalog number
Hipparcos number:	113031	Hipparcos catalog number
V1:	5.8	Magnitude of the primary
V2:	6.4	Magnitude of the secondary
Equinox:	2000	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 MCA73

WDS 6th Orbit including measures of MCA73

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

Ephemeris of MCA73

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.074    293.6
-------------------------
2021.0     0.052    263.6
2022.0     0.066    273.7
2023.0     0.073    281.0
2024.0     0.076    287.3
2025.0     0.074    293.6
2026.0     0.068    300.6
2027.0     0.057    309.6
2028.0     0.039    325.4

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.