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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:10:34

Orbital Elements for MCA37

WDS:	MCA37	WDS ID/Discoverer
P:	13.100	Orbital period (years)
a:	0.135	Semi-major axis (arcseconds)
i:	50.0	Inclination (degrees)
Ω:	173.0	Longitude of ascending node (degrees)
T:	1990.200	Epoch of periastron passage (year)
e:	0.08	Eccentricity
ω:	4.0	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MCA37

Position:	121954.39-004000.3	Epoch-2000 right ascension and declination
WDS-ID:	12199-0040	WDS designation
Discoverer Code:	MCA37	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	107259	HD catalog number
Hipparcos number:	60129	Hipparcos catalog number
V1:	3.89	Magnitude of the primary
V2:	5.9	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 MCA37

WDS 6th Orbit including measures of MCA37

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

Ephemeris of MCA37

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.112     33.6
-------------------------
2019.0     0.086    254.3
2020.0     0.097    294.9
2021.0     0.121    322.4
2022.0     0.141    340.9
2023.0     0.145    356.3
2024.0     0.134     12.5
2025.0     0.112     33.6
2026.0     0.090     65.9
2027.0     0.089    107.7
2028.0     0.108    141.4
2029.0     0.123    165.1
2030.0     0.120    186.3

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.