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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:47:45

Orbital Elements for MCY4

WDS:	MCY4	WDS ID/Discoverer
P:	8.596	Orbital period (years)
a:	0.4098	Semi-major axis (arcseconds)
i:	130.679	Inclination (degrees)
Ω:	236.86	Longitude of ascending node (degrees)
T:	2012.276	Epoch of periastron passage (year)
e:	0.93912	Eccentricity
ω:	170.21	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 MCY4

Position:	173456.06+123336.1	Epoch-2000 right ascension and declination
WDS-ID:	17349+1234	WDS designation
Discoverer Code:	MCY4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	159561	HD catalog number
Hipparcos number:	86032	Hipparcos catalog number
V1:	2.10	Magnitude of the primary
V2:	5.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2019	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for MCY4

WDS 6th Orbit including measures of MCY4

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

Ephemeris of MCY4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.786    243.7
-------------------------
2021.0     0.085    287.6
2022.0     0.449    255.0
2023.0     0.637    249.6
2024.0     0.743    246.4
2025.0     0.786    243.7
2026.0     0.773    241.1
2027.0     0.699    238.3
2028.0     0.550    234.3

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.