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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:02:28

Orbital Elements for RMU5

WDS:	RMU5	WDS ID/Discoverer
P:	28.100	Orbital period (years)
a:	0.215	Semi-major axis (arcseconds)
i:	59.6	Inclination (degrees)
Ω:	118.0	Longitude of ascending node (degrees)
T:	2000.400	Epoch of periastron passage (year)
e:	0.27	Eccentricity
ω:	156.0	Longitude of periastron (degrees)
Start-Year:	2011.0	Year
End-Year:	2039.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RMU5

Position:	190332.24+014908.2	Epoch-2000 right ascension and declination
WDS-ID:	19035+0149	WDS designation
Discoverer Code:	RMU5	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	177178	HD catalog number
Hipparcos number:	93580	Hipparcos catalog number
V1:	5.32	Magnitude of the primary
V2:	9.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RMU5

WDS 6th Orbit including measures of RMU5

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

Ephemeris of RMU5

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.095    195.7
-------------------------
2011.0     0.194     85.9
2012.0     0.216     92.7
2013.0     0.235     98.4
2014.0     0.250    103.3
2015.0     0.261    107.7
2016.0     0.266    111.8
2017.0     0.267    115.9
2018.0     0.261    120.0
2019.0     0.250    124.4
2020.0     0.233    129.3
2021.0     0.210    135.2
2022.0     0.182    142.7
2023.0     0.150    153.2
2024.0     0.119    169.4
2025.0     0.095    195.7
2026.0     0.092    230.3
2027.0     0.111    259.1
2028.0     0.136    278.1
2029.0     0.155    291.6
2030.0     0.161    303.0
2031.0     0.155    314.5
2032.0     0.141    327.6
2033.0     0.125    344.0
2034.0     0.114      4.6
2035.0     0.113     27.5
2036.0     0.125     48.3
2037.0     0.145     64.3
2038.0     0.168     76.2

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.