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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:34:03

Orbital Elements for COU2388

WDS:	COU2388	WDS ID/Discoverer
P:	32.820	Orbital period (years)
a:	0.2163	Semi-major axis (arcseconds)
i:	111.1	Inclination (degrees)
Ω:	17.9	Longitude of ascending node (degrees)
T:	2003.940	Epoch of periastron passage (year)
e:	0.276	Eccentricity
ω:	13.2	Longitude of periastron (degrees)
Start-Year:	2009.0	Year
End-Year:	2041.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU2388

Position:	154628.21+504759.8	Epoch-2000 right ascension and declination
WDS-ID:	15465+5048	WDS designation
Discoverer Code:	COU2388	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	141373	HD catalog number
Hipparcos number:	77263	Hipparcos catalog number
V1:	9.61	Magnitude of the primary
V2:	9.72	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU2388

WDS 6th Orbit including measures of COU2388

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

Ephemeris of COU2388

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.198    178.5
-------------------------
2009.0     0.077    263.1
2010.0     0.103    240.3
2011.0     0.135    227.6
2012.0     0.166    219.7
2013.0     0.194    214.2
2014.0     0.219    210.0
2015.0     0.239    206.7
2016.0     0.255    203.7
2017.0     0.266    201.1
2018.0     0.272    198.7
2019.0     0.274    196.3
2020.0     0.272    193.9
2021.0     0.265    191.5
2022.0     0.254    188.8
2023.0     0.239    185.9
2024.0     0.220    182.5
2025.0     0.198    178.5
2026.0     0.173    173.3
2027.0     0.146    166.3
2028.0     0.119    156.1
2029.0     0.094    140.2
2030.0     0.078    115.6
2031.0     0.079     85.7
2032.0     0.094     61.3
2033.0     0.117     45.1
2034.0     0.138     34.2
2035.0     0.153     25.9
2036.0     0.158     18.6
2037.0     0.150     11.2
2038.0     0.131      2.3
2039.0     0.105    349.4
2040.0     0.079    327.6

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.