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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:51:33

Orbital Elements for COU1145

WDS:	COU1145	WDS ID/Discoverer
P:	20.700	Orbital period (years)
a:	0.1788	Semi-major axis (arcseconds)
i:	110.28	Inclination (degrees)
Ω:	136.34	Longitude of ascending node (degrees)
T:	1988.724	Epoch of periastron passage (year)
e:	0.6081	Eccentricity
ω:	261.11	Longitude of periastron (degrees)
Start-Year:	2015.0	Year
End-Year:	2035.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1145

Position:	174858.27+370343.0	Epoch-2000 right ascension and declination
WDS-ID:	17490+3704	WDS designation
Discoverer Code:	COU1145	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	162338	HD catalog number
Hipparcos number:	87204	Hipparcos catalog number
V1:	7.82	Magnitude of the primary
V2:	8.32	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 COU1145

WDS 6th Orbit including measures of COU1145

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

Ephemeris of COU1145

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.118    355.2
-------------------------
2015.0     0.161    112.0
2016.0     0.153    105.8
2017.0     0.141     98.8
2018.0     0.129     90.3
2019.0     0.116     80.1
2020.0     0.106     67.6
2021.0     0.099     52.9
2022.0     0.097     37.0
2023.0     0.101     21.3
2024.0     0.108      7.2
2025.0     0.118    355.2
2026.0     0.127    345.0
2027.0     0.131    335.9
2028.0     0.126    326.8
2029.0     0.100    315.2
2030.0     0.033    272.7
2031.0     0.077    149.1
2032.0     0.131    134.8
2033.0     0.156    127.5
2034.0     0.165    121.6

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.