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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:37:42

Orbital Elements for COU1511

WDS:	COU1511	WDS ID/Discoverer
P:	22.180	Orbital period (years)
a:	0.124	Semi-major axis (arcseconds)
i:	147.0	Inclination (degrees)
Ω:	217.2	Longitude of ascending node (degrees)
T:	1988.640	Epoch of periastron passage (year)
e:	0.474	Eccentricity
ω:	287.0	Longitude of periastron (degrees)
Start-Year:	2014.0	Year
End-Year:	2036.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1511

Position:	024128.89+405250.8	Epoch-2000 right ascension and declination
WDS-ID:	02415+4053	WDS designation
Discoverer Code:	COU1511	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	16656	HD catalog number
Hipparcos number:	12552	Hipparcos catalog number
V1:	8.7	Magnitude of the primary
V2:	8.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1996	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU1511

WDS 6th Orbit including measures of COU1511

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

Ephemeris of COU1511

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.156     84.1
-------------------------
2014.0     0.107    187.4
2015.0     0.117    172.7
2016.0     0.126    160.3
2017.0     0.134    149.4
2018.0     0.140    139.6
2019.0     0.146    130.6
2020.0     0.150    122.1
2021.0     0.154    114.2
2022.0     0.156    106.5
2023.0     0.158     99.0
2024.0     0.157     91.6
2025.0     0.156     84.1
2026.0     0.152     76.3
2027.0     0.146     68.1
2028.0     0.137     58.9
2029.0     0.125     48.2
2030.0     0.109     34.8
2031.0     0.087     15.5
2032.0     0.064    342.6
2033.0     0.056    287.2
2034.0     0.071    238.7
2035.0     0.090    209.9

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.