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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:42:27

Orbital Elements for COU1289

WDS:	COU1289	WDS ID/Discoverer
P:	16.090	Orbital period (years)
a:	0.075	Semi-major axis (arcseconds)
i:	113.0	Inclination (degrees)
Ω:	63.2	Longitude of ascending node (degrees)
T:	2001.070	Epoch of periastron passage (year)
e:	0.753	Eccentricity
ω:	154.3	Longitude of periastron (degrees)
Start-Year:	2017.0	Year
End-Year:	2033.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1289

Position:	165822.85+394236.8	Epoch-2000 right ascension and declination
WDS-ID:	16584+3943	WDS designation
Discoverer Code:	COU1289	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	153527	HD catalog number
Hipparcos number:	83064	Hipparcos catalog number
V1:	8.4	Magnitude of the primary
V2:	8.4	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU1289

WDS 6th Orbit including measures of COU1289

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

Ephemeris of COU1289

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.120     74.3
-------------------------
2017.0     0.012    279.6
2018.0     0.017    175.5
2019.0     0.034    111.7
2020.0     0.056     95.0
2021.0     0.076     87.4
2022.0     0.092     82.8
2023.0     0.104     79.4
2024.0     0.113     76.7
2025.0     0.120     74.3
2026.0     0.123     72.1
2027.0     0.122     70.0
2028.0     0.118     67.7
2029.0     0.110     65.3
2030.0     0.097     62.2
2031.0     0.077     57.9
2032.0     0.047     49.2

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.