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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:34:18

Orbital Elements for COU79

WDS:	COU79	WDS ID/Discoverer
P:	23.608	Orbital period (years)
a:	0.2347	Semi-major axis (arcseconds)
i:	104.437	Inclination (degrees)
Ω:	55.823	Longitude of ascending node (degrees)
T:	1986.182	Epoch of periastron passage (year)
e:	0.68119	Eccentricity
ω:	263.927	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 COU79

Position:	021542.83+250235.7	Epoch-2000 right ascension and declination
WDS-ID:	02157+2503	WDS designation
Discoverer Code:	COU79	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	13872	HD catalog number
Hipparcos number:	10535	Hipparcos catalog number
V1:	6.40	Magnitude of the primary
V2:	6.48	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU79

WDS 6th Orbit including measures of COU79

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

Ephemeris of COU79

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.105    296.6
-------------------------
2014.0     0.195     41.7
2015.0     0.192     37.6
2016.0     0.183     33.3
2017.0     0.171     28.4
2018.0     0.157     22.7
2019.0     0.142     15.9
2020.0     0.127      7.3
2021.0     0.113    356.5
2022.0     0.103    343.2
2023.0     0.097    327.8
2024.0     0.098    311.6
2025.0     0.105    296.6
2026.0     0.116    283.9
2027.0     0.129    273.7
2028.0     0.142    265.3
2029.0     0.154    258.4
2030.0     0.160    252.2
2031.0     0.157    246.1
2032.0     0.133    239.0
2033.0     0.062    222.7
2034.0     0.073     67.2
2035.0     0.147     54.1

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.