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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:13:00

Orbital Elements for COU327AB

WDS:	COU327AB	WDS ID/Discoverer
P:	42.460	Orbital period (years)
a:	0.147	Semi-major axis (arcseconds)
i:	85.0	Inclination (degrees)
Ω:	68.0	Longitude of ascending node (degrees)
T:	1986.600	Epoch of periastron passage (year)
e:	0.577	Eccentricity
ω:	303.0	Longitude of periastron (degrees)
Start-Year:	2004.0	Year
End-Year:	2046.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU327AB

Position:	202135.69+192940.1	Epoch-2000 right ascension and declination
WDS-ID:	20216+1930	WDS designation
Discoverer Code:	COU327AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	193797	HD catalog number
Hipparcos number:	100397	Hipparcos catalog number
V1:	9.1	Magnitude of the primary
V2:	9.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2005	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU327AB

WDS 6th Orbit including measures of COU327AB

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

Ephemeris of COU327AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.102    250.0
-------------------------
2004.0     0.087    235.9
2005.0     0.099    237.4
2006.0     0.109    238.6
2007.0     0.119    239.6
2008.0     0.129    240.5
2009.0     0.138    241.2
2010.0     0.146    241.9
2011.0     0.153    242.5
2012.0     0.159    243.0
2013.0     0.165    243.5
2014.0     0.169    244.0
2015.0     0.172    244.4
2016.0     0.174    244.8
2017.0     0.175    245.3
2018.0     0.174    245.7
2019.0     0.171    246.1
2020.0     0.167    246.6
2021.0     0.160    247.1
2022.0     0.151    247.6
2023.0     0.138    248.2
2024.0     0.122    249.0
2025.0     0.102    250.0
2026.0     0.076    251.7
2027.0     0.045    255.4
2028.0     0.009    288.9
2029.0     0.032     59.6
2030.0     0.062     66.0
2031.0     0.078     68.6
2032.0     0.083     70.6
2033.0     0.080     72.5
2034.0     0.074     74.7
2035.0     0.064     77.5
2036.0     0.053     81.3
2037.0     0.042     87.2
2038.0     0.030     97.7
2039.0     0.020    119.8
2040.0     0.017    162.4
2041.0     0.023    199.0
2042.0     0.034    216.2
2043.0     0.046    224.7
2044.0     0.058    229.6
2045.0     0.070    232.8

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.