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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:54:03

Orbital Elements for COU1786AA,AB

WDS:	COU1786AA,AB	WDS ID/Discoverer
P:	56.970	Orbital period (years)
a:	0.148	Semi-major axis (arcseconds)
i:	42.3	Inclination (degrees)
Ω:	202.1	Longitude of ascending node (degrees)
T:	2045.610	Epoch of periastron passage (year)
e:	0.304	Eccentricity
ω:	332.8	Longitude of periastron (degrees)
Start-Year:	1997.0	Year
End-Year:	2053.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1786AA,AB

Position:	180416.91+420545.0	Epoch-2000 right ascension and declination
WDS-ID:	18043+4206	WDS designation
Discoverer Code:	COU1786AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	165503	HD catalog number
Hipparcos number:	88498	Hipparcos catalog number
V1:	8.33	Magnitude of the primary
V2:	9.11	Magnitude of the secondary
Equinox:		Equinox
Date:	2007	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU1786AA,AB

WDS 6th Orbit including measures of COU1786AA,AB

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

Ephemeris of COU1786AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.183     23.3
-------------------------
1997.0     0.108    253.5
1998.0     0.108    261.9
1999.0     0.109    270.2
2000.0     0.110    278.3
2001.0     0.113    286.2
2002.0     0.116    293.6
2003.0     0.120    300.6
2004.0     0.124    307.2
2005.0     0.129    313.2
2006.0     0.134    318.8
2007.0     0.140    324.0
2008.0     0.145    328.8
2009.0     0.151    333.3
2010.0     0.156    337.5
2011.0     0.161    341.4
2012.0     0.166    345.0
2013.0     0.170    348.5
2014.0     0.174    351.8
2015.0     0.178    354.9
2016.0     0.181    358.0
2017.0     0.183      0.9
2018.0     0.185      3.8
2019.0     0.187      6.6
2020.0     0.188      9.4
2021.0     0.188     12.1
2022.0     0.188     14.9
2023.0     0.187     17.7
2024.0     0.185     20.5
2025.0     0.183     23.3
2026.0     0.180     26.3
2027.0     0.176     29.4
2028.0     0.172     32.6
2029.0     0.167     36.0
2030.0     0.161     39.6
2031.0     0.154     43.6
2032.0     0.147     47.9
2033.0     0.139     52.6
2034.0     0.131     58.0
2035.0     0.123     64.0
2036.0     0.114     71.0
2037.0     0.106     79.1
2038.0     0.098     88.4
2039.0     0.092     99.2
2040.0     0.087    111.4
2041.0     0.085    124.6
2042.0     0.085    138.1
2043.0     0.087    151.3
2044.0     0.091    163.7
2045.0     0.095    174.9
2046.0     0.100    185.2
2047.0     0.103    194.6
2048.0     0.106    203.5
2049.0     0.108    212.0
2050.0     0.109    220.4
2051.0     0.109    228.6
2052.0     0.108    236.9

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.