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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:59:03

Orbital Elements for COU1607

WDS:	COU1607	WDS ID/Discoverer
P:	69.400	Orbital period (years)
a:	0.112	Semi-major axis (arcseconds)
i:	87.1	Inclination (degrees)
Ω:	114.9	Longitude of ascending node (degrees)
T:	2021.100	Epoch of periastron passage (year)
e:	0.602	Eccentricity
ω:	184.6	Longitude of periastron (degrees)
Start-Year:	1991.0	Year
End-Year:	2059.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1607

Position:	183933.03+405606.2	Epoch-2000 right ascension and declination
WDS-ID:	18396+4056	WDS designation
Discoverer Code:	COU1607	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	172671	HD catalog number
Hipparcos number:	91491	Hipparcos catalog number
V1:	6.47	Magnitude of the primary
V2:	7.99	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU1607

WDS 6th Orbit including measures of COU1607

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

Ephemeris of COU1607

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.008    317.7
-------------------------
1991.0     0.173    115.5
1992.0     0.171    115.6
1993.0     0.168    115.7
1994.0     0.165    115.8
1995.0     0.162    115.9
1996.0     0.158    116.0
1997.0     0.154    116.1
1998.0     0.150    116.2
1999.0     0.145    116.3
2000.0     0.140    116.5
2001.0     0.134    116.6
2002.0     0.128    116.8
2003.0     0.122    116.9
2004.0     0.115    117.1
2005.0     0.108    117.3
2006.0     0.100    117.6
2007.0     0.092    117.9
2008.0     0.083    118.2
2009.0     0.074    118.6
2010.0     0.064    119.2
2011.0     0.054    119.9
2012.0     0.043    121.1
2013.0     0.032    122.9
2014.0     0.021    126.8
2015.0     0.010    139.9
2016.0     0.005    247.4
2017.0     0.016    283.1
2018.0     0.027    289.3
2019.0     0.036    292.0
2020.0     0.043    293.7
2021.0     0.045    295.0
2022.0     0.041    296.4
2023.0     0.032    298.4
2024.0     0.021    302.3
2025.0     0.008    317.7
2026.0     0.007     82.4
2027.0     0.019    103.2
2028.0     0.032    107.5
2029.0     0.044    109.4
2030.0     0.055    110.5
2031.0     0.066    111.2
2032.0     0.076    111.7
2033.0     0.086    112.1
2034.0     0.095    112.5
2035.0     0.104    112.7
2036.0     0.112    112.9
2037.0     0.119    113.1
2038.0     0.126    113.3
2039.0     0.133    113.5
2040.0     0.139    113.6
2041.0     0.144    113.7
2042.0     0.149    113.9
2043.0     0.154    114.0
2044.0     0.158    114.1
2045.0     0.162    114.2
2046.0     0.165    114.3
2047.0     0.168    114.4
2048.0     0.171    114.5
2049.0     0.173    114.6
2050.0     0.175    114.7
2051.0     0.177    114.7
2052.0     0.178    114.8
2053.0     0.179    114.9
2054.0     0.179    115.0
2055.0     0.179    115.1
2056.0     0.179    115.1
2057.0     0.178    115.2
2058.0     0.177    115.3

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.