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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:41:17

Orbital Elements for COU439AB

WDS:	COU439AB	WDS ID/Discoverer
P:	64.330	Orbital period (years)
a:	0.188	Semi-major axis (arcseconds)
i:	51.4	Inclination (degrees)
Ω:	13.4	Longitude of ascending node (degrees)
T:	1955.870	Epoch of periastron passage (year)
e:	0.314	Eccentricity
ω:	38.1	Longitude of periastron (degrees)
Start-Year:	1993.0	Year
End-Year:	2057.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU439AB

Position:	231951.55+284349.4	Epoch-2000 right ascension and declination
WDS-ID:	23199+2844	WDS designation
Discoverer Code:	COU439AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	219963	HD catalog number
Hipparcos number:	115189	Hipparcos catalog number
V1:	9.24	Magnitude of the primary
V2:	9.94	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for COU439AB

WDS 6th Orbit including measures of COU439AB

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

Ephemeris of COU439AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.088    101.7
-------------------------
1993.0     0.189    233.6
1994.0     0.183    237.0
1995.0     0.176    240.6
1996.0     0.169    244.6
1997.0     0.163    248.8
1998.0     0.156    253.4
1999.0     0.150    258.4
2000.0     0.145    263.8
2001.0     0.140    269.6
2002.0     0.135    275.8
2003.0     0.132    282.4
2004.0     0.129    289.3
2005.0     0.127    296.4
2006.0     0.127    303.7
2007.0     0.127    311.0
2008.0     0.128    318.2
2009.0     0.130    325.2
2010.0     0.133    332.0
2011.0     0.135    338.5
2012.0     0.137    344.8
2013.0     0.139    351.0
2014.0     0.140    357.0
2015.0     0.140      3.0
2016.0     0.138      9.0
2017.0     0.135     15.3
2018.0     0.130     22.0
2019.0     0.123     29.3
2020.0     0.115     37.7
2021.0     0.106     47.3
2022.0     0.098     58.6
2023.0     0.091     71.8
2024.0     0.088     86.5
2025.0     0.088    101.7
2026.0     0.093    116.1
2027.0     0.101    128.8
2028.0     0.111    139.3
2029.0     0.122    148.0
2030.0     0.134    155.2
2031.0     0.146    161.1
2032.0     0.158    166.2
2033.0     0.169    170.6
2034.0     0.179    174.5
2035.0     0.189    177.9
2036.0     0.197    181.1
2037.0     0.205    184.0
2038.0     0.211    186.7
2039.0     0.217    189.3
2040.0     0.222    191.7
2041.0     0.226    194.0
2042.0     0.229    196.3
2043.0     0.231    198.5
2044.0     0.233    200.7
2045.0     0.233    202.8
2046.0     0.233    205.0
2047.0     0.232    207.1
2048.0     0.231    209.3
2049.0     0.228    211.5
2050.0     0.226    213.8
2051.0     0.222    216.1
2052.0     0.218    218.6
2053.0     0.213    221.1
2054.0     0.208    223.7
2055.0     0.203    226.5
2056.0     0.197    229.4

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.