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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:02:47

Orbital Elements for KUI18

WDS:	KUI18	WDS ID/Discoverer
P:	77.241	Orbital period (years)
a:	0.70201	Semi-major axis (arcseconds)
i:	59.716	Inclination (degrees)
Ω:	170.117	Longitude of ascending node (degrees)
T:	1976.736	Epoch of periastron passage (year)
e:	0.66102	Eccentricity
ω:	24.538	Longitude of periastron (degrees)
Start-Year:	1987.0	Year
End-Year:	2063.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for KUI18

Position:	043810.82-141814.3	Epoch-2000 right ascension and declination
WDS-ID:	04382-1418	WDS designation
Discoverer Code:	KUI18	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	29503	HD catalog number
Hipparcos number:	21594	Hipparcos catalog number
V1:	4.02	Magnitude of the primary
V2:	6.95	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for KUI18

WDS 6th Orbit including measures of KUI18

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

Ephemeris of KUI18

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.950     11.0
-------------------------
1987.0     0.611    335.4
1988.0     0.661    337.6
1989.0     0.707    339.4
1990.0     0.750    341.1
1991.0     0.789    342.5
1992.0     0.826    343.9
1993.0     0.860    345.1
1994.0     0.891    346.2
1995.0     0.920    347.3
1996.0     0.946    348.3
1997.0     0.970    349.2
1998.0     0.992    350.1
1999.0     1.012    351.0
2000.0     1.030    351.8
2001.0     1.045    352.6
2002.0     1.059    353.4
2003.0     1.072    354.2
2004.0     1.082    354.9
2005.0     1.091    355.7
2006.0     1.098    356.4
2007.0     1.103    357.1
2008.0     1.107    357.8
2009.0     1.109    358.5
2010.0     1.110    359.3
2011.0     1.109    360.0
2012.0     1.107      0.7
2013.0     1.103      1.4
2014.0     1.098      2.1
2015.0     1.091      2.8
2016.0     1.083      3.6
2017.0     1.074      4.3
2018.0     1.063      5.1
2019.0     1.051      5.8
2020.0     1.038      6.6
2021.0     1.023      7.5
2022.0     1.007      8.3
2023.0     0.989      9.2
2024.0     0.970     10.1
2025.0     0.950     11.0
2026.0     0.929     12.0
2027.0     0.906     13.0
2028.0     0.882     14.1
2029.0     0.857     15.3
2030.0     0.831     16.5
2031.0     0.803     17.8
2032.0     0.774     19.2
2033.0     0.743     20.7
2034.0     0.712     22.3
2035.0     0.679     24.1
2036.0     0.645     26.1
2037.0     0.610     28.3
2038.0     0.574     30.8
2039.0     0.538     33.6
2040.0     0.500     36.9
2041.0     0.463     40.6
2042.0     0.425     45.0
2043.0     0.388     50.3
2044.0     0.352     56.7
2045.0     0.318     64.5
2046.0     0.289     74.0
2047.0     0.265     85.4
2048.0     0.250     98.5
2049.0     0.244    112.9
2050.0     0.246    127.4
2051.0     0.253    141.4
2052.0     0.258    154.6
2053.0     0.250    168.0
2054.0     0.221    183.5
2055.0     0.179    205.4
2056.0     0.152    238.7
2057.0     0.170    274.1
2058.0     0.224    297.3
2059.0     0.291    310.7
2060.0     0.359    319.0
2061.0     0.424    324.7
2062.0     0.486    328.9

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.