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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:56:00

Orbital Elements for I429

WDS:	I429	WDS ID/Discoverer
P:	69.810	Orbital period (years)
a:	0.096	Semi-major axis (arcseconds)
i:	66.1	Inclination (degrees)
Ω:	320.1	Longitude of ascending node (degrees)
T:	1946.530	Epoch of periastron passage (year)
e:	0.887	Eccentricity
ω:	355.9	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 I429

Position:	181500.43-501829.0	Epoch-2000 right ascension and declination
WDS-ID:	18150-5018	WDS designation
Discoverer Code:	I429	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	166839	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	8.2	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for I429

WDS 6th Orbit including measures of I429

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

Ephemeris of I429

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.093    127.3
-------------------------
1991.0     0.172    141.1
1992.0     0.170    141.4
1993.0     0.168    141.7
1994.0     0.165    142.1
1995.0     0.162    142.4
1996.0     0.159    142.7
1997.0     0.156    143.1
1998.0     0.152    143.5
1999.0     0.148    143.9
2000.0     0.144    144.3
2001.0     0.139    144.7
2002.0     0.134    145.2
2003.0     0.129    145.7
2004.0     0.123    146.3
2005.0     0.117    146.9
2006.0     0.110    147.6
2007.0     0.103    148.4
2008.0     0.096    149.3
2009.0     0.087    150.3
2010.0     0.078    151.6
2011.0     0.068    153.3
2012.0     0.058    155.5
2013.0     0.045    158.9
2014.0     0.032    165.0
2015.0     0.016    182.0
2016.0     0.008    286.6
2017.0     0.008     24.1
2018.0     0.019     96.4
2019.0     0.032    111.1
2020.0     0.045    117.2
2021.0     0.056    120.7
2022.0     0.067    123.1
2023.0     0.076    124.8
2024.0     0.085    126.2
2025.0     0.093    127.3
2026.0     0.100    128.3
2027.0     0.107    129.1
2028.0     0.114    129.8
2029.0     0.120    130.5
2030.0     0.126    131.1
2031.0     0.131    131.6
2032.0     0.136    132.1
2033.0     0.141    132.6
2034.0     0.145    133.0
2035.0     0.149    133.4
2036.0     0.153    133.8
2037.0     0.157    134.2
2038.0     0.160    134.5
2039.0     0.163    134.9
2040.0     0.166    135.2
2041.0     0.168    135.5
2042.0     0.170    135.8
2043.0     0.172    136.1
2044.0     0.174    136.4
2045.0     0.176    136.7
2046.0     0.177    137.0
2047.0     0.178    137.3
2048.0     0.179    137.5
2049.0     0.180    137.8
2050.0     0.180    138.1
2051.0     0.181    138.4
2052.0     0.181    138.6
2053.0     0.181    138.9
2054.0     0.180    139.2
2055.0     0.180    139.5
2056.0     0.179    139.7
2057.0     0.178    140.0
2058.0     0.177    140.3

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.