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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:46:46

Orbital Elements for A351AB

WDS:	A351AB	WDS ID/Discoverer
P:	59.000	Orbital period (years)
a:	0.65	Semi-major axis (arcseconds)
i:	81.0	Inclination (degrees)
Ω:	66.0	Longitude of ascending node (degrees)
T:	1972.000	Epoch of periastron passage (year)
e:	0.19	Eccentricity
ω:	64.0	Longitude of periastron (degrees)
Start-Year:	1996.0	Year
End-Year:	2054.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A351AB

Position:	172920.05+292330.8	Epoch-2000 right ascension and declination
WDS-ID:	17293+2924	WDS designation
Discoverer Code:	A351AB	Discover designation and components
ADS number:	10585	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	85582	Hipparcos catalog number
V1:	9.70	Magnitude of the primary
V2:	9.95	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A351AB

WDS 6th Orbit including measures of A351AB

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

Ephemeris of A351AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.550     67.8
-------------------------
1996.0     0.583    253.6
1997.0     0.548    254.8
1998.0     0.510    256.2
1999.0     0.469    257.9
2000.0     0.426    259.9
2001.0     0.380    262.3
2002.0     0.332    265.5
2003.0     0.284    269.7
2004.0     0.235    275.6
2005.0     0.189    284.5
2006.0     0.149    298.7
2007.0     0.123    320.8
2008.0     0.121    348.6
2009.0     0.144     12.1
2010.0     0.182     27.4
2011.0     0.227     37.1
2012.0     0.275     43.4
2013.0     0.322     47.9
2014.0     0.369     51.2
2015.0     0.413     53.8
2016.0     0.454     55.9
2017.0     0.490     57.7
2018.0     0.522     59.2
2019.0     0.548     60.6
2020.0     0.568     61.9
2021.0     0.581     63.1
2022.0     0.586     64.2
2023.0     0.583     65.4
2024.0     0.571     66.6
2025.0     0.550     67.8
2026.0     0.520     69.2
2027.0     0.480     70.8
2028.0     0.431     72.7
2029.0     0.375     75.1
2030.0     0.311     78.5
2031.0     0.242     83.8
2032.0     0.172     93.3
2033.0     0.110    114.7
2034.0     0.084    162.8
2035.0     0.124    203.8
2036.0     0.191    220.6
2037.0     0.262    228.5
2038.0     0.331    233.1
2039.0     0.396    236.1
2040.0     0.456    238.3
2041.0     0.509    240.0
2042.0     0.556    241.4
2043.0     0.596    242.6
2044.0     0.629    243.6
2045.0     0.656    244.6
2046.0     0.675    245.5
2047.0     0.688    246.3
2048.0     0.694    247.2
2049.0     0.694    248.0
2050.0     0.688    248.8
2051.0     0.677    249.7
2052.0     0.661    250.5
2053.0     0.639    251.5

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.