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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:43:09

Orbital Elements for A2554

WDS:	A2554	WDS ID/Discoverer
P:	44.110	Orbital period (years)
a:	0.211	Semi-major axis (arcseconds)
i:	159.5	Inclination (degrees)
Ω:	139.9	Longitude of ascending node (degrees)
T:	2021.762	Epoch of periastron passage (year)
e:	0.492	Eccentricity
ω:	189.8	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2554

Position:	085351.95+014928.0	Epoch-2000 right ascension and declination
WDS-ID:	08539+0149	WDS designation
Discoverer Code:	A2554	Discover designation and components
ADS number:	7074	Aitken Double Star catalog
HD number:	76050	HD catalog number
Hipparcos number:	43676	Hipparcos catalog number
V1:	7.44	Magnitude of the primary
V2:	9.64	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2554

WDS 6th Orbit including measures of A2554

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

Ephemeris of A2554

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.132    237.1
-------------------------
2003.0     0.307    120.7
2004.0     0.303    117.5
2005.0     0.298    114.2
2006.0     0.291    110.8
2007.0     0.284    107.2
2008.0     0.275    103.4
2009.0     0.265     99.3
2010.0     0.255     95.0
2011.0     0.243     90.2
2012.0     0.230     84.9
2013.0     0.217     78.9
2014.0     0.202     72.2
2015.0     0.187     64.3
2016.0     0.171     55.1
2017.0     0.156     43.9
2018.0     0.141     30.4
2019.0     0.127     13.7
2020.0     0.116    353.6
2021.0     0.109    330.1
2022.0     0.107    304.5
2023.0     0.110    279.1
2024.0     0.119    256.2
2025.0     0.132    237.1
2026.0     0.147    221.7
2027.0     0.164    209.5
2028.0     0.181    199.5
2029.0     0.198    191.3
2030.0     0.213    184.2
2031.0     0.228    178.2
2032.0     0.242    172.8
2033.0     0.254    168.0
2034.0     0.265    163.6
2035.0     0.275    159.5
2036.0     0.284    155.7
2037.0     0.292    152.1
2038.0     0.298    148.7
2039.0     0.304    145.5
2040.0     0.308    142.3
2041.0     0.311    139.2
2042.0     0.313    136.2
2043.0     0.314    133.2
2044.0     0.314    130.2
2045.0     0.313    127.1
2046.0     0.311    124.1

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.