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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:42:30

Orbital Elements for A2551

WDS:	A2551	WDS ID/Discoverer
P:	73.310	Orbital period (years)
a:	0.133	Semi-major axis (arcseconds)
i:	22.8	Inclination (degrees)
Ω:	182.1	Longitude of ascending node (degrees)
T:	1952.630	Epoch of periastron passage (year)
e:	0.619	Eccentricity
ω:	52.3	Longitude of periastron (degrees)
Start-Year:	1989.0	Year
End-Year:	2061.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2551

Position:	084836.68+023635.8	Epoch-2000 right ascension and declination
WDS-ID:	08486+0237	WDS designation
Discoverer Code:	A2551	Discover designation and components
ADS number:	7010	Aitken Double Star catalog
HD number:	75192	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.6	Magnitude of the primary
V2:	10.3	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2016	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2551

WDS 6th Orbit including measures of A2551

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

Ephemeris of A2551

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.052    208.1
-------------------------
1989.0     0.205     51.7
1990.0     0.205     53.2
1991.0     0.204     54.7
1992.0     0.203     56.2
1993.0     0.202     57.8
1994.0     0.201     59.3
1995.0     0.199     60.9
1996.0     0.197     62.5
1997.0     0.195     64.1
1998.0     0.193     65.8
1999.0     0.191     67.5
2000.0     0.188     69.2
2001.0     0.185     71.0
2002.0     0.182     72.9
2003.0     0.179     74.8
2004.0     0.176     76.8
2005.0     0.172     78.9
2006.0     0.168     81.1
2007.0     0.164     83.3
2008.0     0.160     85.7
2009.0     0.155     88.3
2010.0     0.150     91.0
2011.0     0.145     93.9
2012.0     0.140     97.0
2013.0     0.134    100.3
2014.0     0.128    104.0
2015.0     0.122    108.0
2016.0     0.116    112.4
2017.0     0.109    117.4
2018.0     0.102    123.0
2019.0     0.095    129.5
2020.0     0.088    137.0
2021.0     0.080    145.9
2022.0     0.073    156.7
2023.0     0.065    170.1
2024.0     0.058    186.9
2025.0     0.052    208.1
2026.0     0.048    233.7
2027.0     0.049    260.9
2028.0     0.054    284.9
2029.0     0.062    303.7
2030.0     0.072    317.8
2031.0     0.082    328.5
2032.0     0.091    336.9
2033.0     0.101    343.8
2034.0     0.109    349.5
2035.0     0.118    354.4
2036.0     0.125    358.7
2037.0     0.133      2.4
2038.0     0.140      5.8
2039.0     0.146      8.9
2040.0     0.152     11.8
2041.0     0.157     14.4
2042.0     0.163     16.8
2043.0     0.167     19.2
2044.0     0.172     21.3
2045.0     0.176     23.4
2046.0     0.180     25.4
2047.0     0.183     27.3
2048.0     0.187     29.1
2049.0     0.190     30.9
2050.0     0.192     32.6
2051.0     0.195     34.3
2052.0     0.197     36.0
2053.0     0.199     37.6
2054.0     0.200     39.1
2055.0     0.202     40.7
2056.0     0.203     42.2
2057.0     0.204     43.8
2058.0     0.205     45.3
2059.0     0.205     46.8
2060.0     0.205     48.2

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.