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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:58:39

Orbital Elements for HDS555

WDS:	HDS555	WDS ID/Discoverer
P:	73.483	Orbital period (years)
a:	0.367	Semi-major axis (arcseconds)
i:	37.6	Inclination (degrees)
Ω:	50.3	Longitude of ascending node (degrees)
T:	2010.968	Epoch of periastron passage (year)
e:	0.436	Eccentricity
ω:	79.1	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 HDS555

Position:	042006.27+310827.9	Epoch-2000 right ascension and declination
WDS-ID:	04201+3108	WDS designation
Discoverer Code:	HDS555	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	27323	HD catalog number
Hipparcos number:	20227	Hipparcos catalog number
V1:	9.05	Magnitude of the primary
V2:	12.98	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS555

WDS 6th Orbit including measures of HDS555

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

Ephemeris of HDS555

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.370    244.9
-------------------------
1989.0     0.385    349.0
1990.0     0.381    352.2
1991.0     0.377    355.5
1992.0     0.373    358.9
1993.0     0.369      2.3
1994.0     0.364      5.8
1995.0     0.359      9.4
1996.0     0.353     13.1
1997.0     0.347     16.9
1998.0     0.339     20.9
1999.0     0.331     25.1
2000.0     0.322     29.5
2001.0     0.312     34.2
2002.0     0.301     39.2
2003.0     0.288     44.6
2004.0     0.274     50.5
2005.0     0.258     57.2
2006.0     0.241     64.7
2007.0     0.223     73.5
2008.0     0.204     83.8
2009.0     0.187     96.1
2010.0     0.173    110.7
2011.0     0.166    127.2
2012.0     0.166    144.5
2013.0     0.174    160.9
2014.0     0.188    175.4
2015.0     0.207    187.4
2016.0     0.227    197.5
2017.0     0.248    205.8
2018.0     0.268    212.9
2019.0     0.287    219.0
2020.0     0.304    224.4
2021.0     0.320    229.2
2022.0     0.335    233.6
2023.0     0.348    237.6
2024.0     0.360    241.4
2025.0     0.370    244.9
2026.0     0.380    248.3
2027.0     0.388    251.4
2028.0     0.395    254.5
2029.0     0.402    257.5
2030.0     0.407    260.3
2031.0     0.412    263.1
2032.0     0.416    265.9
2033.0     0.420    268.6
2034.0     0.422    271.2
2035.0     0.425    273.9
2036.0     0.426    276.5
2037.0     0.428    279.0
2038.0     0.429    281.6
2039.0     0.429    284.2
2040.0     0.429    286.7
2041.0     0.429    289.3
2042.0     0.429    291.8
2043.0     0.428    294.4
2044.0     0.427    297.0
2045.0     0.426    299.5
2046.0     0.425    302.2
2047.0     0.423    304.8
2048.0     0.421    307.4
2049.0     0.420    310.1
2050.0     0.418    312.8
2051.0     0.416    315.5
2052.0     0.414    318.2
2053.0     0.411    321.0
2054.0     0.409    323.8
2055.0     0.406    326.6
2056.0     0.404    329.5
2057.0     0.401    332.4
2058.0     0.399    335.3
2059.0     0.396    338.3
2060.0     0.393    341.3

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.