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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:05:11

Orbital Elements for HU555AB

WDS:	HU555AB	WDS ID/Discoverer
P:	72.100	Orbital period (years)
a:	0.21	Semi-major axis (arcseconds)
i:	48.7	Inclination (degrees)
Ω:	129.4	Longitude of ascending node (degrees)
T:	1968.100	Epoch of periastron passage (year)
e:	0.44	Eccentricity
ω:	104.0	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 HU555AB

Position:	045616.87+520552.2	Epoch-2000 right ascension and declination
WDS-ID:	04563+5206	WDS designation
Discoverer Code:	HU555AB	Discover designation and components
ADS number:	3520	Aitken Double Star catalog
HD number:	31166	HD catalog number
Hipparcos number:	22951	Hipparcos catalog number
V1:	8.83	Magnitude of the primary
V2:	9.14	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1975	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HU555AB

WDS 6th Orbit including measures of HU555AB

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

Ephemeris of HU555AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.218    115.0
-------------------------
1989.0     0.189      8.0
1990.0     0.189     11.6
1991.0     0.189     15.3
1992.0     0.190     18.9
1993.0     0.190     22.5
1994.0     0.191     26.1
1995.0     0.192     29.7
1996.0     0.193     33.2
1997.0     0.194     36.7
1998.0     0.195     40.2
1999.0     0.197     43.6
2000.0     0.199     46.9
2001.0     0.200     50.2
2002.0     0.202     53.4
2003.0     0.205     56.5
2004.0     0.207     59.6
2005.0     0.209     62.7
2006.0     0.211     65.6
2007.0     0.213     68.5
2008.0     0.216     71.3
2009.0     0.218     74.1
2010.0     0.220     76.8
2011.0     0.222     79.5
2012.0     0.224     82.1
2013.0     0.226     84.7
2014.0     0.227     87.3
2015.0     0.228     89.8
2016.0     0.229     92.3
2017.0     0.230     94.7
2018.0     0.230     97.2
2019.0     0.230     99.7
2020.0     0.230    102.1
2021.0     0.229    104.6
2022.0     0.227    107.1
2023.0     0.225    109.7
2024.0     0.222    112.3
2025.0     0.218    115.0
2026.0     0.214    117.7
2027.0     0.209    120.7
2028.0     0.202    123.8
2029.0     0.195    127.1
2030.0     0.187    130.6
2031.0     0.177    134.6
2032.0     0.166    139.0
2033.0     0.154    144.2
2034.0     0.140    150.2
2035.0     0.126    157.6
2036.0     0.111    167.0
2037.0     0.097    179.2
2038.0     0.085    195.2
2039.0     0.079    214.9
2040.0     0.080    236.0
2041.0     0.087    255.1
2042.0     0.099    270.4
2043.0     0.112    282.3
2044.0     0.125    291.7
2045.0     0.137    299.3
2046.0     0.147    305.8
2047.0     0.156    311.4
2048.0     0.164    316.5
2049.0     0.170    321.2
2050.0     0.174    325.6
2051.0     0.178    329.8
2052.0     0.181    333.9
2053.0     0.183    337.8
2054.0     0.185    341.6
2055.0     0.186    345.4
2056.0     0.187    349.2
2057.0     0.188    352.9
2058.0     0.188    356.6
2059.0     0.188      0.3
2060.0     0.188      3.9

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.