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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:21:25

Orbital Elements for HO3AB

WDS:	HO3AB	WDS ID/Discoverer
P:	70.340	Orbital period (years)
a:	0.393	Semi-major axis (arcseconds)
i:	112.3	Inclination (degrees)
Ω:	118.9	Longitude of ascending node (degrees)
T:	1983.620	Epoch of periastron passage (year)
e:	0.331	Eccentricity
ω:	137.8	Longitude of periastron (degrees)
Start-Year:	1990.0	Year
End-Year:	2060.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HO3AB

Position:	003329.97+400620.2	Epoch-2000 right ascension and declination
WDS-ID:	00335+4006	WDS designation
Discoverer Code:	HO3AB	Discover designation and components
ADS number:	463	Aitken Double Star catalog
HD number:	2993	HD catalog number
Hipparcos number:	2643	Hipparcos catalog number
V1:	8.09	Magnitude of the primary
V2:	9.72	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HO3AB

WDS 6th Orbit including measures of HO3AB

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

Ephemeris of HO3AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.471    128.9
-------------------------
1990.0     0.288    291.0
1991.0     0.283    287.5
1992.0     0.276    283.9
1993.0     0.266    280.1
1994.0     0.254    275.9
1995.0     0.240    271.3
1996.0     0.226    266.1
1997.0     0.212    260.2
1998.0     0.199    253.5
1999.0     0.187    245.8
2000.0     0.178    237.3
2001.0     0.172    228.0
2002.0     0.169    218.2
2003.0     0.171    208.4
2004.0     0.177    199.0
2005.0     0.186    190.3
2006.0     0.198    182.6
2007.0     0.212    175.9
2008.0     0.228    170.0
2009.0     0.245    164.9
2010.0     0.263    160.5
2011.0     0.281    156.7
2012.0     0.299    153.3
2013.0     0.317    150.4
2014.0     0.335    147.7
2015.0     0.352    145.3
2016.0     0.368    143.1
2017.0     0.384    141.1
2018.0     0.399    139.3
2019.0     0.413    137.5
2020.0     0.425    135.9
2021.0     0.437    134.4
2022.0     0.447    133.0
2023.0     0.457    131.6
2024.0     0.465    130.2
2025.0     0.471    128.9
2026.0     0.476    127.7
2027.0     0.479    126.4
2028.0     0.481    125.2
2029.0     0.481    124.0
2030.0     0.480    122.8
2031.0     0.477    121.5
2032.0     0.471    120.3
2033.0     0.464    119.0
2034.0     0.455    117.6
2035.0     0.444    116.2
2036.0     0.430    114.8
2037.0     0.415    113.2
2038.0     0.397    111.5
2039.0     0.377    109.6
2040.0     0.355    107.5
2041.0     0.330    105.0
2042.0     0.303    102.2
2043.0     0.274     98.8
2044.0     0.244     94.6
2045.0     0.212     89.1
2046.0     0.180     81.7
2047.0     0.150     71.3
2048.0     0.125     56.1
2049.0     0.110     35.1
2050.0     0.111     11.3
2051.0     0.126    350.7
2052.0     0.151    335.7
2053.0     0.179    325.2
2054.0     0.207    317.6
2055.0     0.232    311.8
2056.0     0.253    307.0
2057.0     0.269    302.8
2058.0     0.281    299.1
2059.0     0.287    295.6

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.