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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:59:27

Orbital Elements for HU304

WDS:	HU304	WDS ID/Discoverer
P:	54.770	Orbital period (years)
a:	0.188	Semi-major axis (arcseconds)
i:	34.2	Inclination (degrees)
Ω:	239.8	Longitude of ascending node (degrees)
T:	1937.240	Epoch of periastron passage (year)
e:	0.72	Eccentricity
ω:	152.0	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU304

Position:	042351.84+092739.5	Epoch-2000 right ascension and declination
WDS-ID:	04239+0928	WDS designation
Discoverer Code:	HU304	Discover designation and components
ADS number:	3182	Aitken Double Star catalog
HD number:	27820	HD catalog number
Hipparcos number:	20522	Hipparcos catalog number
V1:	5.8	Magnitude of the primary
V2:	5.9	Magnitude of the secondary
Equinox:		Equinox
Date:	1997	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HU304

WDS 6th Orbit including measures of HU304

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

Ephemeris of HU304

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.308    223.7
-------------------------
1998.0     0.137    162.6
1999.0     0.153    169.0
2000.0     0.167    174.2
2001.0     0.181    178.6
2002.0     0.194    182.4
2003.0     0.207    185.7
2004.0     0.218    188.6
2005.0     0.229    191.3
2006.0     0.240    193.7
2007.0     0.249    196.0
2008.0     0.258    198.0
2009.0     0.266    200.0
2010.0     0.273    201.8
2011.0     0.280    203.6
2012.0     0.286    205.2
2013.0     0.292    206.8
2014.0     0.296    208.4
2015.0     0.301    209.9
2016.0     0.304    211.3
2017.0     0.307    212.7
2018.0     0.310    214.1
2019.0     0.311    215.5
2020.0     0.312    216.9
2021.0     0.313    218.3
2022.0     0.313    219.6
2023.0     0.312    221.0
2024.0     0.311    222.4
2025.0     0.308    223.7
2026.0     0.306    225.2
2027.0     0.302    226.6
2028.0     0.298    228.1
2029.0     0.293    229.6
2030.0     0.287    231.2
2031.0     0.280    232.9
2032.0     0.273    234.6
2033.0     0.265    236.4
2034.0     0.255    238.4
2035.0     0.245    240.5
2036.0     0.233    242.9
2037.0     0.221    245.5
2038.0     0.207    248.4
2039.0     0.192    251.7
2040.0     0.175    255.7
2041.0     0.156    260.6
2042.0     0.136    266.8
2043.0     0.114    275.5
2044.0     0.090    288.5
2045.0     0.066    311.3
2046.0     0.050    353.6
2047.0     0.053     47.1
2048.0     0.064     87.2
2049.0     0.077    114.6
2050.0     0.092    133.4
2051.0     0.109    146.8

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.