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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:16:31

Orbital Elements for HU39

WDS:	HU39	WDS ID/Discoverer
P:	47.170	Orbital period (years)
a:	0.267	Semi-major axis (arcseconds)
i:	99.2	Inclination (degrees)
Ω:	41.0	Longitude of ascending node (degrees)
T:	1975.230	Epoch of periastron passage (year)
e:	0.26	Eccentricity
ω:	195.1	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU39

Position:	054710.18+215231.6	Epoch-2000 right ascension and declination
WDS-ID:	05472+2153	WDS designation
Discoverer Code:	HU39	Discover designation and components
ADS number:	4373	Aitken Double Star catalog
HD number:	38493	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.1	Magnitude of the primary
V2:	9.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2020	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HU39

WDS 6th Orbit including measures of HU39

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

Ephemeris of HU39

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.136    210.5
-------------------------
2002.0     0.289     35.7
2003.0     0.272     34.7
2004.0     0.253     33.4
2005.0     0.232     32.0
2006.0     0.208     30.3
2007.0     0.182     28.1
2008.0     0.155     25.1
2009.0     0.126     20.8
2010.0     0.097     13.9
2011.0     0.069      1.3
2012.0     0.047    334.7
2013.0     0.045    291.0
2014.0     0.063    259.9
2015.0     0.090    245.0
2016.0     0.118    237.1
2017.0     0.144    232.2
2018.0     0.167    228.7
2019.0     0.184    226.0
2020.0     0.196    223.7
2021.0     0.199    221.6
2022.0     0.195    219.4
2023.0     0.182    217.1
2024.0     0.162    214.3
2025.0     0.136    210.5
2026.0     0.105    204.7
2027.0     0.073    193.7
2028.0     0.045    166.9
2029.0     0.040    111.8
2030.0     0.065     77.4
2031.0     0.098     64.0
2032.0     0.131     57.5
2033.0     0.163     53.6
2034.0     0.194     50.9
2035.0     0.221     49.0
2036.0     0.246     47.4
2037.0     0.267     46.1
2038.0     0.286     45.1
2039.0     0.302     44.1
2040.0     0.314     43.2
2041.0     0.323     42.4
2042.0     0.330     41.6
2043.0     0.333     40.8
2044.0     0.333     40.1
2045.0     0.331     39.3
2046.0     0.325     38.5
2047.0     0.317     37.7

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.