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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:51:28

Orbital Elements for HDS433AB

WDS:	HDS433AB	WDS ID/Discoverer
P:	50.810	Orbital period (years)
a:	0.439	Semi-major axis (arcseconds)
i:	26.7	Inclination (degrees)
Ω:	109.4	Longitude of ascending node (degrees)
T:	2008.430	Epoch of periastron passage (year)
e:	0.571	Eccentricity
ω:	8.0	Longitude of periastron (degrees)
Start-Year:	2000.0	Year
End-Year:	2050.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS433AB

Position:	032710.12+094358.0	Epoch-2000 right ascension and declination
WDS-ID:	03272+0944	WDS designation
Discoverer Code:	HDS433AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	21364	HD catalog number
Hipparcos number:	16083	Hipparcos catalog number
V1:	3.74	Magnitude of the primary
V2:	7.55	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS433AB

WDS 6th Orbit including measures of HDS433AB

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

Ephemeris of HDS433AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.624    276.7
-------------------------
2000.0     0.413    347.8
2001.0     0.381    354.2
2002.0     0.347      1.8
2003.0     0.313     11.0
2004.0     0.279     22.5
2005.0     0.248     37.0
2006.0     0.221     55.4
2007.0     0.201     78.1
2008.0     0.190    104.5
2009.0     0.188    132.8
2010.0     0.197    160.1
2011.0     0.219    183.5
2012.0     0.250    201.9
2013.0     0.286    215.9
2014.0     0.324    226.7
2015.0     0.361    235.3
2016.0     0.397    242.3
2017.0     0.431    248.2
2018.0     0.463    253.2
2019.0     0.492    257.6
2020.0     0.520    261.5
2021.0     0.545    265.0
2022.0     0.568    268.3
2023.0     0.589    271.3
2024.0     0.607    274.1
2025.0     0.624    276.7
2026.0     0.639    279.2
2027.0     0.651    281.6
2028.0     0.662    283.9
2029.0     0.671    286.2
2030.0     0.678    288.4
2031.0     0.683    290.5
2032.0     0.687    292.7
2033.0     0.688    294.8
2034.0     0.688    296.9
2035.0     0.686    299.0
2036.0     0.682    301.2
2037.0     0.677    303.3
2038.0     0.670    305.5
2039.0     0.661    307.8
2040.0     0.650    310.1
2041.0     0.637    312.6
2042.0     0.622    315.1
2043.0     0.606    317.7
2044.0     0.588    320.5
2045.0     0.568    323.5
2046.0     0.546    326.8
2047.0     0.522    330.3
2048.0     0.496    334.2
2049.0     0.468    338.5

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.