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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:17:38

Orbital Elements for ZETUMA

WDS:	ZETUMA	WDS ID/Discoverer
P:	36.500	Orbital period (years)
a:	0.78	Semi-major axis (arcseconds)
i:	93.0	Inclination (degrees)
Ω:	32.0	Longitude of ascending node (degrees)
T:	1994.800	Epoch of periastron passage (year)
e:	0.6	Eccentricity
ω:	287.0	Longitude of periastron (degrees)
Start-Year:	2007.0	Year
End-Year:	2043.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ZETUMA

Position:	132355.42+545531.5	Epoch-2000 right ascension and declination
WDS-ID:	13239+5456	WDS designation
Discoverer Code:	ZETUMA	Discover designation and components
ADS number:	8891	Aitken Double Star catalog
HD number:	116656	HD catalog number
Hipparcos number:	65378	Hipparcos catalog number
V1:	2.1	Magnitude of the primary
V2:	12. >	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for ZETUMA

WDS 6th Orbit including measures of ZETUMA

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

Ephemeris of ZETUMA

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.755    213.4
-------------------------
2007.0     0.081    344.3
2008.0     0.064    286.6
2009.0     0.108    247.4
2010.0     0.171    233.8
2011.0     0.237    227.6
2012.0     0.303    224.1
2013.0     0.367    221.8
2014.0     0.429    220.2
2015.0     0.488    219.0
2016.0     0.544    218.1
2017.0     0.595    217.3
2018.0     0.642    216.6
2019.0     0.684    216.1
2020.0     0.719    215.6
2021.0     0.747    215.1
2022.0     0.766    214.7
2023.0     0.776    214.2
2024.0     0.773    213.8
2025.0     0.755    213.4
2026.0     0.719    212.9
2027.0     0.659    212.4
2028.0     0.567    211.7
2029.0     0.432    210.7
2030.0     0.238    208.4
2031.0     0.021     84.2
2032.0     0.255     34.5
2033.0     0.410     32.2
2034.0     0.482     31.0
2035.0     0.502     29.9
2036.0     0.491     28.9
2037.0     0.459     27.8
2038.0     0.413     26.5
2039.0     0.359     24.8
2040.0     0.299     22.5
2041.0     0.235     18.9
2042.0     0.170     12.6

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.