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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:17:50

Orbital Elements for RST4739

WDS:	RST4739	WDS ID/Discoverer
P:	38.230	Orbital period (years)
a:	0.226	Semi-major axis (arcseconds)
i:	155.6	Inclination (degrees)
Ω:	50.1	Longitude of ascending node (degrees)
T:	2027.970	Epoch of periastron passage (year)
e:	0.551	Eccentricity
ω:	275.8	Longitude of periastron (degrees)
Start-Year:	2006.0	Year
End-Year:	2044.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST4739

Position:	001205.19-583129.3	Epoch-2000 right ascension and declination
WDS-ID:	00121-5832	WDS designation
Discoverer Code:	RST4739	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	791	HD catalog number
Hipparcos number:	975	Hipparcos catalog number
V1:	8.44	Magnitude of the primary
V2:	8.61	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST4739

WDS 6th Orbit including measures of RST4739

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

Ephemeris of RST4739

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.151    221.1
-------------------------
2006.0     0.314    324.1
2007.0     0.317    320.4
2008.0     0.319    316.8
2009.0     0.320    313.2
2010.0     0.319    309.6
2011.0     0.318    306.0
2012.0     0.315    302.4
2013.0     0.312    298.7
2014.0     0.307    294.9
2015.0     0.301    290.9
2016.0     0.294    286.8
2017.0     0.285    282.4
2018.0     0.275    277.8
2019.0     0.263    272.7
2020.0     0.250    267.2
2021.0     0.235    261.0
2022.0     0.218    253.8
2023.0     0.198    245.3
2024.0     0.176    234.9
2025.0     0.151    221.1
2026.0     0.125    201.8
2027.0     0.102    172.7
2028.0     0.093    132.5
2029.0     0.105     93.6
2030.0     0.128     66.2
2031.0     0.153     47.5
2032.0     0.176     34.0
2033.0     0.197     23.4
2034.0     0.215     14.8
2035.0     0.232      7.5
2036.0     0.246      1.1
2037.0     0.259    355.4
2038.0     0.271    350.2
2039.0     0.281    345.4
2040.0     0.290    340.9
2041.0     0.297    336.6
2042.0     0.304    332.6
2043.0     0.309    328.7

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.