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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:38:53

Orbital Elements for RST3950

WDS:	RST3950	WDS ID/Discoverer
P:	26.550	Orbital period (years)
a:	0.176	Semi-major axis (arcseconds)
i:	148.3	Inclination (degrees)
Ω:	137.8	Longitude of ascending node (degrees)
T:	2000.920	Epoch of periastron passage (year)
e:	0.858	Eccentricity
ω:	259.8	Longitude of periastron (degrees)
Start-Year:	2012.0	Year
End-Year:	2038.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3950

Position:	162816.06-161243.6	Epoch-2000 right ascension and declination
WDS-ID:	16283-1613	WDS designation
Discoverer Code:	RST3950	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	148394	HD catalog number
Hipparcos number:	80677	Hipparcos catalog number
V1:	7.60	Magnitude of the primary
V2:	8.78	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2005	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for RST3950

WDS 6th Orbit including measures of RST3950

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

Ephemeris of RST3950

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.137     19.1
-------------------------
2012.0     0.276     64.9
2013.0     0.279     62.5
2014.0     0.280     60.2
2015.0     0.279     57.8
2016.0     0.275     55.5
2017.0     0.270     53.0
2018.0     0.263     50.4
2019.0     0.253     47.7
2020.0     0.242     44.7
2021.0     0.227     41.3
2022.0     0.210     37.5
2023.0     0.190     32.9
2024.0     0.166     27.1
2025.0     0.137     19.1
2026.0     0.100      5.9
2027.0     0.050    330.7
2028.0     0.054    138.3
2029.0     0.108    108.6
2030.0     0.147     97.3
2031.0     0.176     90.2
2032.0     0.200     85.0
2033.0     0.220     80.8
2034.0     0.236     77.3
2035.0     0.249     74.2
2036.0     0.260     71.4
2037.0     0.268     68.7

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.