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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:50:38

Orbital Elements for RST70

WDS:	RST70	WDS ID/Discoverer
P:	51.100	Orbital period (years)
a:	0.176	Semi-major axis (arcseconds)
i:	52.8	Inclination (degrees)
Ω:	44.7	Longitude of ascending node (degrees)
T:	2017.330	Epoch of periastron passage (year)
e:	0.74	Eccentricity
ω:	67.8	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 RST70

Position:	031917.58-505231.1	Epoch-2000 right ascension and declination
WDS-ID:	03193-5053	WDS designation
Discoverer Code:	RST70	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	20841	HD catalog number
Hipparcos number:	15451	Hipparcos catalog number
V1:	9.00	Magnitude of the primary
V2:	9.15	Magnitude of the secondary
Equinox:		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 RST70

WDS 6th Orbit including measures of RST70

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

Ephemeris of RST70

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.175    243.6
-------------------------
2000.0     0.175    300.5
2001.0     0.170    303.5
2002.0     0.165    306.7
2003.0     0.160    310.1
2004.0     0.154    313.7
2005.0     0.149    317.5
2006.0     0.143    321.7
2007.0     0.138    326.2
2008.0     0.132    331.0
2009.0     0.126    336.4
2010.0     0.120    342.2
2011.0     0.114    348.7
2012.0     0.108    355.9
2013.0     0.101      4.1
2014.0     0.092     13.6
2015.0     0.081     25.4
2016.0     0.065     41.9
2017.0     0.039     76.0
2018.0     0.035    167.1
2019.0     0.067    205.9
2020.0     0.096    219.5
2021.0     0.119    227.3
2022.0     0.137    232.7
2023.0     0.152    237.0
2024.0     0.164    240.5
2025.0     0.175    243.6
2026.0     0.184    246.4
2027.0     0.191    248.9
2028.0     0.197    251.3
2029.0     0.202    253.5
2030.0     0.207    255.6
2031.0     0.210    257.6
2032.0     0.213    259.6
2033.0     0.215    261.6
2034.0     0.216    263.5
2035.0     0.217    265.4
2036.0     0.217    267.3
2037.0     0.217    269.2
2038.0     0.216    271.1
2039.0     0.215    273.0
2040.0     0.213    274.9
2041.0     0.211    276.9
2042.0     0.209    278.9
2043.0     0.206    280.9
2044.0     0.204    283.0
2045.0     0.200    285.2
2046.0     0.197    287.5
2047.0     0.193    289.8
2048.0     0.189    292.2
2049.0     0.185    294.8

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.