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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:30:42

Orbital Elements for RST2957

WDS:	RST2957	WDS ID/Discoverer
P:	55.600	Orbital period (years)
a:	0.213	Semi-major axis (arcseconds)
i:	85.4	Inclination (degrees)
Ω:	92.8	Longitude of ascending node (degrees)
T:	2027.560	Epoch of periastron passage (year)
e:	0.568	Eccentricity
ω:	342.4	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST2957

Position:	152507.67-234016.2	Epoch-2000 right ascension and declination
WDS-ID:	15251-2340	WDS designation
Discoverer Code:	RST2957	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	137153	HD catalog number
Hipparcos number:	75478	Hipparcos catalog number
V1:	9.26	Magnitude of the primary
V2:	9.47	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST2957

WDS 6th Orbit including measures of RST2957

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

Ephemeris of RST2957

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.021     67.7
-------------------------
1998.0     0.310    271.0
1999.0     0.315    271.2
2000.0     0.319    271.4
2001.0     0.322    271.6
2002.0     0.324    271.8
2003.0     0.325    271.9
2004.0     0.325    272.1
2005.0     0.324    272.3
2006.0     0.321    272.5
2007.0     0.317    272.7
2008.0     0.312    272.9
2009.0     0.306    273.1
2010.0     0.299    273.3
2011.0     0.290    273.5
2012.0     0.279    273.8
2013.0     0.268    274.0
2014.0     0.254    274.3
2015.0     0.239    274.6
2016.0     0.223    275.0
2017.0     0.204    275.4
2018.0     0.184    275.9
2019.0     0.161    276.6
2020.0     0.137    277.5
2021.0     0.110    278.7
2022.0     0.081    280.9
2023.0     0.050    285.8
2024.0     0.018    307.7
2025.0     0.021     67.7
2026.0     0.052     85.1
2027.0     0.078     89.8
2028.0     0.092     92.4
2029.0     0.093     94.6
2030.0     0.083     97.1
2031.0     0.065    100.6
2032.0     0.045    107.2
2033.0     0.023    126.0
2034.0     0.015    200.7
2035.0     0.032    244.8
2036.0     0.055    255.7
2037.0     0.077    260.3
2038.0     0.099    262.9
2039.0     0.120    264.5
2040.0     0.139    265.7
2041.0     0.158    266.6
2042.0     0.176    267.2
2043.0     0.193    267.8
2044.0     0.209    268.3
2045.0     0.224    268.7
2046.0     0.238    269.1
2047.0     0.251    269.4
2048.0     0.263    269.7
2049.0     0.273    270.0
2050.0     0.283    270.2
2051.0     0.292    270.4

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.