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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:38:46

Orbital Elements for RST3949AA,AB

WDS:	RST3949AA,AB	WDS ID/Discoverer
P:	76.461	Orbital period (years)
a:	0.76338	Semi-major axis (arcseconds)
i:	25.442	Inclination (degrees)
Ω:	139.48	Longitude of ascending node (degrees)
T:	1995.515	Epoch of periastron passage (year)
e:	0.48188	Eccentricity
ω:	128.099	Longitude of periastron (degrees)
Start-Year:	1987.0	Year
End-Year:	2063.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3949AA,AB

Position:	162748.23-082218.1	Epoch-2000 right ascension and declination
WDS-ID:	16278-0822	WDS designation
Discoverer Code:	RST3949AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	148367	HD catalog number
Hipparcos number:	80628	Hipparcos catalog number
V1:	4.71	Magnitude of the primary
V2:	8.83	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for RST3949AA,AB

WDS 6th Orbit including measures of RST3949AA,AB

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

Ephemeris of RST3949AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.997     72.8
-------------------------
1987.0     0.591    170.5
1988.0     0.551    177.2
1989.0     0.511    184.9
1990.0     0.473    193.9
1991.0     0.436    204.4
1992.0     0.405    216.7
1993.0     0.382    230.8
1994.0     0.369    246.2
1995.0     0.368    262.3
1996.0     0.378    277.9
1997.0     0.396    292.5
1998.0     0.420    305.5
1999.0     0.446    317.1
2000.0     0.473    327.4
2001.0     0.501    336.6
2002.0     0.528    344.8
2003.0     0.555    352.2
2004.0     0.582    358.9
2005.0     0.608      5.1
2006.0     0.633     10.7
2007.0     0.658     15.9
2008.0     0.683     20.7
2009.0     0.707     25.2
2010.0     0.730     29.4
2011.0     0.753     33.4
2012.0     0.775     37.1
2013.0     0.797     40.6
2014.0     0.817     44.0
2015.0     0.837     47.1
2016.0     0.857     50.1
2017.0     0.876     53.0
2018.0     0.894     55.8
2019.0     0.911     58.5
2020.0     0.927     61.1
2021.0     0.943     63.5
2022.0     0.957     65.9
2023.0     0.971     68.3
2024.0     0.984     70.5
2025.0     0.997     72.8
2026.0     1.008     74.9
2027.0     1.019     77.0
2028.0     1.028     79.1
2029.0     1.037     81.1
2030.0     1.044     83.1
2031.0     1.051     85.1
2032.0     1.057     87.1
2033.0     1.062     89.0
2034.0     1.065     90.9
2035.0     1.068     92.8
2036.0     1.070     94.7
2037.0     1.071     96.6
2038.0     1.070     98.5
2039.0     1.069    100.4
2040.0     1.066    102.3
2041.0     1.062    104.3
2042.0     1.057    106.2
2043.0     1.051    108.1
2044.0     1.043    110.1
2045.0     1.034    112.1
2046.0     1.024    114.2
2047.0     1.013    116.3
2048.0     1.000    118.4
2049.0     0.986    120.6
2050.0     0.970    122.9
2051.0     0.953    125.2
2052.0     0.934    127.7
2053.0     0.913    130.2
2054.0     0.891    132.9
2055.0     0.867    135.7
2056.0     0.841    138.7
2057.0     0.814    141.8
2058.0     0.784    145.2
2059.0     0.753    148.9
2060.0     0.719    152.9
2061.0     0.684    157.3
2062.0     0.648    162.2

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.