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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:15:27

Orbital Elements for RST2151

WDS:	RST2151	WDS ID/Discoverer
P:	83.800	Orbital period (years)
a:	0.192	Semi-major axis (arcseconds)
i:	123.6	Inclination (degrees)
Ω:	39.5	Longitude of ascending node (degrees)
T:	1985.900	Epoch of periastron passage (year)
e:	0.186	Eccentricity
ω:	168.7	Longitude of periastron (degrees)
Start-Year:	1984.0	Year
End-Year:	2066.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST2151

Position:	204001.23-294029.1	Epoch-2000 right ascension and declination
WDS-ID:	20400-2940	WDS designation
Discoverer Code:	RST2151	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	196698	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	10.6	Magnitude of the primary
V2:	10.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST2151

WDS 6th Orbit including measures of RST2151

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

Ephemeris of RST2151

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.218     50.7
-------------------------
1984.0     0.148    233.0
1985.0     0.152    229.1
1986.0     0.154    225.4
1987.0     0.156    221.9
1988.0     0.157    218.4
1989.0     0.157    214.9
1990.0     0.155    211.3
1991.0     0.153    207.7
1992.0     0.150    204.0
1993.0     0.146    200.0
1994.0     0.142    195.9
1995.0     0.137    191.4
1996.0     0.132    186.6
1997.0     0.126    181.5
1998.0     0.121    175.8
1999.0     0.117    169.7
2000.0     0.112    163.2
2001.0     0.109    156.1
2002.0     0.107    148.7
2003.0     0.106    141.1
2004.0     0.106    133.4
2005.0     0.107    125.8
2006.0     0.110    118.5
2007.0     0.114    111.6
2008.0     0.119    105.2
2009.0     0.124     99.4
2010.0     0.130     94.0
2011.0     0.137     89.2
2012.0     0.144     84.8
2013.0     0.151     80.8
2014.0     0.158     77.2
2015.0     0.165     73.9
2016.0     0.172     70.9
2017.0     0.178     68.1
2018.0     0.185     65.4
2019.0     0.191     63.0
2020.0     0.196     60.7
2021.0     0.202     58.5
2022.0     0.206     56.4
2023.0     0.211     54.5
2024.0     0.215     52.6
2025.0     0.218     50.7
2026.0     0.221     48.9
2027.0     0.223     47.2
2028.0     0.225     45.5
2029.0     0.226     43.8
2030.0     0.227     42.1
2031.0     0.227     40.4
2032.0     0.226     38.8
2033.0     0.225     37.1
2034.0     0.224     35.4
2035.0     0.221     33.6
2036.0     0.219     31.8
2037.0     0.215     30.0
2038.0     0.211     28.1
2039.0     0.207     26.1
2040.0     0.202     24.1
2041.0     0.196     21.9
2042.0     0.190     19.6
2043.0     0.184     17.1
2044.0     0.177     14.5
2045.0     0.170     11.6
2046.0     0.162      8.5
2047.0     0.154      5.1
2048.0     0.147      1.3
2049.0     0.139    357.0
2050.0     0.131    352.3
2051.0     0.124    347.0
2052.0     0.117    341.0
2053.0     0.111    334.3
2054.0     0.105    326.9
2055.0     0.102    318.9
2056.0     0.099    310.3
2057.0     0.098    301.4
2058.0     0.099    292.6
2059.0     0.102    284.0
2060.0     0.105    275.9
2061.0     0.110    268.5
2062.0     0.116    261.7
2063.0     0.122    255.6
2064.0     0.128    250.1
2065.0     0.134    245.1

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.