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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:15:49

Orbital Elements for HDS2951

WDS:	HDS2951	WDS ID/Discoverer
P:	81.700	Orbital period (years)
a:	0.107	Semi-major axis (arcseconds)
i:	46.9	Inclination (degrees)
Ω:	107.3	Longitude of ascending node (degrees)
T:	2019.010	Epoch of periastron passage (year)
e:	0.857	Eccentricity
ω:	121.2	Longitude of periastron (degrees)
Start-Year:	1985.0	Year
End-Year:	2065.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2951

Position:	204413.92-775916.4	Epoch-2000 right ascension and declination
WDS-ID:	20442-7759	WDS designation
Discoverer Code:	HDS2951	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	196267	HD catalog number
Hipparcos number:	102348	Hipparcos catalog number
V1:	10.52	Magnitude of the primary
V2:	11.56	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2951

WDS 6th Orbit including measures of HDS2951

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

Ephemeris of HDS2951

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.056      3.4
-------------------------
1985.0     0.157     63.8
1986.0     0.157     64.5
1987.0     0.157     65.3
1988.0     0.156     66.0
1989.0     0.155     66.7
1990.0     0.155     67.4
1991.0     0.154     68.2
1992.0     0.153     69.0
1993.0     0.152     69.7
1994.0     0.150     70.5
1995.0     0.149     71.3
1996.0     0.147     72.1
1997.0     0.145     72.9
1998.0     0.143     73.8
1999.0     0.141     74.7
2000.0     0.138     75.6
2001.0     0.136     76.5
2002.0     0.133     77.5
2003.0     0.130     78.5
2004.0     0.126     79.6
2005.0     0.123     80.8
2006.0     0.119     82.0
2007.0     0.114     83.3
2008.0     0.110     84.7
2009.0     0.105     86.3
2010.0     0.099     88.0
2011.0     0.093     89.9
2012.0     0.086     92.1
2013.0     0.079     94.7
2014.0     0.071     97.9
2015.0     0.061    102.0
2016.0     0.050    107.7
2017.0     0.037    117.0
2018.0     0.021    138.8
2019.0     0.012    237.6
2020.0     0.023    301.0
2021.0     0.032    324.5
2022.0     0.038    339.0
2023.0     0.045    349.3
2024.0     0.051    357.1
2025.0     0.056      3.4
2026.0     0.062      8.5
2027.0     0.067     12.9
2028.0     0.072     16.6
2029.0     0.076     19.8
2030.0     0.081     22.7
2031.0     0.086     25.2
2032.0     0.090     27.6
2033.0     0.094     29.7
2034.0     0.098     31.6
2035.0     0.102     33.4
2036.0     0.105     35.0
2037.0     0.109     36.6
2038.0     0.112     38.0
2039.0     0.115     39.4
2040.0     0.119     40.7
2041.0     0.122     41.9
2042.0     0.124     43.1
2043.0     0.127     44.2
2044.0     0.130     45.3
2045.0     0.132     46.4
2046.0     0.135     47.4
2047.0     0.137     48.3
2048.0     0.139     49.3
2049.0     0.141     50.2
2050.0     0.143     51.0
2051.0     0.145     51.9
2052.0     0.146     52.7
2053.0     0.148     53.6
2054.0     0.149     54.4
2055.0     0.150     55.2
2056.0     0.152     55.9
2057.0     0.153     56.7
2058.0     0.154     57.5
2059.0     0.155     58.2
2060.0     0.155     59.0
2061.0     0.156     59.7
2062.0     0.156     60.4
2063.0     0.157     61.1
2064.0     0.157     61.9

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.