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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:18:27

Orbital Elements for HDS2995

WDS:	HDS2995	WDS ID/Discoverer
P:	69.570	Orbital period (years)
a:	0.396	Semi-major axis (arcseconds)
i:	127.4	Inclination (degrees)
Ω:	132.2	Longitude of ascending node (degrees)
T:	2007.790	Epoch of periastron passage (year)
e:	0.628	Eccentricity
ω:	337.7	Longitude of periastron (degrees)
Start-Year:	1991.0	Year
End-Year:	2059.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2995

Position:	210126.09+403704.6	Epoch-2000 right ascension and declination
WDS-ID:	21014+4037	WDS designation
Discoverer Code:	HDS2995	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	200325	HD catalog number
Hipparcos number:	103749	Hipparcos catalog number
V1:	7.31	Magnitude of the primary
V2:	10.68	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2995

WDS 6th Orbit including measures of HDS2995

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

Ephemeris of HDS2995

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.402    351.1
-------------------------
1991.0     0.510    306.4
1992.0     0.492    304.9
1993.0     0.473    303.3
1994.0     0.451    301.5
1995.0     0.428    299.5
1996.0     0.403    297.2
1997.0     0.376    294.7
1998.0     0.347    291.8
1999.0     0.316    288.3
2000.0     0.282    284.0
2001.0     0.247    278.5
2002.0     0.211    271.1
2003.0     0.174    260.7
2004.0     0.141    244.9
2005.0     0.117    221.2
2006.0     0.112    191.0
2007.0     0.126    163.3
2008.0     0.144    142.2
2009.0     0.156    125.2
2010.0     0.159    109.9
2011.0     0.160     94.8
2012.0     0.162     79.9
2013.0     0.167     65.7
2014.0     0.178     52.7
2015.0     0.192     41.5
2016.0     0.210     32.0
2017.0     0.230     24.0
2018.0     0.252     17.4
2019.0     0.274     11.8
2020.0     0.296      7.1
2021.0     0.318      3.1
2022.0     0.340    359.5
2023.0     0.362    356.4
2024.0     0.382    353.6
2025.0     0.402    351.1
2026.0     0.422    348.9
2027.0     0.440    346.8
2028.0     0.458    344.9
2029.0     0.475    343.1
2030.0     0.491    341.5
2031.0     0.506    340.0
2032.0     0.520    338.5
2033.0     0.534    337.1
2034.0     0.546    335.8
2035.0     0.557    334.5
2036.0     0.568    333.3
2037.0     0.578    332.2
2038.0     0.587    331.0
2039.0     0.594    329.9
2040.0     0.601    328.9
2041.0     0.607    327.8
2042.0     0.612    326.8
2043.0     0.616    325.8
2044.0     0.619    324.8
2045.0     0.621    323.8
2046.0     0.623    322.8
2047.0     0.623    321.8
2048.0     0.622    320.8
2049.0     0.620    319.8
2050.0     0.617    318.8
2051.0     0.612    317.8
2052.0     0.607    316.7
2053.0     0.601    315.7
2054.0     0.593    314.6
2055.0     0.584    313.5
2056.0     0.574    312.4
2057.0     0.562    311.2
2058.0     0.550    309.9

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.