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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:16:39

Orbital Elements for B997

WDS:	B997	WDS ID/Discoverer
P:	63.670	Orbital period (years)
a:	0.207	Semi-major axis (arcseconds)
i:	41.5	Inclination (degrees)
Ω:	281.1	Longitude of ascending node (degrees)
T:	2014.340	Epoch of periastron passage (year)
e:	0.179	Eccentricity
ω:	306.4	Longitude of periastron (degrees)
Start-Year:	1994.0	Year
End-Year:	2056.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B997

Position:	205041.84-311545.4	Epoch-2000 right ascension and declination
WDS-ID:	20507-3116	WDS designation
Discoverer Code:	B997	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	198340	HD catalog number
Hipparcos number:	102892	Hipparcos catalog number
V1:	8.66	Magnitude of the primary
V2:	10.10	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for B997

WDS 6th Orbit including measures of B997

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

Ephemeris of B997

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.186    301.4
-------------------------
1994.0     0.227     97.1
1995.0     0.225    100.6
1996.0     0.221    104.2
1997.0     0.217    107.9
1998.0     0.212    111.8
1999.0     0.206    115.8
2000.0     0.200    120.2
2001.0     0.192    124.8
2002.0     0.184    129.8
2003.0     0.176    135.3
2004.0     0.168    141.4
2005.0     0.159    148.1
2006.0     0.151    155.5
2007.0     0.144    163.7
2008.0     0.138    172.8
2009.0     0.133    182.5
2010.0     0.131    192.8
2011.0     0.131    203.2
2012.0     0.133    213.6
2013.0     0.136    223.4
2014.0     0.142    232.7
2015.0     0.148    241.2
2016.0     0.154    249.0
2017.0     0.161    256.2
2018.0     0.167    262.8
2019.0     0.173    269.0
2020.0     0.177    274.8
2021.0     0.181    280.4
2022.0     0.183    285.8
2023.0     0.185    291.1
2024.0     0.186    296.2
2025.0     0.186    301.4
2026.0     0.185    306.6
2027.0     0.184    311.9
2028.0     0.182    317.2
2029.0     0.180    322.6
2030.0     0.178    328.2
2031.0     0.177    333.8
2032.0     0.175    339.6
2033.0     0.174    345.5
2034.0     0.173    351.4
2035.0     0.173    357.3
2036.0     0.174      3.3
2037.0     0.175      9.2
2038.0     0.177     15.0
2039.0     0.179     20.6
2040.0     0.182     26.1
2041.0     0.185     31.4
2042.0     0.189     36.5
2043.0     0.193     41.4
2044.0     0.197     46.1
2045.0     0.201     50.6
2046.0     0.206     54.9
2047.0     0.210     59.0
2048.0     0.214     63.0
2049.0     0.218     66.9
2050.0     0.221     70.6
2051.0     0.224     74.2
2052.0     0.226     77.7
2053.0     0.228     81.2
2054.0     0.229     84.6
2055.0     0.230     88.0

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.