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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:14:58

Orbital Elements for BU798AB

WDS:	BU798AB	WDS ID/Discoverer
P:	60.200	Orbital period (years)
a:	0.352	Semi-major axis (arcseconds)
i:	84.8	Inclination (degrees)
Ω:	170.9	Longitude of ascending node (degrees)
T:	1980.300	Epoch of periastron passage (year)
e:	0.431	Eccentricity
ω:	209.6	Longitude of periastron (degrees)
Start-Year:	1995.0	Year
End-Year:	2055.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU798AB

Position:	130402.74-173729.9	Epoch-2000 right ascension and declination
WDS-ID:	13040-1738	WDS designation
Discoverer Code:	BU798AB	Discover designation and components
ADS number:	8764	Aitken Double Star catalog
HD number:	113460	HD catalog number
Hipparcos number:	63754	Hipparcos catalog number
V1:	9.16	Magnitude of the primary
V2:	9.67	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU798AB

WDS 6th Orbit including measures of BU798AB

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

Ephemeris of BU798AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.125    187.7
-------------------------
1995.0     0.388    169.3
1996.0     0.407    169.7
1997.0     0.424    170.0
1998.0     0.438    170.3
1999.0     0.450    170.6
2000.0     0.460    170.9
2001.0     0.467    171.2
2002.0     0.472    171.5
2003.0     0.475    171.8
2004.0     0.476    172.0
2005.0     0.475    172.3
2006.0     0.472    172.6
2007.0     0.467    172.8
2008.0     0.461    173.1
2009.0     0.453    173.4
2010.0     0.443    173.7
2011.0     0.431    174.0
2012.0     0.418    174.4
2013.0     0.404    174.7
2014.0     0.388    175.1
2015.0     0.370    175.5
2016.0     0.351    176.0
2017.0     0.331    176.5
2018.0     0.309    177.1
2019.0     0.286    177.8
2020.0     0.261    178.6
2021.0     0.236    179.6
2022.0     0.210    180.8
2023.0     0.182    182.4
2024.0     0.154    184.6
2025.0     0.125    187.7
2026.0     0.096    192.8
2027.0     0.067    202.3
2028.0     0.043    223.9
2029.0     0.033    272.0
2030.0     0.049    311.9
2031.0     0.076    328.3
2032.0     0.104    336.0
2033.0     0.132    340.4
2034.0     0.157    343.3
2035.0     0.180    345.5
2036.0     0.197    347.2
2037.0     0.209    348.6
2038.0     0.212    350.0
2039.0     0.205    351.4
2040.0     0.187    352.9
2041.0     0.159    354.9
2042.0     0.122    358.0
2043.0     0.078      4.4
2044.0     0.035     27.1
2045.0     0.031    125.0
2046.0     0.073    152.9
2047.0     0.119    159.9
2048.0     0.162    163.0
2049.0     0.203    164.8
2050.0     0.241    166.1
2051.0     0.276    167.0
2052.0     0.307    167.7
2053.0     0.336    168.3
2054.0     0.361    168.8

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.