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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:36:25

Orbital Elements for BU949

WDS:	BU949	WDS ID/Discoverer
P:	56.330	Orbital period (years)
a:	0.289	Semi-major axis (arcseconds)
i:	82.3	Inclination (degrees)
Ω:	198.1	Longitude of ascending node (degrees)
T:	2018.340	Epoch of periastron passage (year)
e:	0.774	Eccentricity
ω:	157.8	Longitude of periastron (degrees)
Start-Year:	1997.0	Year
End-Year:	2053.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU949

Position:	160827.25-100608.4	Epoch-2000 right ascension and declination
WDS-ID:	16085-1006	WDS designation
Discoverer Code:	BU949	Discover designation and components
ADS number:	9932	Aitken Double Star catalog
HD number:	144892	HD catalog number
Hipparcos number:	79071	Hipparcos catalog number
V1:	7.08	Magnitude of the primary
V2:	8.19	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU949

WDS 6th Orbit including measures of BU949

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

Ephemeris of BU949

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.128    183.0
-------------------------
1997.0     0.479    196.3
1998.0     0.475    196.5
1999.0     0.470    196.7
2000.0     0.464    196.9
2001.0     0.456    197.1
2002.0     0.446    197.3
2003.0     0.436    197.6
2004.0     0.423    197.8
2005.0     0.410    198.1
2006.0     0.394    198.4
2007.0     0.376    198.7
2008.0     0.356    199.0
2009.0     0.334    199.4
2010.0     0.310    199.8
2011.0     0.282    200.3
2012.0     0.251    201.0
2013.0     0.217    201.8
2014.0     0.177    203.0
2015.0     0.132    204.9
2016.0     0.080    209.1
2017.0     0.022    235.1
2018.0     0.046      9.5
2019.0     0.069     21.7
2020.0     0.049     34.4
2021.0     0.024     76.5
2022.0     0.034    151.5
2023.0     0.065    172.2
2024.0     0.097    179.4
2025.0     0.128    183.0
2026.0     0.157    185.3
2027.0     0.185    186.9
2028.0     0.211    188.0
2029.0     0.236    188.9
2030.0     0.259    189.7
2031.0     0.281    190.3
2032.0     0.302    190.8
2033.0     0.322    191.3
2034.0     0.340    191.7
2035.0     0.357    192.1
2036.0     0.373    192.4
2037.0     0.388    192.7
2038.0     0.401    193.0
2039.0     0.414    193.3
2040.0     0.426    193.5
2041.0     0.436    193.8
2042.0     0.446    194.0
2043.0     0.454    194.2
2044.0     0.461    194.5
2045.0     0.468    194.7
2046.0     0.473    194.9
2047.0     0.477    195.1
2048.0     0.481    195.3
2049.0     0.483    195.5
2050.0     0.484    195.7
2051.0     0.484    195.8
2052.0     0.483    196.0

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.