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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:33:35

Orbital Elements for BU619A

WDS:	BU619A	WDS ID/Discoverer
P:	75.200	Orbital period (years)
a:	0.132	Semi-major axis (arcseconds)
i:	76.5	Inclination (degrees)
Ω:	29.7	Longitude of ascending node (degrees)
T:	1993.460	Epoch of periastron passage (year)
e:	0.938	Eccentricity
ω:	258.3	Longitude of periastron (degrees)
Start-Year:	1988.0	Year
End-Year:	2062.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU619A

Position:	154310.53+134003.7	Epoch-2000 right ascension and declination
WDS-ID:	15432+1340	WDS designation
Discoverer Code:	BU619A	Discover designation and components
ADS number:	9758	Aitken Double Star catalog
HD number:	140438	HD catalog number
Hipparcos number:	76985	Hipparcos catalog number
V1:	6.95	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for BU619A

WDS 6th Orbit including measures of BU619A

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

Ephemeris of BU619A

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.085     72.0
-------------------------
1988.0     0.034    164.0
1989.0     0.033    169.9
1990.0     0.032    176.2
1991.0     0.030    183.1
1992.0     0.027    191.3
1993.0     0.018    204.2
1994.0     0.022     30.8
1995.0     0.039     38.2
1996.0     0.050     41.6
1997.0     0.057     44.0
1998.0     0.063     45.9
1999.0     0.067     47.5
2000.0     0.071     48.9
2001.0     0.075     50.2
2002.0     0.077     51.3
2003.0     0.080     52.4
2004.0     0.082     53.5
2005.0     0.083     54.5
2006.0     0.085     55.4
2007.0     0.086     56.3
2008.0     0.087     57.2
2009.0     0.088     58.1
2010.0     0.089     59.0
2011.0     0.089     59.8
2012.0     0.089     60.7
2013.0     0.090     61.5
2014.0     0.090     62.4
2015.0     0.090     63.2
2016.0     0.090     64.0
2017.0     0.089     64.9
2018.0     0.089     65.7
2019.0     0.089     66.6
2020.0     0.088     67.5
2021.0     0.088     68.3
2022.0     0.087     69.2
2023.0     0.086     70.1
2024.0     0.085     71.0
2025.0     0.085     72.0
2026.0     0.084     72.9
2027.0     0.083     73.9
2028.0     0.082     74.9
2029.0     0.081     75.9
2030.0     0.079     77.0
2031.0     0.078     78.1
2032.0     0.077     79.2
2033.0     0.076     80.3
2034.0     0.074     81.5
2035.0     0.073     82.8
2036.0     0.072     84.1
2037.0     0.070     85.4
2038.0     0.069     86.8
2039.0     0.067     88.3
2040.0     0.066     89.8
2041.0     0.064     91.4
2042.0     0.063     93.1
2043.0     0.061     94.8
2044.0     0.060     96.7
2045.0     0.058     98.6
2046.0     0.056    100.7
2047.0     0.055    102.9
2048.0     0.053    105.2
2049.0     0.052    107.6
2050.0     0.050    110.2
2051.0     0.049    113.0
2052.0     0.047    115.9
2053.0     0.046    119.1
2054.0     0.044    122.4
2055.0     0.043    125.9
2056.0     0.042    129.7
2057.0     0.040    133.7
2058.0     0.039    137.9
2059.0     0.038    142.4
2060.0     0.037    147.2
2061.0     0.036    152.1

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.