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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:10:44

Orbital Elements for B459BC

WDS:	B459BC	WDS ID/Discoverer
P:	72.780	Orbital period (years)
a:	0.292	Semi-major axis (arcseconds)
i:	44.9	Inclination (degrees)
Ω:	64.6	Longitude of ascending node (degrees)
T:	2044.560	Epoch of periastron passage (year)
e:	0.229	Eccentricity
ω:	278.7	Longitude of periastron (degrees)
Start-Year:	1989.0	Year
End-Year:	2061.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B459BC

Position:	200014.72-552225.0	Epoch-2000 right ascension and declination
WDS-ID:	20002-5522	WDS designation
Discoverer Code:	B459BC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	188908	HD catalog number
Hipparcos number:	98457	Hipparcos catalog number
V1:	10.98	Magnitude of the primary
V2:	11.07	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for B459BC

WDS 6th Orbit including measures of B459BC

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

Ephemeris of B459BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.302    228.2
-------------------------
1989.0     0.282     86.6
1990.0     0.282     90.3
1991.0     0.280     94.0
1992.0     0.279     97.7
1993.0     0.276    101.5
1994.0     0.274    105.3
1995.0     0.271    109.2
1996.0     0.268    113.2
1997.0     0.265    117.3
1998.0     0.263    121.5
1999.0     0.260    125.8
2000.0     0.258    130.1
2001.0     0.256    134.5
2002.0     0.254    139.0
2003.0     0.253    143.5
2004.0     0.253    148.0
2005.0     0.253    152.6
2006.0     0.254    157.1
2007.0     0.255    161.6
2008.0     0.257    166.0
2009.0     0.259    170.4
2010.0     0.262    174.7
2011.0     0.265    178.9
2012.0     0.268    183.0
2013.0     0.272    187.0
2014.0     0.275    190.9
2015.0     0.279    194.7
2016.0     0.283    198.3
2017.0     0.287    201.9
2018.0     0.290    205.4
2019.0     0.294    208.8
2020.0     0.296    212.2
2021.0     0.299    215.5
2022.0     0.301    218.7
2023.0     0.302    221.9
2024.0     0.303    225.1
2025.0     0.302    228.2
2026.0     0.301    231.4
2027.0     0.299    234.7
2028.0     0.296    238.0
2029.0     0.292    241.3
2030.0     0.286    244.8
2031.0     0.280    248.4
2032.0     0.272    252.2
2033.0     0.263    256.3
2034.0     0.253    260.7
2035.0     0.242    265.4
2036.0     0.231    270.6
2037.0     0.218    276.4
2038.0     0.206    282.9
2039.0     0.193    290.2
2040.0     0.182    298.5
2041.0     0.172    307.8
2042.0     0.165    318.1
2043.0     0.161    329.1
2044.0     0.160    340.5
2045.0     0.163    351.7
2046.0     0.169      2.2
2047.0     0.178     11.9
2048.0     0.189     20.5
2049.0     0.201     28.2
2050.0     0.212     35.0
2051.0     0.224     41.1
2052.0     0.235     46.6
2053.0     0.245     51.7
2054.0     0.254     56.4
2055.0     0.261     60.7
2056.0     0.268     64.9
2057.0     0.273     68.9
2058.0     0.277     72.7
2059.0     0.280     76.5
2060.0     0.282     80.1

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.