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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:40:55

Orbital Elements for A1866BC

WDS:	A1866BC	WDS ID/Discoverer
P:	56.400	Orbital period (years)
a:	0.279	Semi-major axis (arcseconds)
i:	37.4	Inclination (degrees)
Ω:	57.5	Longitude of ascending node (degrees)
T:	1991.200	Epoch of periastron passage (year)
e:	0.13	Eccentricity
ω:	69.4	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 A1866BC

Position:	164914.20+455900.4	Epoch-2000 right ascension and declination
WDS-ID:	16492+4559	WDS designation
Discoverer Code:	A1866BC	Discover designation and components
ADS number:	10227	Aitken Double Star catalog
HD number:	152107	HD catalog number
Hipparcos number:	82321	Hipparcos catalog number
V1:	9.5	Magnitude of the primary
V2:	9.6	Magnitude of the secondary
Equinox:		Equinox
Date:	2011	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1866BC

WDS 6th Orbit including measures of A1866BC

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

Ephemeris of A1866BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.247    336.9
-------------------------
1997.0     0.212    179.8
1998.0     0.221    188.2
1999.0     0.231    195.9
2000.0     0.241    202.9
2001.0     0.251    209.4
2002.0     0.260    215.4
2003.0     0.268    221.0
2004.0     0.275    226.3
2005.0     0.282    231.4
2006.0     0.286    236.2
2007.0     0.290    240.9
2008.0     0.292    245.5
2009.0     0.293    250.1
2010.0     0.293    254.7
2011.0     0.292    259.2
2012.0     0.290    263.9
2013.0     0.287    268.6
2014.0     0.283    273.4
2015.0     0.279    278.4
2016.0     0.275    283.5
2017.0     0.270    288.8
2018.0     0.265    294.2
2019.0     0.261    299.9
2020.0     0.257    305.7
2021.0     0.254    311.7
2022.0     0.251    317.9
2023.0     0.249    324.1
2024.0     0.248    330.5
2025.0     0.247    336.9
2026.0     0.248    343.3
2027.0     0.249    349.6
2028.0     0.251    355.9
2029.0     0.254      2.0
2030.0     0.256      8.0
2031.0     0.259     13.9
2032.0     0.262     19.7
2033.0     0.265     25.3
2034.0     0.266     30.9
2035.0     0.268     36.4
2036.0     0.268     41.8
2037.0     0.267     47.3
2038.0     0.265     52.8
2039.0     0.262     58.4
2040.0     0.257     64.3
2041.0     0.251     70.3
2042.0     0.244     76.7
2043.0     0.236     83.5
2044.0     0.227     90.8
2045.0     0.219     98.7
2046.0     0.210    107.2
2047.0     0.203    116.4
2048.0     0.198    126.1
2049.0     0.195    136.3
2050.0     0.194    146.7
2051.0     0.196    157.0
2052.0     0.201    166.9

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.