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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:22:17

Orbital Elements for B1008AB

WDS:	B1008AB	WDS ID/Discoverer
P:	74.200	Orbital period (years)
a:	0.228	Semi-major axis (arcseconds)
i:	101.6	Inclination (degrees)
Ω:	32.1	Longitude of ascending node (degrees)
T:	2020.430	Epoch of periastron passage (year)
e:	0.58	Eccentricity
ω:	162.1	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 B1008AB

Position:	213057.70-363249.7	Epoch-2000 right ascension and declination
WDS-ID:	21310-3633	WDS designation
Discoverer Code:	B1008AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	204635	HD catalog number
Hipparcos number:	106224	Hipparcos catalog number
V1:	8.87	Magnitude of the primary
V2:	8.06	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for B1008AB

WDS 6th Orbit including measures of B1008AB

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

Ephemeris of B1008AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.070    192.0
-------------------------
1988.0     0.350     34.2
1989.0     0.350     33.9
1990.0     0.349     33.5
1991.0     0.347     33.2
1992.0     0.345     32.9
1993.0     0.342     32.5
1994.0     0.338     32.2
1995.0     0.334     31.8
1996.0     0.329     31.4
1997.0     0.323     31.0
1998.0     0.316     30.6
1999.0     0.308     30.2
2000.0     0.300     29.7
2001.0     0.290     29.3
2002.0     0.280     28.8
2003.0     0.269     28.2
2004.0     0.257     27.6
2005.0     0.244     27.0
2006.0     0.230     26.2
2007.0     0.214     25.4
2008.0     0.198     24.4
2009.0     0.180     23.3
2010.0     0.161     21.8
2011.0     0.141     20.0
2012.0     0.119     17.6
2013.0     0.097     14.0
2014.0     0.073      8.1
2015.0     0.049    356.6
2016.0     0.030    327.4
2017.0     0.029    270.1
2018.0     0.047    237.9
2019.0     0.068    225.0
2020.0     0.086    218.1
2021.0     0.096    213.1
2022.0     0.098    208.8
2023.0     0.093    204.4
2024.0     0.083    199.1
2025.0     0.070    192.0
2026.0     0.056    181.5
2027.0     0.044    164.4
2028.0     0.037    138.1
2029.0     0.039    108.5
2030.0     0.049     86.8
2031.0     0.064     73.6
2032.0     0.079     65.4
2033.0     0.096     59.9
2034.0     0.112     56.1
2035.0     0.128     53.2
2036.0     0.143     50.9
2037.0     0.159     49.1
2038.0     0.173     47.6
2039.0     0.187     46.3
2040.0     0.201     45.2
2041.0     0.214     44.3
2042.0     0.226     43.4
2043.0     0.238     42.7
2044.0     0.249     42.0
2045.0     0.260     41.3
2046.0     0.270     40.7
2047.0     0.280     40.2
2048.0     0.288     39.7
2049.0     0.297     39.2
2050.0     0.304     38.7
2051.0     0.312     38.3
2052.0     0.318     37.9
2053.0     0.324     37.5
2054.0     0.329     37.1
2055.0     0.334     36.7
2056.0     0.338     36.4
2057.0     0.342     36.0
2058.0     0.345     35.7
2059.0     0.347     35.3
2060.0     0.349     35.0
2061.0     0.350     34.6

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.