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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:08:16

Orbital Elements for HDS2806AB

WDS:	HDS2806AB	WDS ID/Discoverer
P:	84.400	Orbital period (years)
a:	0.475	Semi-major axis (arcseconds)
i:	140.0	Inclination (degrees)
Ω:	204.0	Longitude of ascending node (degrees)
T:	2001.550	Epoch of periastron passage (year)
e:	0.252	Eccentricity
ω:	336.2	Longitude of periastron (degrees)
Start-Year:	1983.0	Year
End-Year:	2067.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2806AB

Position:	194515.54-682322.3	Epoch-2000 right ascension and declination
WDS-ID:	19453-6823	WDS designation
Discoverer Code:	HDS2806AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	185655	HD catalog number
Hipparcos number:	97196	Hipparcos catalog number
V1:	10.34	Magnitude of the primary
V2:	12.97	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS2806AB

WDS 6th Orbit including measures of HDS2806AB

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

Ephemeris of HDS2806AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.406     98.2
-------------------------
1983.0     0.423    343.4
1984.0     0.408    339.3
1985.0     0.392    334.8
1986.0     0.377    330.0
1987.0     0.362    324.7
1988.0     0.348    319.1
1989.0     0.335    312.9
1990.0     0.324    306.4
1991.0     0.315    299.4
1992.0     0.308    292.0
1993.0     0.303    284.3
1994.0     0.301    276.5
1995.0     0.302    268.6
1996.0     0.305    260.9
1997.0     0.310    253.3
1998.0     0.316    246.0
1999.0     0.324    239.0
2000.0     0.331    232.4
2001.0     0.339    226.0
2002.0     0.346    220.0
2003.0     0.353    214.1
2004.0     0.358    208.5
2005.0     0.362    203.0
2006.0     0.365    197.6
2007.0     0.367    192.3
2008.0     0.367    187.0
2009.0     0.367    181.7
2010.0     0.366    176.4
2011.0     0.364    171.0
2012.0     0.363    165.6
2013.0     0.361    160.2
2014.0     0.360    154.7
2015.0     0.360    149.2
2016.0     0.360    143.7
2017.0     0.361    138.2
2018.0     0.363    132.7
2019.0     0.366    127.3
2020.0     0.370    122.1
2021.0     0.376    117.0
2022.0     0.382    112.0
2023.0     0.389    107.2
2024.0     0.398    102.6
2025.0     0.406     98.2
2026.0     0.416     93.9
2027.0     0.426     89.9
2028.0     0.436     86.1
2029.0     0.447     82.4
2030.0     0.458     78.9
2031.0     0.468     75.6
2032.0     0.479     72.4
2033.0     0.490     69.4
2034.0     0.500     66.5
2035.0     0.510     63.7
2036.0     0.520     61.0
2037.0     0.529     58.4
2038.0     0.537     55.9
2039.0     0.545     53.4
2040.0     0.553     51.1
2041.0     0.560     48.8
2042.0     0.566     46.5
2043.0     0.571     44.3
2044.0     0.575     42.1
2045.0     0.579     40.0
2046.0     0.582     37.9
2047.0     0.584     35.8
2048.0     0.585     33.7
2049.0     0.585     31.6
2050.0     0.585     29.5
2051.0     0.583     27.4
2052.0     0.580     25.3
2053.0     0.577     23.2
2054.0     0.572     21.0
2055.0     0.567     18.8
2056.0     0.560     16.6
2057.0     0.552     14.3
2058.0     0.544     11.9
2059.0     0.535      9.4
2060.0     0.524      6.9
2061.0     0.513      4.2
2062.0     0.501      1.5
2063.0     0.488    358.5
2064.0     0.474    355.5
2065.0     0.460    352.2
2066.0     0.445    348.7

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.