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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:24:26

Orbital Elements for BU1099AB

WDS:	BU1099AB	WDS ID/Discoverer
P:	84.100	Orbital period (years)
a:	0.237	Semi-major axis (arcseconds)
i:	53.6	Inclination (degrees)
Ω:	171.5	Longitude of ascending node (degrees)
T:	1953.590	Epoch of periastron passage (year)
e:	0.225	Eccentricity
ω:	343.5	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 BU1099AB

Position:	005646.94+602146.3	Epoch-2000 right ascension and declination
WDS-ID:	00568+6022	WDS designation
Discoverer Code:	BU1099AB	Discover designation and components
ADS number:	784	Aitken Double Star catalog
HD number:	5408	HD catalog number
Hipparcos number:	4440	Hipparcos catalog number
V1:	6.11	Magnitude of the primary
V2:	6.53	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1099AB

WDS 6th Orbit including measures of BU1099AB

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

Ephemeris of BU1099AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.129     73.0
-------------------------
1983.0     0.211    313.3
1984.0     0.218    316.3
1985.0     0.226    319.2
1986.0     0.233    321.8
1987.0     0.240    324.3
1988.0     0.247    326.6
1989.0     0.253    328.8
1990.0     0.259    330.9
1991.0     0.265    333.0
1992.0     0.270    334.9
1993.0     0.274    336.8
1994.0     0.278    338.6
1995.0     0.281    340.4
1996.0     0.284    342.2
1997.0     0.286    343.9
1998.0     0.287    345.6
1999.0     0.288    347.3
2000.0     0.288    348.9
2001.0     0.287    350.6
2002.0     0.286    352.3
2003.0     0.284    354.0
2004.0     0.282    355.7
2005.0     0.279    357.5
2006.0     0.275    359.3
2007.0     0.271      1.2
2008.0     0.266      3.1
2009.0     0.260      5.1
2010.0     0.254      7.2
2011.0     0.247      9.4
2012.0     0.239     11.8
2013.0     0.231     14.3
2014.0     0.223     17.0
2015.0     0.214     19.9
2016.0     0.205     23.1
2017.0     0.195     26.6
2018.0     0.185     30.4
2019.0     0.176     34.7
2020.0     0.166     39.5
2021.0     0.157     44.8
2022.0     0.148     50.8
2023.0     0.140     57.5
2024.0     0.134     64.9
2025.0     0.129     73.0
2026.0     0.125     81.6
2027.0     0.124     90.6
2028.0     0.125     99.5
2029.0     0.128    108.3
2030.0     0.132    116.6
2031.0     0.137    124.3
2032.0     0.144    131.3
2033.0     0.151    137.7
2034.0     0.158    143.5
2035.0     0.164    148.9
2036.0     0.171    153.8
2037.0     0.176    158.5
2038.0     0.180    162.9
2039.0     0.183    167.1
2040.0     0.185    171.2
2041.0     0.186    175.2
2042.0     0.185    179.3
2043.0     0.183    183.4
2044.0     0.181    187.6
2045.0     0.177    191.9
2046.0     0.173    196.4
2047.0     0.168    201.2
2048.0     0.163    206.3
2049.0     0.158    211.7
2050.0     0.153    217.5
2051.0     0.149    223.6
2052.0     0.145    230.0
2053.0     0.142    236.7
2054.0     0.141    243.7
2055.0     0.141    250.7
2056.0     0.142    257.7
2057.0     0.144    264.5
2058.0     0.147    271.1
2059.0     0.152    277.3
2060.0     0.157    283.1
2061.0     0.164    288.5
2062.0     0.171    293.5
2063.0     0.178    298.1
2064.0     0.186    302.3
2065.0     0.194    306.2
2066.0     0.202    309.7

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.