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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:57:01

Orbital Elements for B389

WDS:	B389	WDS ID/Discoverer
P:	92.600	Orbital period (years)
a:	0.326	Semi-major axis (arcseconds)
i:	114.5	Inclination (degrees)
Ω:	194.8	Longitude of ascending node (degrees)
T:	1993.630	Epoch of periastron passage (year)
e:	0.472	Eccentricity
ω:	158.2	Longitude of periastron (degrees)
Start-Year:	1979.0	Year
End-Year:	2071.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B389

Position:	182253.64-252416.4	Epoch-2000 right ascension and declination
WDS-ID:	18229-2524	WDS designation
Discoverer Code:	B389	Discover designation and components
ADS number:	11290	Aitken Double Star catalog
HD number:	168836	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.6	Magnitude of the primary
V2:	9.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for B389

WDS 6th Orbit including measures of B389

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

Ephemeris of B389

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.332    218.6
-------------------------
1979.0     0.235    171.8
1980.0     0.215    168.8
1981.0     0.194    165.2
1982.0     0.174    160.7
1983.0     0.153    155.0
1984.0     0.133    147.6
1985.0     0.114    137.6
1986.0     0.099    124.2
1987.0     0.090    107.1
1988.0     0.089     87.8
1989.0     0.095     69.7
1990.0     0.108     55.0
1991.0     0.124     43.7
1992.0     0.140     35.0
1993.0     0.154     28.0
1994.0     0.166     22.1
1995.0     0.174     16.9
1996.0     0.178     12.1
1997.0     0.178      7.3
1998.0     0.176      2.5
1999.0     0.170    357.5
2000.0     0.163    352.1
2001.0     0.155    346.1
2002.0     0.147    339.5
2003.0     0.138    332.0
2004.0     0.132    323.7
2005.0     0.127    314.6
2006.0     0.124    305.0
2007.0     0.124    295.1
2008.0     0.127    285.5
2009.0     0.133    276.5
2010.0     0.141    268.4
2011.0     0.150    261.2
2012.0     0.162    255.0
2013.0     0.174    249.7
2014.0     0.187    245.0
2015.0     0.200    241.0
2016.0     0.214    237.5
2017.0     0.228    234.4
2018.0     0.242    231.6
2019.0     0.255    229.2
2020.0     0.269    227.0
2021.0     0.282    225.0
2022.0     0.295    223.2
2023.0     0.308    221.5
2024.0     0.320    220.0
2025.0     0.332    218.6
2026.0     0.343    217.2
2027.0     0.354    216.0
2028.0     0.365    214.8
2029.0     0.375    213.7
2030.0     0.385    212.7
2031.0     0.394    211.7
2032.0     0.402    210.7
2033.0     0.410    209.8
2034.0     0.418    208.9
2035.0     0.425    208.1
2036.0     0.431    207.3
2037.0     0.437    206.5
2038.0     0.443    205.7
2039.0     0.448    204.9
2040.0     0.452    204.2
2041.0     0.456    203.4
2042.0     0.459    202.7
2043.0     0.461    202.0
2044.0     0.463    201.3
2045.0     0.464    200.6
2046.0     0.465    199.9
2047.0     0.465    199.2
2048.0     0.465    198.5
2049.0     0.463    197.8
2050.0     0.461    197.1
2051.0     0.459    196.4
2052.0     0.456    195.6
2053.0     0.452    194.9
2054.0     0.447    194.2
2055.0     0.442    193.4
2056.0     0.436    192.6
2057.0     0.429    191.8
2058.0     0.421    191.0
2059.0     0.413    190.1
2060.0     0.404    189.2
2061.0     0.394    188.2
2062.0     0.383    187.2
2063.0     0.371    186.2
2064.0     0.359    185.0
2065.0     0.345    183.8
2066.0     0.331    182.5
2067.0     0.316    181.1
2068.0     0.300    179.5
2069.0     0.283    177.7
2070.0     0.265    175.7

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.