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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:44:39

Orbital Elements for BU957

WDS:	BU957	WDS ID/Discoverer
P:	91.100	Orbital period (years)
a:	0.287	Semi-major axis (arcseconds)
i:	101.1	Inclination (degrees)
Ω:	25.0	Longitude of ascending node (degrees)
T:	2030.200	Epoch of periastron passage (year)
e:	0.57	Eccentricity
ω:	28.8	Longitude of periastron (degrees)
Start-Year:	1980.0	Year
End-Year:	2070.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU957

Position:	171534.66-101750.9	Epoch-2000 right ascension and declination
WDS-ID:	17156-1018	WDS designation
Discoverer Code:	BU957	Discover designation and components
ADS number:	10421	Aitken Double Star catalog
HD number:	156023	HD catalog number
Hipparcos number:	84423	Hipparcos catalog number
V1:	7.51	Magnitude of the primary
V2:	9.69	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 BU957

WDS 6th Orbit including measures of BU957

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

Ephemeris of BU957

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.121     35.8
-------------------------
1980.0     0.414    200.4
1981.0     0.411    200.1
1982.0     0.408    199.8
1983.0     0.404    199.5
1984.0     0.400    199.2
1985.0     0.395    198.8
1986.0     0.390    198.5
1987.0     0.385    198.2
1988.0     0.378    197.8
1989.0     0.372    197.4
1990.0     0.365    197.1
1991.0     0.357    196.7
1992.0     0.349    196.3
1993.0     0.341    195.8
1994.0     0.332    195.4
1995.0     0.323    194.9
1996.0     0.314    194.4
1997.0     0.304    193.8
1998.0     0.293    193.3
1999.0     0.282    192.6
2000.0     0.271    192.0
2001.0     0.259    191.2
2002.0     0.247    190.4
2003.0     0.235    189.6
2004.0     0.222    188.6
2005.0     0.209    187.5
2006.0     0.196    186.2
2007.0     0.182    184.7
2008.0     0.168    183.1
2009.0     0.154    181.1
2010.0     0.139    178.7
2011.0     0.125    175.7
2012.0     0.110    171.9
2013.0     0.096    167.1
2014.0     0.082    160.5
2015.0     0.070    151.6
2016.0     0.060    139.1
2017.0     0.053    122.5
2018.0     0.051    103.1
2019.0     0.055     84.4
2020.0     0.063     69.4
2021.0     0.074     58.4
2022.0     0.086     50.4
2023.0     0.099     44.3
2024.0     0.110     39.6
2025.0     0.121     35.8
2026.0     0.128     32.5
2027.0     0.132     29.5
2028.0     0.132     26.5
2029.0     0.125     23.4
2030.0     0.112     19.8
2031.0     0.093     14.9
2032.0     0.070      7.0
2033.0     0.045    350.7
2034.0     0.030    309.1
2035.0     0.039    257.7
2036.0     0.062    235.9
2037.0     0.089    226.6
2038.0     0.115    221.5
2039.0     0.140    218.3
2040.0     0.164    216.1
2041.0     0.186    214.4
2042.0     0.207    213.1
2043.0     0.227    212.0
2044.0     0.246    211.0
2045.0     0.263    210.3
2046.0     0.279    209.6
2047.0     0.294    208.9
2048.0     0.308    208.4
2049.0     0.321    207.8
2050.0     0.333    207.4
2051.0     0.344    206.9
2052.0     0.355    206.5
2053.0     0.364    206.1
2054.0     0.372    205.7
2055.0     0.380    205.3
2056.0     0.387    205.0
2057.0     0.393    204.7
2058.0     0.399    204.3
2059.0     0.404    204.0
2060.0     0.408    203.7
2061.0     0.412    203.4
2062.0     0.414    203.1
2063.0     0.417    202.8
2064.0     0.418    202.5
2065.0     0.419    202.2
2066.0     0.420    201.9
2067.0     0.420    201.6
2068.0     0.419    201.3
2069.0     0.418    201.0

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.