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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:40:32

Orbital Elements for DEL1BA,BB

WDS:	DEL1BA,BB	WDS ID/Discoverer
P:	63.100	Orbital period (years)
a:	0.767	Semi-major axis (arcseconds)
i:	117.0	Inclination (degrees)
Ω:	11.6	Longitude of ascending node (degrees)
T:	1989.500	Epoch of periastron passage (year)
e:	0.327	Eccentricity
ω:	31.1	Longitude of periastron (degrees)
Start-Year:	1994.0	Year
End-Year:	2056.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DEL1BA,BB

Position:	083137.44+192349.5	Epoch-2000 right ascension and declination
WDS-ID:	08317+1924	WDS designation
Discoverer Code:	DEL1BA,BB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	41824	Hipparcos catalog number
V1:	13.8	Magnitude of the primary
V2:	14.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for DEL1BA,BB

WDS 6th Orbit including measures of DEL1BA,BB

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

Ephemeris of DEL1BA,BB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.797    168.5
-------------------------
1994.0     0.268    300.1
1995.0     0.267    279.7
1996.0     0.293    261.0
1997.0     0.337    246.3
1998.0     0.393    235.4
1999.0     0.453    227.3
2000.0     0.514    221.1
2001.0     0.574    216.3
2002.0     0.630    212.3
2003.0     0.683    209.0
2004.0     0.732    206.1
2005.0     0.776    203.5
2006.0     0.816    201.3
2007.0     0.851    199.2
2008.0     0.882    197.3
2009.0     0.908    195.5
2010.0     0.929    193.8
2011.0     0.946    192.1
2012.0     0.959    190.6
2013.0     0.968    189.0
2014.0     0.973    187.5
2015.0     0.974    186.0
2016.0     0.971    184.4
2017.0     0.965    182.9
2018.0     0.955    181.3
2019.0     0.941    179.7
2020.0     0.925    178.1
2021.0     0.905    176.4
2022.0     0.882    174.6
2023.0     0.856    172.7
2024.0     0.828    170.6
2025.0     0.797    168.5
2026.0     0.764    166.1
2027.0     0.729    163.5
2028.0     0.692    160.7
2029.0     0.654    157.5
2030.0     0.615    153.9
2031.0     0.576    149.8
2032.0     0.537    145.2
2033.0     0.499    139.8
2034.0     0.463    133.6
2035.0     0.431    126.4
2036.0     0.404    118.1
2037.0     0.384    108.8
2038.0     0.372     98.6
2039.0     0.369     88.1
2040.0     0.375     77.6
2041.0     0.389     67.7
2042.0     0.410     58.7
2043.0     0.436     50.6
2044.0     0.462     43.5
2045.0     0.489     37.1
2046.0     0.512     31.3
2047.0     0.530     26.1
2048.0     0.541     21.0
2049.0     0.543     16.2
2050.0     0.534     11.2
2051.0     0.514      6.0
2052.0     0.482      0.2
2053.0     0.441    353.4
2054.0     0.392    345.1
2055.0     0.343    334.4

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.