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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:00:52

Orbital Elements for SIG4

WDS:	SIG4	WDS ID/Discoverer
P:	54.130	Orbital period (years)
a:	0.501	Semi-major axis (arcseconds)
i:	180.0	Inclination (degrees)
Ω:	105.1	Longitude of ascending node (degrees)
T:	1978.220	Epoch of periastron passage (year)
e:	0.056	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SIG4

Position:	042918.43-312356.8	Epoch-2000 right ascension and declination
WDS-ID:	04293-3124	WDS designation
Discoverer Code:	SIG4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	11.18	Magnitude of the primary
V2:	12.38	Magnitude of the secondary
Equinox:		Equinox
Date:	2020	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for SIG4

WDS 6th Orbit including measures of SIG4

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

Ephemeris of SIG4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.483    159.0
-------------------------
1998.0     0.520    329.0
1999.0     0.523    322.8
2000.0     0.524    316.8
2001.0     0.526    310.7
2002.0     0.527    304.7
2003.0     0.528    298.7
2004.0     0.529    292.8
2005.0     0.529    286.8
2006.0     0.529    280.8
2007.0     0.529    274.9
2008.0     0.528    268.9
2009.0     0.527    262.9
2010.0     0.525    256.9
2011.0     0.524    250.8
2012.0     0.522    244.7
2013.0     0.519    238.6
2014.0     0.517    232.4
2015.0     0.514    226.1
2016.0     0.511    219.8
2017.0     0.508    213.4
2018.0     0.505    206.9
2019.0     0.502    200.3
2020.0     0.499    193.6
2021.0     0.495    186.9
2022.0     0.492    180.1
2023.0     0.489    173.1
2024.0     0.486    166.1
2025.0     0.483    159.0
2026.0     0.481    151.9
2027.0     0.479    144.6
2028.0     0.477    137.3
2029.0     0.475    130.0
2030.0     0.474    122.6
2031.0     0.473    115.2
2032.0     0.473    107.7
2033.0     0.473    100.3
2034.0     0.474     92.8
2035.0     0.474     85.4
2036.0     0.476     78.0
2037.0     0.477     70.7
2038.0     0.479     63.4
2039.0     0.482     56.2
2040.0     0.484     49.0
2041.0     0.487     42.0
2042.0     0.490     35.0
2043.0     0.493     28.1
2044.0     0.496     21.3
2045.0     0.500     14.6
2046.0     0.503      7.9
2047.0     0.506      1.4
2048.0     0.509    354.9
2049.0     0.512    348.5
2050.0     0.515    342.2
2051.0     0.518    336.0

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.