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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:04:15

Orbital Elements for STF1523AB

WDS:	STF1523AB	WDS ID/Discoverer
P:	59.890	Orbital period (years)
a:	2.50442	Semi-major axis (arcseconds)
i:	122.187	Inclination (degrees)
Ω:	100.939	Longitude of ascending node (degrees)
T:	1935.170	Epoch of periastron passage (year)
e:	0.40432	Eccentricity
ω:	126.964	Longitude of periastron (degrees)
Start-Year:	1996.0	Year
End-Year:	2054.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1523AB

Position:	111810.90+313145.0	Epoch-2000 right ascension and declination
WDS-ID:	11182+3132	WDS designation
Discoverer Code:	STF1523AB	Discover designation and components
ADS number:	8119	Aitken Double Star catalog
HD number:	98231	HD catalog number
Hipparcos number:	55203	Hipparcos catalog number
V1:	4.33	Magnitude of the primary
V2:	4.80	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF1523AB

WDS 6th Orbit including measures of STF1523AB

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

Ephemeris of STF1523AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     2.591    136.2
-------------------------
1996.0     1.279    304.0
1997.0     1.456    294.1
1998.0     1.600    286.3
1999.0     1.704    279.6
2000.0     1.770    273.5
2001.0     1.803    267.8
2002.0     1.809    262.1
2003.0     1.795    256.5
2004.0     1.767    250.7
2005.0     1.732    244.7
2006.0     1.694    238.4
2007.0     1.658    231.9
2008.0     1.629    225.1
2009.0     1.608    218.1
2010.0     1.599    210.9
2011.0     1.604    203.8
2012.0     1.622    196.7
2013.0     1.655    189.8
2014.0     1.701    183.3
2015.0     1.758    177.1
2016.0     1.825    171.4
2017.0     1.901    166.1
2018.0     1.982    161.2
2019.0     2.068    156.8
2020.0     2.156    152.6
2021.0     2.246    148.8
2022.0     2.335    145.3
2023.0     2.423    142.1
2024.0     2.509    139.1
2025.0     2.591    136.2
2026.0     2.668    133.6
2027.0     2.741    131.1
2028.0     2.807    128.7
2029.0     2.867    126.4
2030.0     2.919    124.2
2031.0     2.963    122.1
2032.0     2.998    120.0
2033.0     3.023    118.0
2034.0     3.038    116.0
2035.0     3.042    114.0
2036.0     3.034    112.0
2037.0     3.014    110.0
2038.0     2.979    108.0
2039.0     2.930    105.9
2040.0     2.866    103.7
2041.0     2.785    101.4
2042.0     2.687     98.9
2043.0     2.570     96.3
2044.0     2.433     93.3
2045.0     2.277     90.0
2046.0     2.100     86.2
2047.0     1.903     81.6
2048.0     1.687     75.9
2049.0     1.460     68.4
2050.0     1.230     58.2
2051.0     1.021     43.5
2052.0     0.875     22.6
2053.0     0.843    357.0

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.