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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:46:53

Orbital Elements for STF2173AB

WDS:	STF2173AB	WDS ID/Discoverer
P:	46.520	Orbital period (years)
a:	0.9679	Semi-major axis (arcseconds)
i:	99.5	Inclination (degrees)
Ω:	331.8	Longitude of ascending node (degrees)
T:	2055.360	Epoch of periastron passage (year)
e:	0.171	Eccentricity
ω:	146.7	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2173AB

Position:	173023.78-010346.2	Epoch-2000 right ascension and declination
WDS-ID:	17304-0104	WDS designation
Discoverer Code:	STF2173AB	Discover designation and components
ADS number:	10598	Aitken Double Star catalog
HD number:	158614	HD catalog number
Hipparcos number:	85667	Hipparcos catalog number
V1:	6.06	Magnitude of the primary
V2:	6.17	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF2173AB

WDS 6th Orbit including measures of STF2173AB

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

Ephemeris of STF2173AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.342      1.9
-------------------------
2002.0     0.256    298.1
2003.0     0.159    267.9
2004.0     0.159    213.6
2005.0     0.255    183.1
2006.0     0.375    170.8
2007.0     0.493    164.4
2008.0     0.598    160.4
2009.0     0.688    157.6
2010.0     0.756    155.3
2011.0     0.802    153.4
2012.0     0.823    151.6
2013.0     0.822    149.9
2014.0     0.798    148.1
2015.0     0.753    146.1
2016.0     0.691    143.9
2017.0     0.615    141.1
2018.0     0.527    137.5
2019.0     0.432    132.3
2020.0     0.334    124.2
2021.0     0.243    109.5
2022.0     0.180     81.5
2023.0     0.182     42.8
2024.0     0.249     15.9
2025.0     0.342      1.9
2026.0     0.442    354.1
2027.0     0.541    349.1
2028.0     0.637    345.7
2029.0     0.726    343.2
2030.0     0.809    341.2
2031.0     0.883    339.5
2032.0     0.947    338.1
2033.0     1.001    336.9
2034.0     1.044    335.8
2035.0     1.076    334.7
2036.0     1.095    333.7
2037.0     1.102    332.7
2038.0     1.096    331.8
2039.0     1.076    330.8
2040.0     1.042    329.7
2041.0     0.995    328.6
2042.0     0.934    327.3
2043.0     0.859    325.8
2044.0     0.772    324.1
2045.0     0.672    321.8
2046.0     0.561    318.7
2047.0     0.442    313.9

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.