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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:30:12

Orbital Elements for STF1937AB

WDS:	STF1937AB	WDS ID/Discoverer
P:	41.630	Orbital period (years)
a:	0.86226	Semi-major axis (arcseconds)
i:	58.084	Inclination (degrees)
Ω:	202.827	Longitude of ascending node (degrees)
T:	1975.547	Epoch of periastron passage (year)
e:	0.27907	Eccentricity
ω:	39.885	Longitude of periastron (degrees)
Start-Year:	2005.0	Year
End-Year:	2045.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1937AB

Position:	152312.23+301717.7	Epoch-2000 right ascension and declination
WDS-ID:	15232+3017	WDS designation
Discoverer Code:	STF1937AB	Discover designation and components
ADS number:	9617	Aitken Double Star catalog
HD number:	137107	HD catalog number
Hipparcos number:	75312	Hipparcos catalog number
V1:	5.64	Magnitude of the primary
V2:	5.95	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF1937AB

WDS 6th Orbit including measures of STF1937AB

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

Ephemeris of STF1937AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.699    358.7
-------------------------
2005.0     0.519    107.9
2006.0     0.506    120.4
2007.0     0.508    133.1
2008.0     0.526    145.4
2009.0     0.554    156.6
2010.0     0.589    166.7
2011.0     0.623    175.6
2012.0     0.651    183.6
2013.0     0.667    191.1
2014.0     0.665    198.4
2015.0     0.643    206.0
2016.0     0.598    214.4
2017.0     0.534    224.6
2018.0     0.460    237.9
2019.0     0.392    256.1
2020.0     0.356    280.0
2021.0     0.371    305.4
2022.0     0.432    326.0
2023.0     0.517    340.7
2024.0     0.609    351.1
2025.0     0.699    358.7
2026.0     0.780      4.7
2027.0     0.851      9.6
2028.0     0.911     13.8
2029.0     0.959     17.5
2030.0     0.996     21.0
2031.0     1.021     24.2
2032.0     1.035     27.2
2033.0     1.039     30.3
2034.0     1.033     33.3
2035.0     1.018     36.4
2036.0     0.994     39.6
2037.0     0.963     43.0
2038.0     0.925     46.7
2039.0     0.881     50.7
2040.0     0.832     55.2
2041.0     0.779     60.2
2042.0     0.725     66.0
2043.0     0.670     72.7
2044.0     0.618     80.6

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.