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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:48:06

Orbital Elements for WSI127AB

WDS:	WSI127AB	WDS ID/Discoverer
P:	31.980	Orbital period (years)
a:	0.3907	Semi-major axis (arcseconds)
i:	0.0	Inclination (degrees)
Ω:	284.0	Longitude of ascending node (degrees)
T:	2010.470	Epoch of periastron passage (year)
e:	0.0	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI127AB

Position:	093657.83-261011.2	Epoch-2000 right ascension and declination
WDS-ID:	09370-2610	WDS designation
Discoverer Code:	WSI127AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	13.8	Magnitude of the primary
V2:	14.3	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for WSI127AB

WDS 6th Orbit including measures of WSI127AB

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

Ephemeris of WSI127AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.391     87.6
-------------------------
2010.0     0.391    278.7
2011.0     0.391    290.0
2012.0     0.391    301.2
2013.0     0.391    312.5
2014.0     0.391    323.7
2015.0     0.391    335.0
2016.0     0.391    346.3
2017.0     0.391    357.5
2018.0     0.391      8.8
2019.0     0.391     20.0
2020.0     0.391     31.3
2021.0     0.391     42.5
2022.0     0.391     53.8
2023.0     0.391     65.1
2024.0     0.391     76.3
2025.0     0.391     87.6
2026.0     0.391     98.8
2027.0     0.391    110.1
2028.0     0.391    121.3
2029.0     0.391    132.6
2030.0     0.391    143.8
2031.0     0.391    155.1
2032.0     0.391    166.4
2033.0     0.391    177.6
2034.0     0.391    188.9
2035.0     0.391    200.1
2036.0     0.391    211.4
2037.0     0.391    222.6
2038.0     0.391    233.9
2039.0     0.391    245.2

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.