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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:27:36

Orbital Elements for I227AB

WDS:	I227AB	WDS ID/Discoverer
P:	40.870	Orbital period (years)
a:	0.253	Semi-major axis (arcseconds)
i:	133.8	Inclination (degrees)
Ω:	117.4	Longitude of ascending node (degrees)
T:	2038.140	Epoch of periastron passage (year)
e:	0.9	Eccentricity
ω:	209.6	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 I227AB

Position:	145630.78-343754.2	Epoch-2000 right ascension and declination
WDS-ID:	14565-3438	WDS designation
Discoverer Code:	I227AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	131751	HD catalog number
Hipparcos number:	73108	Hipparcos catalog number
V1:	8.06	Magnitude of the primary
V2:	8.39	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for I227AB

WDS 6th Orbit including measures of I227AB

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

Ephemeris of I227AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.394     89.1
-------------------------
2005.0     0.344    108.4
2006.0     0.364    107.0
2007.0     0.381    105.8
2008.0     0.397    104.7
2009.0     0.410    103.6
2010.0     0.420    102.6
2011.0     0.430    101.7
2012.0     0.437    100.8
2013.0     0.443     99.9
2014.0     0.447     99.1
2015.0     0.450     98.2
2016.0     0.451     97.4
2017.0     0.450     96.5
2018.0     0.448     95.7
2019.0     0.445     94.8
2020.0     0.440     94.0
2021.0     0.434     93.1
2022.0     0.427     92.2
2023.0     0.417     91.2
2024.0     0.407     90.2
2025.0     0.394     89.1
2026.0     0.381     88.0
2027.0     0.365     86.8
2028.0     0.348     85.5
2029.0     0.328     84.0
2030.0     0.307     82.3
2031.0     0.283     80.3
2032.0     0.257     78.0
2033.0     0.228     75.1
2034.0     0.196     71.3
2035.0     0.160     65.9
2036.0     0.119     57.0
2037.0     0.072     37.2
2038.0     0.029    310.2
2039.0     0.078    140.6
2040.0     0.144    126.0
2041.0     0.194    120.0
2042.0     0.235    116.2
2043.0     0.269    113.6
2044.0     0.299    111.4

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.