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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:25:56

Orbital Elements for I528AB

WDS:	I528AB	WDS ID/Discoverer
P:	31.800	Orbital period (years)
a:	0.086	Semi-major axis (arcseconds)
i:	58.2	Inclination (degrees)
Ω:	171.7	Longitude of ascending node (degrees)
T:	2022.310	Epoch of periastron passage (year)
e:	0.641	Eccentricity
ω:	77.1	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 I528AB

Position:	144520.60-360851.9	Epoch-2000 right ascension and declination
WDS-ID:	14453-3609	WDS designation
Discoverer Code:	I528AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	129732	HD catalog number
Hipparcos number:	72140	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	8.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for I528AB

WDS 6th Orbit including measures of I528AB

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

Ephemeris of I528AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.061    353.1
-------------------------
2010.0     0.072     79.8
2011.0     0.070     86.5
2012.0     0.069     93.6
2013.0     0.068    100.8
2014.0     0.067    108.4
2015.0     0.066    116.0
2016.0     0.065    123.9
2017.0     0.064    131.9
2018.0     0.062    140.3
2019.0     0.059    149.4
2020.0     0.053    160.1
2021.0     0.042    175.0
2022.0     0.022    210.3
2023.0     0.023    309.5
2024.0     0.045    341.1
2025.0     0.061    353.1
2026.0     0.072      0.7
2027.0     0.079      6.6
2028.0     0.084     11.7
2029.0     0.087     16.3
2030.0     0.089     20.6
2031.0     0.090     24.9
2032.0     0.090     29.1
2033.0     0.089     33.3
2034.0     0.087     37.7
2035.0     0.086     42.2
2036.0     0.084     46.9
2037.0     0.082     51.9
2038.0     0.080     57.1
2039.0     0.077     62.6

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.