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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:03:01

Orbital Elements for I1489

WDS:	I1489	WDS ID/Discoverer
P:	32.790	Orbital period (years)
a:	0.27	Semi-major axis (arcseconds)
i:	84.1	Inclination (degrees)
Ω:	83.1	Longitude of ascending node (degrees)
T:	1997.790	Epoch of periastron passage (year)
e:	0.181	Eccentricity
ω:	281.6	Longitude of periastron (degrees)
Start-Year:	2009.0	Year
End-Year:	2041.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I1489

Position:	043931.59-450724.4	Epoch-2000 right ascension and declination
WDS-ID:	04395-4507	WDS designation
Discoverer Code:	I1489	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	29803	HD catalog number
Hipparcos number:	21698	Hipparcos catalog number
V1:	9.45	Magnitude of the primary
V2:	10.23	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for I1489

WDS 6th Orbit including measures of I1489

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

Ephemeris of I1489

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.238    265.3
-------------------------
2009.0     0.154     93.2
2010.0     0.117     97.7
2011.0     0.079    106.4
2012.0     0.044    130.4
2013.0     0.035    195.4
2014.0     0.065    233.3
2015.0     0.103    245.5
2016.0     0.141    251.1
2017.0     0.176    254.3
2018.0     0.207    256.5
2019.0     0.234    258.2
2020.0     0.255    259.5
2021.0     0.269    260.7
2022.0     0.275    261.8
2023.0     0.273    262.9
2024.0     0.261    264.0
2025.0     0.238    265.3
2026.0     0.206    266.9
2027.0     0.164    269.3
2028.0     0.113    273.7
2029.0     0.057    286.1
2030.0     0.024     14.2
2031.0     0.073     65.9
2032.0     0.127     74.5
2033.0     0.175     78.1
2034.0     0.212     80.3
2035.0     0.238     81.9
2036.0     0.253     83.2
2037.0     0.256     84.4
2038.0     0.249     85.7
2039.0     0.233     87.1
2040.0     0.209     88.7

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.