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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:36:14

Orbital Elements for ELP1AA,AB

WDS:	ELP1AA,AB	WDS ID/Discoverer
P:	14.420	Orbital period (years)
a:	0.13	Semi-major axis (arcseconds)
i:	139.7	Inclination (degrees)
Ω:	122.3	Longitude of ascending node (degrees)
T:	2020.000	Epoch of periastron passage (year)
e:	0.032	Eccentricity
ω:	14.7	Longitude of periastron (degrees)
Start-Year:	2018.0	Year
End-Year:	2032.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ELP1AA,AB

Position:	023032.41-434223.3	Epoch-2000 right ascension and declination
WDS-ID:	02305-4342	WDS designation
Discoverer Code:	ELP1AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	10.2	Magnitude of the primary
V2:	11.1	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for ELP1AA,AB

WDS 6th Orbit including measures of ELP1AA,AB

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

Ephemeris of ELP1AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.122    332.7
-------------------------
2018.0     0.117    153.2
2019.0     0.125    131.4
2020.0     0.124    111.0
2021.0     0.114     88.5
2022.0     0.102     60.8
2023.0     0.099     28.1
2024.0     0.107    357.3
2025.0     0.122    332.7
2026.0     0.132    312.9
2027.0     0.133    294.8
2028.0     0.125    275.8
2029.0     0.112    252.8
2030.0     0.101    224.1
2031.0     0.102    192.1

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.