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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:57:18

Orbital Elements for A1938

WDS:	A1938	WDS ID/Discoverer
P:	7.210	Orbital period (years)
a:	0.13302	Semi-major axis (arcseconds)
i:	66.942	Inclination (degrees)
Ω:	144.296	Longitude of ascending node (degrees)
T:	2005.124	Epoch of periastron passage (year)
e:	0.3301	Eccentricity
ω:	306.658	Longitude of periastron (degrees)
Start-Year:	2022.0	Year
End-Year:	2028.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1938

Position:	041333.11+074257.7	Epoch-2000 right ascension and declination
WDS-ID:	04136+0743	WDS designation
Discoverer Code:	A1938	Discover designation and components
ADS number:	3064	Aitken Double Star catalog
HD number:	26690	HD catalog number
Hipparcos number:	19719	Hipparcos catalog number
V1:	5.7	Magnitude of the primary
V2:	6.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2007	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1938

WDS 6th Orbit including measures of A1938

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

Ephemeris of A1938

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.145    325.5
-------------------------
2022.0     0.066    245.8
2023.0     0.112    292.9
2024.0     0.151    311.5
2025.0     0.145    325.5
2026.0     0.068    355.3
2027.0     0.082    132.6

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.