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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:01:45

Orbital Elements for RHOTAU

WDS:	RHOTAU	WDS ID/Discoverer
P:	0.288	Orbital period (years)
a:	0.0024100000000000002	Semi-major axis (arcseconds)
i:	96.21	Inclination (degrees)
Ω:	60.82	Longitude of ascending node (degrees)
T:	1991.324	Epoch of periastron passage (year)
e:	0.0	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	2025.0	Year
End-Year:	2025.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RHOTAU

Position:	043350.86+145040.2	Epoch-2000 right ascension and declination
WDS-ID:	04338+1451	WDS designation
Discoverer Code:	RHOTAU	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	28910	HD catalog number
Hipparcos number:	21273	Hipparcos catalog number
V1:	4.66	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for RHOTAU

WDS 6th Orbit including measures of RHOTAU

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

Ephemeris of RHOTAU

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.000    191.0
-------------------------

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.