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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:36:44

Orbital Elements for WRH21

WDS:	WRH21	WDS ID/Discoverer
P:	6.026	Orbital period (years)
a:	0.009689999999999999	Semi-major axis (arcseconds)
i:	91.4	Inclination (degrees)
Ω:	50.5	Longitude of ascending node (degrees)
T:	1997.853	Epoch of periastron passage (year)
e:	0.6797	Eccentricity
ω:	9.73	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 WRH21

Position:	161148.06+362530.6	Epoch-2000 right ascension and declination
WDS-ID:	16118+3626	WDS designation
Discoverer Code:	WRH21	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	145849	HD catalog number
Hipparcos number:	79358	Hipparcos catalog number
V1:	5.63	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1993	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for WRH21

WDS 6th Orbit including measures of WRH21

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

Ephemeris of WRH21

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.016    230.2
-------------------------
2022.0     0.003     49.7
2023.0     0.009    231.3
2024.0     0.015    230.6
2025.0     0.016    230.2
2026.0     0.013    229.8
2027.0     0.007    228.7

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.