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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:43:42

Orbital Elements for STA1

WDS:	STA1	WDS ID/Discoverer
P:	6.570	Orbital period (years)
a:	0.096	Semi-major axis (arcseconds)
i:	68.6	Inclination (degrees)
Ω:	14.8	Longitude of ascending node (degrees)
T:	1999.260	Epoch of periastron passage (year)
e:	0.225	Eccentricity
ω:	285.4	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 STA1

Position:	170847.23+654252.7	Epoch-2000 right ascension and declination
WDS-ID:	17088+6543	WDS designation
Discoverer Code:	STA1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	155763	HD catalog number
Hipparcos number:	83895	Hipparcos catalog number
V1:	3.17	Magnitude of the primary
V2:	4.2	Magnitude of the secondary
Equinox:		Equinox
Date:	1994	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STA1

WDS 6th Orbit including measures of STA1

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

Ephemeris of STA1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.047    226.3
-------------------------
2022.0     0.044    121.6
2023.0     0.083    173.1
2024.0     0.098    193.2
2025.0     0.047    226.3
2026.0     0.066      0.5
2027.0     0.085     27.3

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.