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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:34:20

Orbital Elements for STF2912BA,BB

WDS:	STF2912BA,BB	WDS ID/Discoverer
P:	2.113	Orbital period (years)
a:	0.0412	Semi-major axis (arcseconds)
i:	113.1	Inclination (degrees)
Ω:	266.9	Longitude of ascending node (degrees)
T:	2016.600	Epoch of periastron passage (year)
e:	0.193	Eccentricity
ω:	151.3	Longitude of periastron (degrees)
Start-Year:	2024.0	Year
End-Year:	2026.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2912BA,BB

Position:	222957. +042554.	Epoch-2000 right ascension and declination
WDS-ID:	22300+0426	WDS designation
Discoverer Code:	STF2912BA,BB	Discover designation and components
ADS number:	15988	Aitken Double Star catalog
HD number:	213235	HD catalog number
Hipparcos number:	111062	Hipparcos catalog number
V1:	7.84	Magnitude of the primary
V2:	8.22	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF2912BA,BB

WDS 6th Orbit including measures of STF2912BA,BB

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

Ephemeris of STF2912BA,BB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.026    106.4
-------------------------
2024.0     0.044    278.8
2025.0     0.026    106.4

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.