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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:39:21

Orbital Elements for BD+312859

WDS:	BD+312859	WDS ID/Discoverer
P:	2.795	Orbital period (years)
a:	0.013699999999999999	Semi-major axis (arcseconds)
i:	66.0	Inclination (degrees)
Ω:	293.0	Longitude of ascending node (degrees)
T:	1991.733	Epoch of periastron passage (year)
e:	0.46	Eccentricity
ω:	125.0	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 BD+312859

Position:	163055.24+305627.2	Epoch-2000 right ascension and declination
WDS-ID:	16309+3056	WDS designation
Discoverer Code:	BD+312859	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	149044	HD catalog number
Hipparcos number:	80884	Hipparcos catalog number
V1:	7.18	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:		Flags

Double Star Orbit for BD+312859

WDS 6th Orbit including measures of BD+312859

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

Ephemeris of BD+312859

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.008    311.9
-------------------------
2024.0     0.015    268.3
2025.0     0.008    311.9

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.