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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:08:48

Orbital Elements for BLA6

WDS:	BLA6	WDS ID/Discoverer
P:	10.110	Orbital period (years)
a:	0.051	Semi-major axis (arcseconds)
i:	140.0	Inclination (degrees)
Ω:	170.2	Longitude of ascending node (degrees)
T:	1979.930	Epoch of periastron passage (year)
e:	0.44	Eccentricity
ω:	257.7	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BLA6

Position:	194723.27+183203.3	Epoch-2000 right ascension and declination
WDS-ID:	19474+1832	WDS designation
Discoverer Code:	BLA6	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	187076	HD catalog number
Hipparcos number:	97365	Hipparcos catalog number
V1:	4.32	Magnitude of the primary
V2:	4.95	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 BLA6

WDS 6th Orbit including measures of BLA6

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

Ephemeris of BLA6

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.058    104.3
-------------------------
2020.0     0.027    316.1
2021.0     0.030    207.3
2022.0     0.048    164.5
2023.0     0.057    141.7
2024.0     0.059    122.8
2025.0     0.058    104.3
2026.0     0.056     84.6
2027.0     0.053     63.2
2028.0     0.050     39.3
2029.0     0.044     11.0

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.