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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:03:10

Orbital Elements for BU1295AB

WDS:	BU1295AB	WDS ID/Discoverer
P:	26.340	Orbital period (years)
a:	0.1727	Semi-major axis (arcseconds)
i:	138.4	Inclination (degrees)
Ω:	12.6	Longitude of ascending node (degrees)
T:	1988.980	Epoch of periastron passage (year)
e:	0.846	Eccentricity
ω:	42.9	Longitude of periastron (degrees)
Start-Year:	2012.0	Year
End-Year:	2038.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1295AB

Position:	043958.03+532823.7	Epoch-2000 right ascension and declination
WDS-ID:	04400+5328	WDS designation
Discoverer Code:	BU1295AB	Discover designation and components
ADS number:	3358	Aitken Double Star catalog
HD number:	29316	HD catalog number
Hipparcos number:	21730	Hipparcos catalog number
V1:	7.35	Magnitude of the primary
V2:	5.86	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1295AB

WDS 6th Orbit including measures of BU1295AB

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

Ephemeris of BU1295AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.281    164.8
-------------------------
2012.0     0.141    124.6
2013.0     0.110    114.2
2014.0     0.075     94.6
2015.0     0.037     36.6
2016.0     0.059    217.7
2017.0     0.118    195.3
2018.0     0.159    186.7
2019.0     0.191    181.4
2020.0     0.216    177.5
2021.0     0.236    174.3
2022.0     0.252    171.6
2023.0     0.265    169.1
2024.0     0.274    166.9
2025.0     0.281    164.8
2026.0     0.285    162.8
2027.0     0.286    160.8
2028.0     0.286    158.8
2029.0     0.283    156.8
2030.0     0.277    154.7
2031.0     0.270    152.5
2032.0     0.260    150.2
2033.0     0.249    147.7
2034.0     0.234    144.9
2035.0     0.218    141.8
2036.0     0.198    138.0
2037.0     0.176    133.4

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.