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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:58:48

Orbital Elements for B1935AB

WDS:	B1935AB	WDS ID/Discoverer
P:	21.220	Orbital period (years)
a:	0.234	Semi-major axis (arcseconds)
i:	155.2	Inclination (degrees)
Ω:	239.5	Longitude of ascending node (degrees)
T:	2002.160	Epoch of periastron passage (year)
e:	0.505	Eccentricity
ω:	310.9	Longitude of periastron (degrees)
Start-Year:	2015.0	Year
End-Year:	2035.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B1935AB

Position:	042128.80-205454.2	Epoch-2000 right ascension and declination
WDS-ID:	04215-2055	WDS designation
Discoverer Code:	B1935AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	27701	HD catalog number
Hipparcos number:	20342	Hipparcos catalog number
V1:	8.91	Magnitude of the primary
V2:	10.15	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2013	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for B1935AB

WDS 6th Orbit including measures of B1935AB

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

Ephemeris of B1935AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.154    213.3
-------------------------
2015.0     0.331     91.3
2016.0     0.322     84.5
2017.0     0.307     77.2
2018.0     0.287     69.0
2019.0     0.260     59.2
2020.0     0.225     46.8
2021.0     0.183     29.3
2022.0     0.137      0.3
2023.0     0.109    309.2
2024.0     0.123    251.9
2025.0     0.154    213.3
2026.0     0.186    187.9
2027.0     0.215    169.7
2028.0     0.243    155.8
2029.0     0.267    144.6
2030.0     0.288    135.1
2031.0     0.305    126.8
2032.0     0.319    119.3
2033.0     0.328    112.4
2034.0     0.334    105.8

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.