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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:20:14

Orbital Elements for YR1AA,AB

WDS:	YR1AA,AB	WDS ID/Discoverer
P:	13.350	Orbital period (years)
a:	0.1208	Semi-major axis (arcseconds)
i:	69.6	Inclination (degrees)
Ω:	167.8	Longitude of ascending node (degrees)
T:	2014.410	Epoch of periastron passage (year)
e:	0.024	Eccentricity
ω:	270.3	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for YR1AA,AB

Position:	002740.29-162434.3	Epoch-2000 right ascension and declination
WDS-ID:	00277-1625	WDS designation
Discoverer Code:	YR1AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	2394	HD catalog number
Hipparcos number:	2190	Hipparcos catalog number
V1:	7.51	Magnitude of the primary
V2:	8.72	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YR1AA,AB

WDS 6th Orbit including measures of YR1AA,AB

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

Ephemeris of YR1AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.117    352.5
-------------------------
2019.0     0.102    182.2
2020.0     0.069    201.4
2021.0     0.043    252.4
2022.0     0.064    309.6
2023.0     0.098    331.4
2024.0     0.118    342.9
2025.0     0.117    352.5
2026.0     0.094      4.5
2027.0     0.057     29.8
2028.0     0.043     97.4
2029.0     0.076    141.6
2030.0     0.108    157.8

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.