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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:02:15

Orbital Elements for YSC13

WDS:	YSC13	WDS ID/Discoverer
P:	11.937	Orbital period (years)
a:	0.094	Semi-major axis (arcseconds)
i:	44.4	Inclination (degrees)
Ω:	41.4	Longitude of ascending node (degrees)
T:	2014.324	Epoch of periastron passage (year)
e:	0.761	Eccentricity
ω:	267.3	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 YSC13

Position:	190239.41+430702.9	Epoch-2000 right ascension and declination
WDS-ID:	19027+4307	WDS designation
Discoverer Code:	YSC13	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	177412	HD catalog number
Hipparcos number:	93511	Hipparcos catalog number
V1:	8.3	Magnitude of the primary
V2:	9.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for YSC13

WDS 6th Orbit including measures of YSC13

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

Ephemeris of YSC13

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.072    184.8
-------------------------
2020.0     0.118    125.0
2021.0     0.117    133.9
2022.0     0.113    143.2
2023.0     0.105    153.6
2024.0     0.092    166.4
2025.0     0.072    184.8
2026.0     0.031    233.8
2027.0     0.056     57.7
2028.0     0.085     82.3
2029.0     0.101     96.4

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.