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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:22:36

Orbital Elements for YSC72

WDS:	YSC72	WDS ID/Discoverer
P:	12.120	Orbital period (years)
a:	0.11	Semi-major axis (arcseconds)
i:	129.5	Inclination (degrees)
Ω:	134.2	Longitude of ascending node (degrees)
T:	2013.030	Epoch of periastron passage (year)
e:	0.828	Eccentricity
ω:	150.5	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 YSC72

Position:	213421.07-074445.8	Epoch-2000 right ascension and declination
WDS-ID:	21344-0745	WDS designation
Discoverer Code:	YSC72	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	106510	Hipparcos catalog number
V1:	10.9	Magnitude of the primary
V2:	12.5	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YSC72

WDS 6th Orbit including measures of YSC72

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

Ephemeris of YSC72

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.017     54.4
-------------------------
2019.0     0.186    154.3
2020.0     0.187    150.7
2021.0     0.181    146.9
2022.0     0.166    142.7
2023.0     0.139    137.2
2024.0     0.095    127.8
2025.0     0.017     54.4
2026.0     0.052    204.3
2027.0     0.097    179.3
2028.0     0.132    169.5
2029.0     0.157    163.3
2030.0     0.175    158.7

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.