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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:05:12

Orbital Elements for CHR242AA,AB

WDS:	CHR242AA,AB	WDS ID/Discoverer
P:	13.470	Orbital period (years)
a:	0.137	Semi-major axis (arcseconds)
i:	115.7	Inclination (degrees)
Ω:	123.7	Longitude of ascending node (degrees)
T:	2010.740	Epoch of periastron passage (year)
e:	0.563	Eccentricity
ω:	211.0	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 CHR242AA,AB

Position:	112458.83-315957.5	Epoch-2000 right ascension and declination
WDS-ID:	11250-3200	WDS designation
Discoverer Code:	CHR242AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	99240	HD catalog number
Hipparcos number:	55714	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	8.9	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CHR242AA,AB

WDS 6th Orbit including measures of CHR242AA,AB

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

Ephemeris of CHR242AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.040    182.6
-------------------------
2019.0     0.159    100.1
2020.0     0.128     91.4
2021.0     0.093     76.4
2022.0     0.061     43.6
2023.0     0.058    345.9
2024.0     0.061    300.6
2025.0     0.040    182.6
2026.0     0.106    139.9
2027.0     0.155    129.3
2028.0     0.183    123.1
2029.0     0.197    118.1
2030.0     0.198    113.6

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.