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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:58:59

Orbital Elements for A88AB

WDS:	A88AB	WDS ID/Discoverer
P:	12.135	Orbital period (years)
a:	0.1461	Semi-major axis (arcseconds)
i:	123.9	Inclination (degrees)
Ω:	173.4	Longitude of ascending node (degrees)
T:	2007.180	Epoch of periastron passage (year)
e:	0.2567	Eccentricity
ω:	79.7	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 A88AB

Position:	183823.80-031137.4	Epoch-2000 right ascension and declination
WDS-ID:	18384-0312	WDS designation
Discoverer Code:	A88AB	Discover designation and components
ADS number:	11520	Aitken Double Star catalog
HD number:	172088	HD catalog number
Hipparcos number:	91394	Hipparcos catalog number
V1:	7.22	Magnitude of the primary
V2:	7.51	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A88AB

WDS 6th Orbit including measures of A88AB

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

Ephemeris of A88AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.112    292.5
-------------------------
2019.0     0.073    125.3
2020.0     0.074     44.3
2021.0     0.122      6.8
2022.0     0.148    348.5
2023.0     0.148    333.2
2024.0     0.132    315.9
2025.0     0.112    292.5
2026.0     0.102    261.7
2027.0     0.110    230.3
2028.0     0.127    205.7
2029.0     0.137    186.5
2030.0     0.123    167.0

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.