| - Revision: |
$Rev: 1216 $ |
|
| - Report created: |
2025-07-11 19:29:45 |
| WDS: | A889 | WDS ID/Discoverer |
| P: | 20.780 | Orbital period (years) |
| a: | 0.17 | Semi-major axis (arcseconds) |
| i: | 43.7 | Inclination (degrees) |
| Ω: | 40.6 | Longitude of ascending node (degrees) |
| T: | 1954.280 | Epoch of periastron passage (year) |
| e: | 0.35 | Eccentricity |
| ω: | 183.5 | Longitude of periastron (degrees) |
| Start-Year: | 2015.0 | Year |
| End-Year: | 2035.0 | Year |
| Epoch: | 2025.0 | Besselian Epoch |
| Position: | 215102.11+291032.8 | Epoch-2000 right ascension and declination |
| WDS-ID: | 21510+2911 | WDS designation |
| Discoverer Code: | A889 | Discover designation and components |
| ADS number: | 15378 | Aitken Double Star catalog |
| HD number: | 207794 | HD catalog number |
| Hipparcos number: | 107849 | Hipparcos catalog number |
| V1: | 9.23 | Magnitude of the primary |
| V2: | 10.48 | Magnitude of the secondary |
| Equinox: | Equinox | |
| Date: | 1981 | Date of last observation |
| Orbit grade: | 3 | Orbit grade, ranging from 1 'definitive' to 5 'indeterminate' |
| Flags: | n | Flags |
Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)
Year Sep[“] PA[°] --------------------------------------------- 2025.0 0.220 29.8 ------------------------- 2015.0 0.104 176.2 2016.0 0.110 205.9 2017.0 0.109 233.8 2018.0 0.101 264.5 2019.0 0.101 298.3 2020.0 0.117 327.6 2021.0 0.141 348.5 2022.0 0.166 3.0 2023.0 0.189 13.8 2024.0 0.207 22.4 2025.0 0.220 29.8 2026.0 0.227 36.6 2027.0 0.229 43.1 2028.0 0.226 49.6 2029.0 0.216 56.5 2030.0 0.202 64.3 2031.0 0.183 73.4 2032.0 0.160 85.0 2033.0 0.136 100.6 2034.0 0.115 122.5