| - Revision: |
$Rev: 1216 $ |
|
| - Report created: |
2025-07-11 16:19:53 |
| WDS: | HDS56AB | WDS ID/Discoverer |
| P: | 28.050 | Orbital period (years) |
| a: | 0.23 | Semi-major axis (arcseconds) |
| i: | 164.0 | Inclination (degrees) |
| Ω: | 96.1 | Longitude of ascending node (degrees) |
| T: | 1999.290 | Epoch of periastron passage (year) |
| e: | 0.481 | Eccentricity |
| ω: | 358.9 | Longitude of periastron (degrees) |
| Start-Year: | 2011.0 | Year |
| End-Year: | 2039.0 | Year |
| Epoch: | 2025.0 | Besselian Epoch |
| Position: | 002508.74+480251.0 | Epoch-2000 right ascension and declination |
| WDS-ID: | 00251+4803 | WDS designation |
| Discoverer Code: | HDS56AB | Discover designation and components |
| ADS number: | . | Aitken Double Star catalog |
| HD number: | 2057 | HD catalog number |
| Hipparcos number: | 1987 | Hipparcos catalog number |
| V1: | 7.72 | Magnitude of the primary |
| V2: | 10.63 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 2007 | 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 0.155 175.3 ------------------------- 2011.0 0.333 288.7 2012.0 0.338 283.7 2013.0 0.340 278.7 2014.0 0.340 273.8 2015.0 0.337 268.8 2016.0 0.331 263.7 2017.0 0.322 258.3 2018.0 0.310 252.6 2019.0 0.296 246.4 2020.0 0.279 239.4 2021.0 0.258 231.5 2022.0 0.235 222.1 2023.0 0.210 210.5 2024.0 0.182 195.6 2025.0 0.155 175.3 2026.0 0.133 147.3 2027.0 0.120 110.7 2028.0 0.123 71.2 2029.0 0.139 37.2 2030.0 0.164 12.0 2031.0 0.191 353.7 2032.0 0.218 339.9 2033.0 0.243 329.1 2034.0 0.265 320.2 2035.0 0.284 312.6 2036.0 0.301 305.9 2037.0 0.314 299.9 2038.0 0.325 294.3