Zeta Ursae Majoris, 80 Ursae Majoris
Zeta UMa – ζ UMa – Mizar – Double star in Ursa Major
80 UMa – Alcor – Binary star in Ursa Major
Dedicated to my dear wife, Klári.
My ζ ‘zeta’ looks like a ξ ‘xi’ here, sorry for that. I’m sure I’ll make another sketch of this trio some day.
| Objects | Zeta Ursae Majoris, 80 Ursae Majoris |
|---|---|
| Observed at | Dunaharaszti, HU, 2025-07-12 |
| NELM | ~ 4.0 |
| Aperture | 127 mm |
| Magnification | 47x |
| FOV | 1.1° |
Object data
| Objects | Zeta-1 Ursae Majoris | Zeta-2 Ursae Majoris | 80 Ursae Majoris |
|---|---|---|---|
| Fetched as | HD 116656 | HD 116657 | HD 116842 |
| Desc. | Main sequence main sequence star † | Main sequence star † | Binary of main sequence stars |
| RA | 13h 23m 55s † | 13h 23m 56s † | 13h 25m 13s † |
| Dec | 54° 55’ 31” † | 54° 55’ 14” † | 54° 59’ 17” † |
| Magnitude | 2.23 | 3.88 | 3.99 |
| Spectral class | A2V † | A1 m † | A5V SB + M3-4 |
† fetched from astronomyapi.com
