Zeta Ursae Majoris
Scientific overview
Zeta Ursae Majoris is a main-sequence star in the constellation Ursa Major (Ursae Majoris), lying about 78.78 light-years from Earth.
Class A. White stars with strong hydrogen lines. Many of the brightest stars in the sky are class A. Such stars have surface temperatures around 7,500–10,000 K and appear white to the eye.
Physical properties
| Spectral type | A1 m |
| Apparent magnitude | 3.95 |
| Absolute magnitude | 2.04 |
| Luminosity (Sun = 1) | 13.366 |
| Colour index (B−V) | 0.13 |
| Distance | 78.78 ly (24.15 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
Evolution
A main-sequence star fuses hydrogen into helium in its core. It will remain on the main sequence for most of its life before evolving into a giant.
Location in the sky
Knowledge connections
- In constellationUrsa Major
Related stars in Ursa Major
Sources
The primary and reference sources this topic draws on.
- HYG DatabaseHYG Database (Hipparcos + Yale Bright Star + Gliese), by D. Nash / astronexus
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
- HipparcosESA Hipparcos space astrometry mission
High-precision parallax, magnitude, and position for ~118,000 stars.