Galaxy · Elliptical
UMa I
UMa I is a galaxy in the direction of the constellation Ursa Major, 326,200 light-years away.
| Type | Elliptical |
|---|---|
| Constellation | Ursa Major |
| Distance | 326,200 light-years (100.0 kpc) |
| Diameter | 1,631 light-years · 0.019 × the Milky Way |
| Absolute magnitude | magnitude −5.40 |
| Apparent magnitude | magnitude 14.60 |
| Luminosity | 6.3 × 10⁻⁷ × the Milky Way |
| Right ascension (J2000) | 10h 34m 52.8s |
| Declination (J2000) | +51° 55′ 12″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.60. Visible from the whole Northern Hemisphere and south to latitude 38° S. North of latitude 38° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 326 thousand years ago. At that time our ancestors were using stone tools; Homo sapiens did not exist yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.8 billion years.