Galaxy · Spiral
HolmIV
HolmIV is a galaxy in the direction of the constellation Ursa Major, 23.5 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Ursa Major |
| Distance | 23.5 million light-years (7.21 Mpc) |
| Diameter | 26,900 light-years · 0.31 × the Milky Way |
| Absolute magnitude | magnitude −16.20 |
| Apparent magnitude | magnitude 13.09 |
| Luminosity | 0.013 × the Milky Way |
| Right ascension (J2000) | 13h 54m 45.1s |
| Declination (J2000) | +53° 54′ 17″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.09. Visible from the whole Northern Hemisphere and south to latitude 36° S. North of latitude 36° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 24 million years ago. At that time the dinosaurs were gone and mammals were diversifying; there was no human lineage yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 417.2 billion years.