Galaxy · Barred spiral
IC 4582
IC 4582 is a galaxy in the direction of the constellation Corona Borealis, 99.9 million light-years away.
| Type | Barred spiral |
|---|---|
| Constellation | Corona Borealis |
| Distance | 99.9 million light-years (30.64 Mpc) |
| Diameter | 39,500 light-years · 0.45 × the Milky Way |
| Absolute magnitude | magnitude −18.97 |
| Apparent magnitude | magnitude 13.46 |
| Luminosity | 0.17 × the Milky Way |
| Right ascension (J2000) | 15h 45m 39.4s |
| Declination (J2000) | +28° 05′ 19″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.46. Visible from the whole Northern Hemisphere and south to latitude 62° S. North of latitude 62° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 100 million years ago. At that time dinosaurs ruled the Earth. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1,772.8 billion years.