Galaxy · Barred spiral
NGC 2820
NGC 2820 is a galaxy in the direction of the constellation Ursa Major, 73.4 million light-years away.
| Type | Barred spiral |
|---|---|
| Constellation | Ursa Major |
| Distance | 73.4 million light-years (22.49 Mpc) |
| Diameter | 44,000 light-years · 0.5 × the Milky Way |
| Absolute magnitude | magnitude −18.96 |
| Apparent magnitude | magnitude 12.80 |
| Luminosity | 0.17 × the Milky Way |
| Right ascension (J2000) | 9h 21m 45.6s |
| Declination (J2000) | +64° 15′ 28″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.80. Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 73 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 1,301.2 billion years.