Galaxy · Irregular
NGC 523
NGC 523 is a galaxy in the direction of the constellation Andromeda, 221.7 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Andromeda |
| Distance | 221.7 million light-years (67.97 Mpc) |
| Diameter | 133,500 light-years · 1.5 × the Milky Way |
| Absolute magnitude | magnitude −22.17 |
| Apparent magnitude | magnitude 11.99 |
| Luminosity | 3.2 × the Milky Way |
| Right ascension (J2000) | 1h 25m 20.8s |
| Declination (J2000) | +34° 01′ 30″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.99. Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 222 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 3,932.6 billion years.