Galaxy · Lenticular
NGC 5791
NGC 5791 is a galaxy in the direction of the constellation Libra, 156.1 million light-years away.
| Type | Lenticular |
|---|---|
| Constellation | Libra |
| Distance | 156.1 million light-years (47.86 Mpc) |
| Diameter | 129,400 light-years · 1.5 × the Milky Way |
| Absolute magnitude | magnitude −21.90 |
| Apparent magnitude | magnitude 11.50 |
| Luminosity | 2.5 × the Milky Way |
| Right ascension (J2000) | 14h 58m 46.2s |
| Declination (J2000) | −19° 16′ 01″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.50. Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° S 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 156 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 2,769.1 billion years.