Galaxy · Lenticular
NGC 7123
NGC 7123 is a galaxy in the direction of the constellation Indus, 172.3 million light-years away.
| Type | Lenticular |
|---|---|
| Constellation | Indus |
| Distance | 172.3 million light-years (52.83 Mpc) |
| Diameter | 159,200 light-years · 1.8 × the Milky Way |
| Absolute magnitude | magnitude −22.05 |
| Apparent magnitude | magnitude 11.56 |
| Luminosity | 2.9 × the Milky Way |
| Right ascension (J2000) | 21h 50m 46.6s |
| Declination (J2000) | −70° 20′ 03″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.56. Visible from the whole Southern Hemisphere and north to latitude 20° N. South of latitude 20° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 172 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 3,056.6 billion years.