Galaxy · Barred spiral
NGC 7733
NGC 7733 is a galaxy in the direction of the constellation Tucana, 473.8 million light-years away.
| Type | Barred spiral |
|---|---|
| Constellation | Tucana |
| Distance | 473.8 million light-years (145.26 Mpc) |
| Diameter | 247,300 light-years · 2.8 × the Milky Way |
| Absolute magnitude | magnitude −21.99 |
| Apparent magnitude | magnitude 13.82 |
| Luminosity | 2.7 × the Milky Way |
| Right ascension (J2000) | 23h 42m 33.0s |
| Declination (J2000) | −65° 57′ 23″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.82. Visible from the whole Southern Hemisphere and north to latitude 24° N. South of latitude 24° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 474 million years ago. At that time complex animals were spreading through the seas and over the land; there were no dinosaurs yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8,404.4 billion years.