Galaxy · Spiral
NGC 7794
NGC 7794 is a galaxy in the direction of the constellation Pegasus, 246.0 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Pegasus |
| Distance | 246.0 million light-years (75.43 Mpc) |
| Diameter | 99,400 light-years · 1.1 × the Milky Way |
| Absolute magnitude | magnitude −21.49 |
| Apparent magnitude | magnitude 12.90 |
| Luminosity | 1.7 × the Milky Way |
| Right ascension (J2000) | 23h 58m 34.1s |
| Declination (J2000) | +10° 43′ 42″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.90. Visible from the whole Northern Hemisphere and south to latitude 79° S. North of latitude 79° N 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 246 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 4,364.2 billion years.