Galaxy · Spiral
NGC 7820
NGC 7820 is a galaxy in the direction of the constellation Pisces, 142.2 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Pisces |
| Distance | 142.2 million light-years (43.61 Mpc) |
| Diameter | 67,300 light-years · 0.77 × the Milky Way |
| Absolute magnitude | magnitude −20.70 |
| Apparent magnitude | magnitude 12.50 |
| Luminosity | 0.83 × the Milky Way |
| Right ascension (J2000) | 0h 04m 30.8s |
| Declination (J2000) | +5° 12′ 01″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.50. Visible from the whole Northern Hemisphere and south to latitude 85° S. 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 142 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 2,523.2 billion years.