Galaxy · Spiral
NGC 100
NGC 100 is a galaxy in the direction of the constellation Pisces, 39.2 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Pisces |
| Distance | 39.2 million light-years (12.01 Mpc) |
| Diameter | 39,900 light-years · 0.46 × the Milky Way |
| Absolute magnitude | magnitude −16.96 |
| Apparent magnitude | magnitude 13.44 |
| Luminosity | 0.027 × the Milky Way |
| Right ascension (J2000) | 0h 24m 02.8s |
| Declination (J2000) | +16° 29′ 11″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.44. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° 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 39 million years ago. At that time the dinosaurs were gone and mammals were diversifying; there was no human lineage yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 694.9 billion years.