Galaxy · Elliptical
NGC 7457
NGC 7457 is a galaxy in the direction of the constellation Pegasus, 37.8 million light-years away.
| Type | Elliptical |
|---|---|
| Constellation | Pegasus |
| Distance | 37.8 million light-years (11.60 Mpc) |
| Diameter | 56,900 light-years · 0.65 × the Milky Way |
| Absolute magnitude | magnitude −18.96 |
| Apparent magnitude | magnitude 11.36 |
| Luminosity | 0.17 × the Milky Way |
| Right ascension (J2000) | 23h 00m 60.0s |
| Declination (J2000) | +30° 08′ 41″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.36. Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° 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 38 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 671.2 billion years.