Galaxy · Irregular
AGC748778
AGC748778 is a galaxy in the direction of the constellation Pegasus, 17.6 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Pegasus |
| Distance | 17.6 million light-years (5.40 Mpc) |
| Diameter | 1,761 light-years · 0.02 × the Milky Way |
| Absolute magnitude | magnitude −10.60 |
| Apparent magnitude | magnitude 18.06 |
| Luminosity | 7.6 × 10⁻⁵ × the Milky Way |
| Right ascension (J2000) | 0h 06m 34.4s |
| Declination (J2000) | +15° 30′ 39″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.06. 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 18 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 312.4 billion years.