Galaxy · Irregular
DDO 154
DDO 154 is a galaxy in the direction of the constellation Coma Berenices, 13.2 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Coma Berenices |
| Distance | 13.2 million light-years (4.04 Mpc) |
| Diameter | 8,154 light-years · 0.093 × the Milky Way |
| Absolute magnitude | magnitude −14.60 |
| Apparent magnitude | magnitude 13.43 |
| Luminosity | 0.003 × the Milky Way |
| Right ascension (J2000) | 12h 54m 05.2s |
| Declination (J2000) | +27° 08′ 55″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.43. Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 13 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 233.7 billion years.