Galaxy · Spiral
DDO 47
DDO 47 is a galaxy in the direction of the constellation Gemini, 26.3 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Gemini |
| Distance | 26.3 million light-years (8.05 Mpc) |
| Diameter | 36,600 light-years · 0.42 × the Milky Way |
| Absolute magnitude | magnitude −16.70 |
| Apparent magnitude | magnitude 12.83 |
| Luminosity | 0.021 × the Milky Way |
| Right ascension (J2000) | 7h 41m 55.0s |
| Declination (J2000) | +16° 48′ 02″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.83. Visible from the whole Northern Hemisphere and south to latitude 73° S. North of latitude 73° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 26 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 465.8 billion years.