Galaxy · Irregular
DDO 99
DDO 99 is a galaxy in the direction of the constellation Ursa Major, 8.61 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Ursa Major |
| Distance | 8.61 million light-years (2.64 Mpc) |
| Diameter | 10,600 light-years · 0.12 × the Milky Way |
| Absolute magnitude | magnitude −14.10 |
| Apparent magnitude | magnitude 13.01 |
| Luminosity | 0.0019 × the Milky Way |
| Right ascension (J2000) | 11h 50m 53.0s |
| Declination (J2000) | +38° 52′ 50″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.01. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 8.6 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 152.7 billion years.