Galaxy · Irregular
KDG104
KDG104 is a galaxy in the direction of the constellation Coma Berenices, 30.7 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Coma Berenices |
| Distance | 30.7 million light-years (9.40 Mpc) |
| Diameter | 7,371 light-years · 0.084 × the Milky Way |
| Absolute magnitude | magnitude −13.70 |
| Apparent magnitude | magnitude 16.17 |
| Luminosity | 0.0013 × the Milky Way |
| Right ascension (J2000) | 12h 21m 27.9s |
| Declination (J2000) | +15° 01′ 28″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 16.17. Visible from the whole Northern Hemisphere and south to latitude 75° S. North of latitude 75° 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 31 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 543.9 billion years.