Galaxy · Irregular
Cas1
Cas1 is a galaxy in the direction of the constellation Cassiopeia, 10.8 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Cassiopeia |
| Distance | 10.8 million light-years (3.30 Mpc) |
| Diameter | 17,600 light-years · 0.2 × the Milky Way |
| Absolute magnitude | magnitude −17.30 |
| Apparent magnitude | magnitude 10.29 |
| Luminosity | 0.036 × the Milky Way |
| Right ascension (J2000) | 2h 06m 07.9s |
| Declination (J2000) | +69° 00′ 36″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.29. Visible from the whole Northern Hemisphere and south to latitude 21° S. North of latitude 21° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 11 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 190.9 billion years.