Galaxy · Irregular
HIPASS J0457-42
HIPASS J0457-42 is a galaxy in the direction of the constellation Caelum, 23.5 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Caelum |
| Distance | 23.5 million light-years (7.20 Mpc) |
| Diameter | 9,393 light-years · 0.11 × the Milky Way |
| Absolute magnitude | magnitude −15.50 |
| Apparent magnitude | magnitude 13.79 |
| Luminosity | 0.0069 × the Milky Way |
| Right ascension (J2000) | 4h 56m 58.7s |
| Declination (J2000) | −42° 48′ 14″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.79. Visible from the whole Southern Hemisphere and north to latitude 47° N. South of latitude 47° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 23 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 416.6 billion years.