Galaxy · Irregular
BTS157
BTS157 is a galaxy in the direction of the constellation Canes Venatici, 28.8 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Canes Venatici |
| Distance | 28.8 million light-years (8.83 Mpc) |
| Diameter | 4,501 light-years · 0.051 × the Milky Way |
| Absolute magnitude | magnitude −13.00 |
| Apparent magnitude | magnitude 16.73 |
| Luminosity | 6.9 × 10⁻⁴ × the Milky Way |
| Right ascension (J2000) | 12h 51m 13.3s |
| Declination (J2000) | +47° 04′ 15″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 16.73. Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 29 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 510.9 billion years.