Galaxy · Spiral
NGC 4151
NGC 4151 is a galaxy in the direction of the constellation Canes Venatici, 46.3 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Canes Venatici |
| Distance | 46.3 million light-years (14.21 Mpc) |
| Diameter | 81,200 light-years · 0.93 × the Milky Way |
| Absolute magnitude | magnitude −20.49 |
| Apparent magnitude | magnitude 10.27 |
| Luminosity | 0.69 × the Milky Way |
| Right ascension (J2000) | 12h 10m 32.7s |
| Declination (J2000) | +39° 24′ 21″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.27. 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 46 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 822.2 billion years.