Galaxy · Spiral
NGC 4145
NGC 4145 is a galaxy in the direction of the constellation Canes Venatici, 47.0 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Canes Venatici |
| Distance | 47.0 million light-years (14.41 Mpc) |
| Diameter | 66,200 light-years · 0.76 × the Milky Way |
| Absolute magnitude | magnitude −19.42 |
| Apparent magnitude | magnitude 11.37 |
| Luminosity | 0.26 × the Milky Way |
| Right ascension (J2000) | 12h 10m 01.5s |
| Declination (J2000) | +39° 53′ 02″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.37. Visible from the whole Northern Hemisphere and south to latitude 50° S. North of latitude 50° 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 47 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 833.7 billion years.