Galaxy · Spiral
NGC 3938
NGC 3938 is a galaxy in the direction of the constellation Ursa Major, 37.7 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Ursa Major |
| Distance | 37.7 million light-years (11.56 Mpc) |
| Diameter | 69,500 light-years · 0.79 × the Milky Way |
| Absolute magnitude | magnitude −19.61 |
| Apparent magnitude | magnitude 10.70 |
| Luminosity | 0.3 × the Milky Way |
| Right ascension (J2000) | 11h 52m 49.5s |
| Declination (J2000) | +44° 07′ 15″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.70. Visible from the whole Northern Hemisphere and south to latitude 46° S. North of latitude 46° 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 38 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 668.8 billion years.