Galaxy · Elliptical
Segue 3
Segue 3 is a galaxy in the direction of the constellation Pegasus, 65,200 light-years away.
| Type | Elliptical |
|---|---|
| Constellation | Pegasus |
| Distance | 65,200 light-years (20.0 kpc) |
| Diameter | 65.2 light-years · 7.5 × 10⁻⁴ × the Milky Way |
| Absolute magnitude | magnitude −1.20 |
| Apparent magnitude | magnitude 15.31 |
| Luminosity | 1.3 × 10⁻⁸ × the Milky Way |
| Right ascension (J2000) | 21h 21m 31.0s |
| Declination (J2000) | +19° 07′ 02″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.31. Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 65 thousand years ago. At that time Homo sapiens was spreading out of Africa; there was no farming yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 billion years.