Galaxy · Elliptical
And XX
And XX is a galaxy in the direction of the constellation Andromeda, 2.61 million light-years away.
| Type | Elliptical |
|---|---|
| Constellation | Andromeda |
| Distance | 2.61 million light-years (800.0 kpc) |
| Diameter | 652.3 light-years · 0.0075 × the Milky Way |
| Absolute magnitude | magnitude −6.40 |
| Apparent magnitude | magnitude 18.12 |
| Luminosity | 1.6 × 10⁻⁶ × the Milky Way |
| Right ascension (J2000) | 0h 07m 30.7s |
| Declination (J2000) | +35° 07′ 56″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.12. Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 2.6 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 46.3 billion years.