Galaxy · Spiral
IC 1821 NED01
IC 1821 NED01 is a galaxy in the direction of the constellation Aries, 561.7 million light-years away.
| Type | Spiral (estimated) |
|---|---|
| Constellation | Aries |
| Distance | 561.7 million light-years (172.23 Mpc) |
| Diameter | 117,800 light-years · 1.3 × the Milky Way |
| Absolute magnitude | magnitude −21.67 |
| Apparent magnitude | magnitude 14.51 |
| Luminosity | 2 × the Milky Way |
| Right ascension (J2000) | 2h 36m 25.5s |
| Declination (J2000) | +13° 46′ 49″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.51. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 562 million years ago. At that time the Earth held only single-celled organisms and the first multicellular life. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9,964.9 billion years.