Galaxy · Irregular
HIJASS J1021+6842
HIJASS J1021+6842 is a galaxy in the direction of the constellation Ursa Major, 12.1 million light-years away.
| Type | Irregular |
|---|---|
| Constellation | Ursa Major |
| Distance | 12.1 million light-years (3.70 Mpc) |
| Diameter | 3,262 light-years · 0.037 × the Milky Way |
| Absolute magnitude | magnitude −12.60 |
| Apparent magnitude | magnitude 15.24 |
| Luminosity | 4.8 × 10⁻⁴ × the Milky Way |
| Right ascension (J2000) | 10h 21m 00.2s |
| Declination (J2000) | +68° 42′ 00″ |
| Source | Updated Nearby Galaxy Catalog (Karachentsev et al. 2013) |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.24. Visible from the whole Northern Hemisphere and south to latitude 21° S. North of latitude 21° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 12 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 214.1 billion years.