- Stars with a name
- Alterf
Alterf
λ Leonis
Alterf is an orange giant, in the constellation Leo. The light you see from it tonight left it around 1697.
Where to find it
From mid-northern latitudes, such as New York, Rome or Tokyo, it is best seen in the evening sky in January, February, March, April, and May.
Visible to the naked eye away from the brightest lights. Apparent magnitude 4.32.
What it’s like
It gives off 166 times as much light as the Sun.
Its surface temperature is about 3,500 degrees Celsius.
It is 329.1 light years away: 3114 trillion kilometres.