- Stars with a name
- Propus
Propus
η Geminorum
Propus is a red giant, in the constellation Gemini. The light you see from it tonight left it around 1641.
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, November, and December.
Visible to the naked eye away from the brightest lights. Apparent magnitude 3.31.
What it’s like
It gives off 574 times as much light as the Sun.
Its surface is at about 3,600 degrees.
It is 384.6 light years away: 3639 trillion kilometres.