- Stars with a name
- Yed Prior
Yed Prior
δ Ophiuchi
Yed Prior is a red giant, in the constellation Ophiuchus. The light you see from it tonight left it around 1855.
Where to find it
From mid-northern latitudes, such as New York, Rome or Tokyo, it is best seen in the evening sky in May, June, July, and August.
Visible to the naked eye away from the brightest lights. Apparent magnitude 2.73.
What it’s like
It gives off 194 times as much light as the Sun.
Its surface is at about 3,700 degrees.
It is 171.1 light years away: 1619 trillion kilometres.