Star profile

31 Boötis

3D likeness based on its real data · class G · ~5,500 K

What is 31 Boötis

31 Boötis is a yellow giant 537 light-years away, swollen to 23 times the Sun's radius and pouring out nearly 275 times its light. Its G8 III type sits exactly where our Sun will stand in some five billion years: the same hue, the same calm transition into stellar old age. It glows quietly on the western flank of the Herdsman at magnitude 4.86, an aged, amplified echo of our own star.

Where it is and when to see it

31 Boötis lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is April, when it culminates around midnight.

From London it culminates about 47° above the horizon.
From New York it culminates about 57° above the horizon.
From Sydney it culminates about 48° above the horizon.

It can be seen from anywhere north of 82° S.

It ranks no. 28 in brightness among the 88 stars of Boötes in our catalogue. To find it, start from Arcturus, the brightest: it lies about 13° away (a fist at arm's length covers about 10°).

The light you see today left it about 540 years ago.

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Astronomical data for 31 Boötis

Constellation: Boötes
Apparent magnitude: 4.86
Distance: 537.4 light years
Coordinates (J2000): RA 220.411° · Dec 8.162°
Catalogue: HIP 71832 · HD 129312

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Other stars in Boötes

Boötes has 88 stars in Stelvia's catalogue. Here are a few of them.

See all 88 stars in Boötes