Star profile

Phi Boötis

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

What is Phi Boötis

Phi Boötis is a yellow star about 170 light-years away in Boötes, the figure that herds the bears around the pole. Of G class like the Sun but already in its giant phase, its warm light keeps company with Arcturus —the fourth-brightest star in the sky— as a discreet satellite. It is close, in stellar terms, and that lends it a clarity its mere magnitude does not suggest.

Where it is and when to see it

Phi 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: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.

Find it on the sky map

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The signature wall

Stelvia's sky works like a signature wall: anyone can leave their name and a message on a real star, and that signature goes up on the map for everyone to read. Signing is free.

A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works

If you don't have an account yet, we'll ask for an email to confirm it's you: we send you a link and that's it, no password.

Write my signature

A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.

Astronomical data for Phi Boötis

Constellation: Boötes
Apparent magnitude: 5.25
Distance: 169.7 light years
Coordinates (J2000): RA 234.457° · Dec 40.353°
Catalogue: HIP 76534 · HD 139641

A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.

Other stars in Boötes

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

See all 88 stars in Boötes