Meet a star / Ophiuchus

Wolf 1061

Wolf 1061 is a red star, among the coolest, in the constellation Ophiuchus.

A drawing in the star's own colour, worked out from its measured colour index. It is not a photograph.

How far

14 light years

The light you see from Wolf 1061 tonight set off about 14 years ago. Everything we know about it is that much out of date.

How bright

0.00 of a Sun

It gives out one 680th of the Sun's visible light. It is too faint to see without a telescope.

Astronomers put its brightness in our sky at magnitude 10.10. Smaller numbers are brighter, and the faintest stars the eye can see are about 6.

How hot

About 3,600 K

That is the temperature of its surface, worked out from its colour, so it is a guide and not a measurement. It could be out by a few hundred degrees. The Sun's is 5,772 K. Hotter stars are bluer and cooler stars are redder, the same way a poker in a fire goes from red to white.

Wolf 1061The Sun

Its names

Its own name
Wolf 1061
Hipparcos catalogue
HIP 80824
Spectral type
M4

Where this comes from

Distance, brightness, colour and spectral type are from the HYG star database, version 4.4, by David Nash, shared under a Creative Commons Attribution-ShareAlike 4.0 licence. Its distances are those measured by the Hipparcos satellite. The temperature is worked out here from the colour with the formula of Ballesteros (2012), and the words are written for this site.

To read more: Colour and brightness, How stars live and die, Measuring distance.