π Herculis


Pi Herculis is a reddish star with a magnitude of 3.2. The star forms the northeastern corner of the 'keystone' of the constellation, the central quadrangle.

It's easiest to find pi first with the naked eye -- it's midway between Vega and Alphecca (alpha Coronae Borealis).

The binocular view of pi reveals an interesting asterism which is a handy point of repair should one become lost amongst the other stars in Hercules: binoculars.

From pi you can find the other corners of the 'keystone', the lopsided square that forms the centre of the constellation. To the southwest a little over a binocular field are zeta and epsilon, while to the east-northeast of pi barely one binocular field (that is, just out of the same field with pi) is eta.

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1999-2014 by Richard Dibon-Smith.