Luminosity-colour relations for red clump stars.

We calibrated the absolute magnitudes M, M, $M_{K_{s}}$ and M of red clump stars in terms of colours. M and M are strongly dependent on colour, while the dependence of M and $M_{K_{s}}$ on colour is rather weak. The calibration of the absolute magnitudes M and $M_{K_{s}}$ is tested on 101 RC stars in the field SA 141. The Galactic model parameters estimated with this sample are in good agreement with earlier studies. [ABSTRACT FROM AUTHOR]