Remarks: 4 Apr 05: The value of the mass, resting on planet models, is
very uncertain and different with different models.
References:
NEUHÄUSER R., GUENTHER E., WUCHTERL G., MUGRAUER M., BEDALOV A. &
HAUSCHILDT P., 2005
Evidence for a co-moving sub-stellar companion to GQ Lup. Astron. & Astrophys., 435, L13 paper