Visual Magnitude of the BlueWalker 3 Satellite by Anthony Mallama et al.  on Wednesday 30 November
Observations have been carried out in order to assess the optical
characteristics of the BlueWalker 3 spacecraft which is the prototype for a new
satellite constellation. The illumination phase function has been determined
and evaluated. The average visual magnitude when seen overhead at the beginning
or ending of astronomical twilight is found to be +1.4.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.09811v2