Engineer Robert, thank you for your consideration of my request. Yes, indeed the long interval marked by many studies (theoretical and experimental) of lunar mineralogy, but without any reference to the phenomenon I have recalled, raises uncertainty in my simple studies of lunar eclipse photometry. I have photometric observations of eclipses for more than an entire solar cycle, and it seems very strange that such a conspicuous phenomenon does not generate interest.
British Astronomical Association
Supporting amateur astronomers since 1890