My plan was to observe and estimate the apparent magnitude of the Moon during totality of the June 2011 lunar eclipse, but the clouds rolled in at the exact moment, so I couldn't make any useful estimates. What was the apparent magnitude?
According to NASA on this page, the penumbral magnitude was 2.6868 and the umbral magnitude was 1.6998. I was guessing that that meant magnitudes/arcsec, but the numbers don't make sense to me, whether eclipse magnitudes are listed as actual brightness or change in magnitude. Shouldn't the umbral magnitude be the larger number in either case?
Thank you for the answers! I just received an email from Dr. Richard Keen, turns out the visual magnitude of the eclipse from observers using naked eye, reversed binoculars, and photometry averaged -0.3 and the Danjon L values ranged from 0 to 1.5.