Got another low-res spectrum of Eta Carinae tonight, a real battle against cloud banks both drifting through and making-&-breaking. Spectrum from 22 July (top) included, both presented as bars at full camera resolution. 'Spears' included at bottom. Canon 650D & 200mm lens, SA100 grating, 20 x 9 sec (28th), 13 x 9 sec (22nd), ISO 6400, F/5.6, L image size. Scale is 0.22nm/pixel, or 2.2Å/pixel.
Forecast for the next week doesn't look very promising...
Cheers -