MDM Observatory 2.4m Telescope Observing Report for 2019 Sep 16 Observer(s): Rupert Institution(s): MDM Instrument: OSMOS/B Worked for 7.5 hours (most of the night) Conditions were Mixed most of the night. No equipment or software problems were encountered. Seeing and Weather: High Humidity from start until 9:30. Beg: Seeing 2.3 arcsec, Cirrus, Winds Calm Mid: Seeing 1.2 arcsec, Clear, Winds Calm End: Seeing 1.2 arcsec, Clear, Winds Light & Variable Observing Summary: Thunderstorms rolled over the mountain in the late afternoon. They continued through sunset. Didn't open until 9:30 after the humidity had dropped. Seeing wasn't very good at first, but it settled down after an hour or so. All was well after that. ------------------------------ Submitted on 2019 Sep 17 [5:06:38]