MDM Trouble Report for 2019 Dec 15 Telescope: 2.4m Observer(s): Thorstensen&students (Dartmouth) Instrument: OSMOS/B Problem(s) Encountered: Dome shutter is making a loud rhythmic racket near the top of its travel, louder than I remember. Telescope jumped in RA - tightened the drive bolts. Also, MIS required power cycling after the guide probe froze on two occasions. ------------------------------ Submitted on 2019 Dec 16 [7:06:44]