MDM Observatory 1.3m Telescope Observing Report for 2020 Feb 18 Observer(s): Yuming Fu Institution(s): PKU Instrument: CCDS No Observing (see comments below) Conditions were Mixed most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Clouds from 23:30 until 06:30. Observing Summary: In-dome calibration from 17:50 to 18:30. Dome opened at 18:45. I lost pointing of the telescope and could not identify any object soon after the obsevation began. I changed a few targets but still failed. Then I attempted to zero the telescope according to Edmund's MDM 1.3m manual. I used home button in the TCS panel to home the telescope and got error where m_ha not homed . This error was solved after I homed ha axis and dec axis separately. Later I followed the command for zero telescope from the mcgraw checklist (http://mdm.kpno.noao.edu/mcgraw-checklist.html). While it worked at last, I could not continue the obsevation due to the clouds. Dome closed at 04:15. The checklist turned out to be very important. And I might have avoided these troubles if I had followed it carefully. (Check the pointing/position of the telescope before the observation.) ------------------------------ Submitted on 2020 Feb 19 [7:16:50]