MDM Observatory 1.3m Telescope Observer's Report for 2000 Dec 21 Observer(s): Soo-Chang Rey(1) & Eon-Chang Sung (2) Institution(s): 1) CSA, Yonsei U. 2) KAO Instrument: Echelle 2K CCD Worked for 11 hours (all night) Conditions were Non-Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 1.5 arcsec, Cirrus, Winds Calm Mid: Seeing 2.0 arcsec, Cirrus, Winds Calm End: Seeing 1.5 arcsec, Cirrus, Winds Calm Observing Summary: The telescope and Echelle CCD Camera worked well. Non photometric. Cirus, sometimes thin patch passed. About 40 object images were exposed. 1800sec exposed I-band images show distint interference patterns. I-band images should be corrected. ------------------------------ Submitted on 2000 Dec 22 [5:14:00]