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I happened to be awake, so I turned the dome lamp on, looked at the telescope, and found that it was not pointing at zenith. I put the telescope to zenith by eye, zeroed the tilt meters and zeroed the coordinates. It should be ready for observing
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<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I happened to be awake, so I turned the dome lamp on, looked at the telescope,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">and found that it was not pointing at zenith.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I put the telescope to zenith by eye, zeroed the tilt meters and zeroed the coordinates. It should be ready</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> for observing again. Possibly a fine adjustment of the pointing will be needed.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">-Jules-</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 1, 2022 at 3:01 AM obs13m--- via ASTRO-mdm-report <<a href="mailto:astro-mdm-report@lists.osu.edu">astro-mdm-report@lists.osu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">!-------------------------------------------------------------------|<br>
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<br>
MDM Observatory 1.3m Telescope Observing Report for 2022 Mar 31<br>
<br>
Observer(s): Qiong Li<br>
Institution(s): UMICH<br>
<br>
Instrument: Nellie<br>
<br>
Worked for 6 hours (first half of the night)<br>
Conditions were Photometric most of the night.<br>
No equipment or software problems were encountered.<br>
<br>
Seeing and Weather:<br>
Beg: Clear, Winds Calm<br>
Mid: Clear, Winds Calm<br>
End: Clear, Winds Calm<br>
<br>
Observing Summary:<br>
<br>
We lost the pointing at the beginning of the night observation. The telescope position ('MDM1.3m Control panel') is not same as the target's position. I tested another target, and it still has RA_OFFSET~1m18s, DEC_OFFSET~7'0''. <br>
Then I point the telescope to the zenith, without tracking and enter:<br>
zero ra=(LST) dec=31:57:12 equinox=2022<br>
It still doesn't work. Finally, I found the value for tilt sensor motion cannot change when I move the hand paddle. It is always at [-491,+458] at zenith. Next, I tried the offset (in the telescope control panel). The value for motion still didn't change. We close the dome at 12:00 am LST.<br>
<br>
------------------------------<br>
<br>
Submitted on 2022 Apr 1 [0:00:32]<br>
<br>
Observer Contact Email: <a href="mailto:xqli@umich.edu" target="_blank">xqli@umich.edu</a> (Note: will not appear in versions of the report archived online)<br>
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