Proposal #142

While there are a few secondary eclipses in the AID, the primary eclipse for NU UMa is not recently recorded in the AAVSO AID.
The star is not available at my location.
I would like to use a suitable BSM at a suitable longitude. Advise if this is possible, given your telescope locations. It is fairly northerly at +58 degrees.
Ideally, it will be a two to four-hour time-series observation to catch the primary minimum at the UTC "Mid" time listed in the ephemeris.
Requesting an image per minute using only the V filter.

Exposure durations per your best judgment given your new cameras and the bright (~6 mag) stars in the FOV. NU UMa is about 9.5 .The comps are approximately magnitude 12.

Coordinates:
There are a couple of 6th magnitude stars nearby. The image could be offset ~2 minutes to the East to avoid the bright star at the west side of the 1.8 degree FOV. The RA would then be 10 55 01.05 . No adjustment in declination is possible to avoid very bright stars. So the requested Coordinates are: RA 10 55 01.05 , DEC +57 42 08.0 .

Images should be uploaded to VPHOT. I often have 300 to 400 3-MB images in-process on VPHOT. If there is a limit to VPHOT, you may want to alert me to delete my files before you upload.
Photometry will be uploaded to the AAVSO database.

Date of observation:
Eclipses happen only when they happen.
Please choose a date from the VSX ephemeris shown here, time series centered on the mid point of the eclipse and at least a half hour before and a half hour past the mid point. The entire eclipse duration is roughly four hours and the request is to capture as much of one eclipse as possible.

VSX Ephemeris:
Epoch Start Mid End
2459034.983 04 Jul 2020 09:36 04 Jul 2020 11:35 04 Jul 2020 13:33

2459040.490 09 Jul 2020 21:47 09 Jul 2020 23:46 10 Jul 2020 01:44

2459045.998 15 Jul 2020 09:58 15 Jul 2020 11:56 15 Jul 2020 13:55

2459051.506 20 Jul 2020 22:08 21 Jul 2020 00:07 21 Jul 2020 02:06

2459057.013 26 Jul 2020 10:19 26 Jul 2020 12:18 26 Jul 2020 14:17

2459062.521 31 Jul 2020 22:30 01 Aug 2020 00:29 01 Aug 2020 02:28

Ray Tomlin
TRE
7tomlin@gmail.com