this LCD chart assumes the normal straight-through mounting w/ f.3.3
We may have to use the 0.5x reducer nose piece and 2" diagonal +1.25" insert to get this, and shove 8SE all the way forward in the fork mount.
This event is of decent rank, and apparently an extremely red star. The C2A magnitude is 13.9, but the OWcloud data shows it as "11.2" and R=9.7, B=14.8 (!!). So, it will be interesting. The duration is 1.1s and the other challenge is that it is at 86 degree altitude. It will pay to tilt the legs as much as you can get away with to avoid bizarre tracking troubles as the field rotation will be rapid and variable. You'll need to use two tracking stars widely separated and make sure stars are properly placed even for strong field rotation. Might have to mount the 0.5x reducer instead of the f/3.3 or f/6.3 reducers to get access and avoid the mount hitting the gear.
If W watec magnitude band is halfway between V and R magnitues, then W=10.6 magnitude. The target is 86 degrees up and due north of the zenith at event time, and is 83 degrees up and at Az=49 half hour before the event. So there will be 50 degrees of field rotation during the half hour before the event. Realize then that the eyepiece view may be rotated significantly from what you see below, which is for 1/2 hr before the event.
|
this LCD chart assumes the normal straight-through mounting w/ f.3.3 |
|
We may have to use the 0.5x reducer nose piece and 2" diagonal +1.25" insert to get this, and shove 8SE all the way forward in the fork mount. |
|
I drove Kirk to the small commercial spot just before Summit on Hwy 17, then continued on to Mtn Charlie road and set up next to the Mtn Charlie monument. Some cirrus came in, but didn't seem to harm the light curves. The odds for me were nominally high, but the RUWE was over the limit, and in fact, I had a miss. Setting at 4x.
Long 121 59 07.64
Lat 37 08 39.20
elev 1902 ft
 |
 |
 |
The drop should have been to zero; nothing to support that here. "Miss" was reported. |
 |
 |
 |
The Mtn Charlie monument. His toll road taken by the Santa Cruz Board of Sup's for.... $600?! What kinda deal is THAT? Can you imagine what it would cost to build that road today? |
Got a miss.
Observed from the corner of the red building at the commercial spot south of Summit by about a mile or mile and a half. A rather bizarre situation is that the brightness of the target on Kirk's screen is much dimmer than on my screen, both in relatio to the stars we both recorded which were not target stars. On Kirk's screen, his target looks about 13.7 magnitude, while on mine it looks more like 12.0, judging by the V magnitudes of the stars on C2A and shown on our PyMovie 'finders'. I used the Fourier finder method. A mystery why the star looked so much brighter on my telescope than his.
Reductions showed a miss.
 |
 |
 |
 |
