Hesiodus crater ray phenomenon

[dweller25]

Here are my drawings of Hesiodus an hour apart showing the increasing ray phenomenon.

It was great to get out with the scope again after weeks of bad weather.

Big thanks to @Nyctimene for flagging this up 🙂👍

 

[John]

Nice sketches David 👍

I wonder what the view would be like from the surface at that time, looking across the crater floor towards the "gap" ? 🙂 

Hesiodus A is worth a look when it's floor is illuminated - it's one of the best "double walled" craters to observe:

 

Edited April 18 by John

[Stu]

2 hours ago, dweller25 said:

Here are my drawings of Hesiodus an hour apart showing the increasing ray phenomenon.

It was great to get out with the scope again after weeks of bad weather.

Big thanks to @Nyctimene for flagging this up 🙂👍

 

Very nice! I caught it looking similar to your 20.40 sketch.

[Nyctimene]

Glad, that so many members were lucky enough weather-wise to spot the ray! Was out with the 5.1" Heritage early enough to confirm, that the phenomenon had not started at 20.45 CEST. Fifteen minutes later, the clouds had left the moon invisible, and rain was starting. Ok.; I have seen the ray three times up to now, and will wait patiently for the June 15th occasion.

I didn't manage the reverse phenomenon, the Pitatus ray, up to now. The times for observing are less convenient, during the morning hours (waning moon!), but it seems worthwhile to get up early; have a look:

(c) Frank Mc Cabe; https://www.cloudynights.com/topic/554510-craters-pitatus-and-hesodius-during-lunar-sunset/

http://www.lunar-occultations.com/rlo/rays/animation/Pitatus.gif

 

Next occasion will be May, 2nd, 03h 26min; the moon will be very low, so you'll need a free horizon to the SE. More data here:

http://www.lunar-occultations.com/rlo/rays/pitatusp.htm

Stephan

Edited April 18 by Nyctimene
data corrected