Starshot

What are the conditions for these kinds of experiment, just occultation?

Yeah, I would always recommend looking at Jupiter and Saturn for people trying out amatuer astronomy. Craters on the moon are also cool even with loads of light pollution. Happy stargazing OP

Mars Reappearance: 1st sighting 05:57:11:09 Fully Detached 05:57:36:71 Fully detached is probably the more accurate of these observations. Will DM you the location

Mars Occultation from Derbyshire: 1st contact 04:57:02:82 UTC Didn't get full disappearance, sadly. Should be able to get reappearance in about half an hour.

AtomicClock: NTP Time has an settings option where tapping anywhere on the screen freezes clock on click, so can click on event and then screenshot or write down the time when screen frozen.

Brit with telescope here, I'm willing to give it a go. Current weather forecast is 15% cloud at that time, so may not be possible but I'm up for trying.