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Grant Privett
ParticipantAh, I see. A 20 min running average certainly helps.
Impressive. Noise level at the 8-10mmags level perhaps.
Grant Privett
ParticipantHas a humble webcam have the sensitivity and well depth required?
Grant Privett
ParticipantI imagine a C14 was rather cheaper than the Gemini though….
Grant Privett
ParticipantThis seemed appropriately timed: https://www.xkcd.com/2202/
Grant Privett
ParticipantAs of this afternoon its working again. Odd.
Grant Privett
ParticipantMany thanks. A good read.
Especially liked the NTP server article. Very tempting.
Grant Privett
ParticipantWas it cellulose acetate or cellulose nitrate (nitrocellulose) that was the problem? Nitrocellulose was quite widely used in the early years of the 1900s.
I imagine cellulose acetate can burn but, nitrocellulose is also known as gun cotton and burns with vigour!
Without the addition of carbamite or another stabiliser, the decomposition products of nitrocellulose accumulate quite quickly making film go brownish – so colour film would really suffer.
Didnt some types of billiard ball made from nitrocellulose during the 20’s have a similar issue? I have a vague memory nitrocellulose was used as a coating for playing cards as well at some point.
Grant Privett
ParticipantCommonly termed, crepuscular rays…..
Grant Privett
ParticipantMany thanks for your reply. Will speak soon.
Grant Privett
ParticipantClearly the definition has changed in recent years….
Grant Privett
ParticipantWe’re all doomed! 🙂
Grant Privett
ParticipantBrilliant. Really hadnt realised you just had to look 60 degrees in front or following the sun. That makes it pretty easy, get the sun’s position on ecliptic in RA/Dec, convert to ecliptic cooords, add 60 degrees and convert back to RA/Dec again. Sure I can find something in AstroPy to do most of that. I imagine that drops it nicely into the edge of the Zodiacal light.
Thanks again.
Grant Privett
ParticipantIs that 60 degrees as viewed from the sun or the earth?
Grant Privett
ParticipantIt was a nice, friendly and well organised conference. Some very interesting talks.
Shame its a bit expensive for amateurs to attend – but its not really aimed at us.
Grant Privett
ParticipantIf you have time to a few seconds plus RA and Dec I can have a look for you.
Grant Privett
ParticipantTheSkyX can certainly do it… but I am sure there are less expensive options.
Grant Privett
ParticipantCould you use USB/serial emulators?
Grant Privett
ParticipantLovely picture.
In Salisbury we watched the rain fall – a lot. 🙂
Grant Privett
ParticipantIn this context, how long is a “long time series”?
Grant Privett
ParticipantWatched for the 00:08 pass from here in Salisbury. A single 3rd mag satellite went through at about 0:08 but certainly nothing else brighter than 5th mag was seen for 3-4 mins either side.
Perhaps their shape means there will be passes when they are bright and other faint – a bit like iridium flares.
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