Just to give some sort of scale to the precision required for these images, this is part of the guiding graph from tonights session. The blue line is error on the RA axis, the red is the DEC axis. RA has more error since this is the one that actually rotates to counter the rotation of the earth. You can see from the scale on the left that the maximum error is about 1 arcsecond. this is roughly 0.000278° which is just under 1 millionth of a full rotation. Since no amount of engineering is going to make gears precise enough for this without being huge and very expensive, I use a technique called guiding which uses a second small camera/telescope to watch stars and continously correct for error, which is what the screenshot is of.

Quote from: Jonneh on January 19, 2017, 10:56:20 pm

Just to give some sort of scale to the precision required for these images, this is part of the guiding graph from tonights session. The blue line is error on the RA axis, the red is the DEC axis. RA has more error since this is the one that actually rotates to counter the rotation of the earth. You can see from the scale on the left that the maximum error is about 1 arcsecond. this is roughly 0.000278° which is just under 1 millionth of a full rotation. Since no amount of engineering is going to make gears precise enough for this without being huge and very expensive, I use a technique called guiding which uses a second small camera/telescope to watch stars and continously correct for error, which is what the screenshot is of.

http://i.imgur.com/KRWr0Rc.png

can u find me a npc with one of those cameras tomorrow

just finished building an all sky camera, idea is to continuously take pictures of the sky at night to detect meteors
just need to wait for my 10m long outdoor ethernet cable to arrive

internals of the all sky camera, although without the camera itself
its controlled by a pi which is powered via poe

who built the case

Quote from: Jonneh on January 22, 2017, 02:54:48 am

internals of the all sky camera, although without the camera itself
its controlled by a pi which is powered via poe

http://i.imgur.com/dGgopsN.jpg

who built the case

Quote from: Drugs on January 22, 2017, 03:16:31 pm

Quote from: Jonneh on January 22, 2017, 02:54:48 am

internals of the all sky camera, although without the camera itself
its controlled by a pi which is powered via poe

http://i.imgur.com/dGgopsN.jpg

who built the case

its a HQ025EMSBK, made by RS but designed by Gainta
normally doesn't come with the dome, I cut a hole out for that and the sealed rj45 jack, then epoxied the dome into place
also epoxied some standoffs for mounting the pi and poe voltage regulator

Quote from: Drugs on January 22, 2017, 03:16:31 pm

Quote from: Jonneh on January 22, 2017, 02:54:48 am

internals of the all sky camera, although without the camera itself
its controlled by a pi which is powered via poe

http://i.imgur.com/dGgopsN.jpg

who built the case

its a HQ025EMSBK, made by RS but designed by Gainta
normally doesn't come with the dome, I cut a hole out for that and the sealed rj45 jack, then epoxied the dome into place
also epoxied some standoffs for mounting the pi and poe voltage regulator

first outdoor test of asc
seems to work okay

now to drill some holes in the garage wall to mount it permanently

Quote from: Jonneh on January 29, 2017, 02:13:54 pm

first outdoor test of asc
seems to work okay

now to drill some holes in the garage wall to mount it permanently

Don't lie, you're going to put it in the back of your taxi and blackmail innocent ladies :kappa: