Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

  • Announcements

    sgl_imaging_challenge_banner_lunar.thumb.jpg.ef4882eb5fb3610f8a68e5e6913de0e3.jpg

furrysocks2

Advanced Members
  • Content count

    884
  • Joined

  • Last visited

Community Reputation

560 Excellent

About furrysocks2

Profile Information

  • Location
    Scotland
  1. The EQ3 DSO Challenge

    We AVR going a PIC off-topic.... (Edit: The day I met my wife, I had just used assembly and interrupts to get an LED flashing on a PIC)
  2. The EQ3 DSO Challenge

    Sweet, yeah precisely. I think it's the additional latency/imprecision that means it works better for the moon than for the background. In terms of things to be getting on with, it's definitely "mount first". Clear tonight, but no time to spend today. :/
  3. Hi. Interested. What spec is the supply you've got with it? I've got an ST102 and a 4" AstroZap heater band. Looking to power that, perhaps a 50mm or 70mm finder/guider heater, my EQ3 motors and maybe a focus motor. Looks like the unit itself up to 8A would do all that. Perhaps the supply with it wouldn't, but might go for a power pack. With a 12V cigarette lighter plug, am I thinking along the right lines for a one-stop-shop power solution for a simple setup such as mine? Matt.
  4. IC 405 and 410, Ha with 100D and Star 71

    Full res, corner to corner... wow!!!
  5. The EQ3 DSO Challenge

    Yeah. I calculated the inter-micrcostep interval and nobbled the stepper driver demo code, haven't revisited. As it happened, my quick and dirty sidereal tracking rate is almost bang on for lunar tracking. I'll get the other stepper wired in and house it all with sensible hookup. Intending to go down the OnStep/ASCOM route. May need to revisit stepper supply before I fry either of the drivers. I might look to buy stock items if I get any money at Christmas time.
  6. What did you get up to imaging wise last night?

    I'll kick you off with my retry on M33 - guidescope in a 4". Such a labour that I gave up with no other targets. https://stargazerslounge.com/topic/279039-the-eq3-dso-challenge/?page=42&tab=comments#comment-3322368
  7. The EQ3 DSO Challenge

    Not easy. Maybe I should buy myself a Canon...
  8. The EQ3 DSO Challenge

    Another go at M33... What a pain... I've got a Datyson T7M/ST102/EQ3, no finder, RA stepper on an Arduino with no RTC or timer interrupt, just a sleep/step/sleep/step loop. Tracking kept dropping out, but I twiddled the current limiter and it seemed to settle down. As before, 2x2bin max-gain ~1s exposure to focus (not very successfully) and snapshots from SharpCap with a script monitoring the output folder, plate-solving and displaying FoV in Stellarium... twiddle the dec slomo, loosen the RA clutch to reposition, lock it up, re-snapshot, wait until Stellarium updates, repeat until I find M33. I didn't polar align more than being able to see Polaris while sitting on the ground. That, and the poor timing on the Arduino, still means that darkness creeps up from the edge of the stack. Anyway... 30s 66 gain, 10 darks, live stack of 10. Only real difference this time is I took it 16 bit. I'm pushing my shonky setup at 30s, stars are elongated, but that's ok cause they're not in focus anyway. Dropped resolution to compensate. Levels twiddled in Gimp 2.9. Tonight, I give up. I don't care about Auriga. Too much like hard work.
  9. Meaning of Ha?

    https://en.wikipedia.org/wiki/H-alpha
  10. Danger - I tried goto and I liked it!

    It's taken time, but I got RA motor connected a couple of weeks ago - tracking was a jawdropper! I'd love goto. And a decent camera. And an armchair.
  11. With RA/Dec coordinates and distances, a simple, flawed approach would be to convert to Cartesian coordinates and average. Take for example, a cube: I propose that there are globular clusters at each vertex, A-H. The observer is at A. https://en.wikipedia.org/wiki/Spherical_coordinate_system#Cartesian_coordinates The RA/Dec and distance I have inferred in the following table, using the symbols for azimuth and elevation from the link above: Note: RA of B from A is 0 deg and C from A is 90 deg. Dec of B from A is 0 deg and E from A is 90 deg. θ measures elevation not inclination, so refer to the "switch" mentioned in the link above. I perform a coordinate transformation and average: The average is the proposed "center" and it's cartesian coordinates can be converted back to RA/Dec and distance. A different approach here: http://adsabs.harvard.edu/full/1962AJ.....67..769F
  12. Astro Quiz

    ALMA, aye. I just found it on Google, looking round the facility. When did you go?
  13. Astro Quiz

    You got the A and the M in the right places, it's related.
  14. Astro Quiz

    For bonus points...
×