View Single Post
  #1  
Old 18-03-2013, 01:45 PM
avandonk's Avatar
avandonk
avandonk

avandonk is offline
 
Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
Discovering Asteroids or Comets in Your Image Data

I noticed three moving objects in an image of Rho Ophiuchus. Thread here.

The give away is the RGB track. Cosmic rays will only affect one frame and produce a mono coloured track.

http://www.iceinspace.com.au/forum/s...d.php?t=104596
Here is the image with three RGB trails. 10MB
http://d1355990.i49.quadrahosting.com.au/2013_03/RHO_O_RGB.jpg
The only reason these tracks show up is that the objects are moving slowly enough to record on more than one consecutive frame at the same pixel position.
On reflection I decided to stack the data using the maximum for averaging rather than median sigma reject.

Sure enough another two objects appeared that were moving faster.
Image here 15MB
http://d1355990.i49.quadrahosting.com.au/2013_03/MAX_.jpg

The slow moving dim one was now almost lost in the noise.
I combined these two images using max setting and all five objects are now quite clear! 13MB
http://d1355990.i49.quadrahosting.co...AX_med&max.jpg

I cannot find any of these on StarryNightPro.
I am sure there are people out there that know more about identifying asteroids than I do.

Here is a large map 9MB
http://d1355990.i49.quadrahosting.co...013_03/MAP.jpg

The images were taken from 2AM to 6AM Melbourne time on 13_03_2013. My location is in my public profile.


Bert
Attached Thumbnails
Click for full-size image (mapsm.jpg)
122.4 KB54 views
Click for full-size image (MAX_med&maxsm.jpg)
135.9 KB44 views

Last edited by avandonk; 18-03-2013 at 04:55 PM.
Reply With Quote