I get an I/O error when I try opening large FITS files (12 Mb). My PC has 512 MB of RAM. Is there a limit on the file size or is there a problem with the...
David, there is no "built in" limitation for file/image size, although I can't remember that I have ever used such a large image. Anyone else ever tried? The...
Herb: I hate to admit it but I am still on Windows 98 (I can imagine all of the chuckles out there). Does binning the image to a smaller size have any ...
I have no problem with the 32MB Uppsala images (4Kx4K), although I suspect that when trying to centroid in crowded fields the cursor resolution may not be...
Robert McNaught
rmn@...
Mar 8, 2007 12:19 am
3343
... That depends on the size of the pixels compared to the size of your stellar images. What is the FWHM of the stars in your images, what is the pixel size? ...
Hi David (and other folks :-)), I regularly open fits files of around 120Mb with no problems using Astrometrica (I have 2Gb of RAM installed). Pretty sure I...
I have been thinking about the OS upgrade. I have a copy of Win2k but I intend to replace the motherboard at the same time (dual slot board with one bad...
I've ftp'ed the file (MPCORB.zip) from the mpc to mi site and it's about 69M when decompressed, seems normal to me. Juan jrhobart <jrhobart@...> wrote:...
... And as of now, no report has been made to the MPC. The problem, as always, is the stupid interface to sftp. I've recoded the offending routine to avoid the...
Hi all, On Sunday, I sent my first observations to MPC. I sent the content of the MPCReport.txt, copied and pasted into the mail of my yahoo account. The...
... Yes, it is probably the advert Yahoo stuck at the end of your message. I note that you omitted to supply your observing site's long., lat. and alt. Please...
Hi all, I am new to the Astrometry. I have submitteda few observations to the MPC, some of them were fine but some showed residuals to 4". I have difficulty in...
First I suggest you check the reported focal length in the astrometrica log file and then double check the pixel size of your camera. Most likely problem is...
Yenal, probably, the program settings are not quite right yet. Makse sure that the CCD pixel size specified in the program settings is set correctly, and that...
Yenal, I see from your homepage your using a meade DSI. I've been through this before. Although the pixel size is 9.6 x 7.5, use 7.5 x 7.5 for the reduction....
Hi all, Thank you all for your replies. Ric, I am using DSI Pro II so its pixel size is 8.3x8.6. I dont know if envisage changes it or not. How can I check it?...
Hi Yenal, If the settings of pixel sizes are correct, how about changing fitting order from linear fit to quadratic fit or cubic fit ? Best regards, Masayuki ...
... Ric, I am using DSI ... Oops, my bad - didn't notice "II". I would still try to match a raw image at 8.3 x 8.6 to take envisage out of the equation. Maybe...
Hello all, I took 3 pictures of the same field. The two first cover 2x5mn and the second was taken just after the first. The third picture was taken around...
Marc, ... Does the third picture have a different field rotation? If not, it should work, so try to increase the number of stars used for the image aligment...
... As well as the alignment area. If this is set too small and the areas in the individual images do not overlap well (or at all), it cannot work. If they...
Hello, Effectively, the third picture has a different field rotation. I had to improve the axis position of the mount. That was done yesterday. I 'm trying...
Hello, I confirm, after correcting de polar alignment again, the problem disappeares. Now the field rotation evolution is 0.02° for an hour. Is this value...
... This shouldn't be a problem. If your field is huge or you want to stack images made during several hours however, then maybe the "displacement" in the...
Herbert Noting that (all being well) UCAC3 will be released some time next year (on DVD), and this will require programming changes in Astrometrica, I was...
Dave, thank you for this suggestion. I assume that online-download is the only useful way to include that data set into Astrometrica, similar to what is done...
Yes. For other reasons (predictions of TNO occultations) I'm in the process of getting a copy of Nomad on disk. Its a mere 100GB...., with about 1.12 billion...
Herbert and all, Do you know the approximate dimension of the UCAC 3 catalogue that will be released next year? How many DVDs will it require? In the past,...
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