Observations of CHIRON by Denis Bergeron, Pierre Ouimet and Jean-Pierre Ducharme, St-Come, Quebec, Canada (E-MAIL: bergeron@achilles.net) Night of May 27th, 1995 Hello dear friend astronomer, This is my seventh report of observation about CHIRON. During this session, we are in our SPRING ASTRONOMICAL CAMP WEEK END named CAMP MARCEL (St-Come, Quebec, Canada). For the occasion, we had photograph CHIRON. Our astronomical equipment was a Meade SCT 8'' F6 telescope equiped with a SBIG ST-6 CCD camera at prime focus. All CCD pictures were exposed 10 minutes in TRACK AND ACCUMULATE MODE. We had taken 3 exposures during this session. My first exposure was taken on May 27th 1995 around 22h00 DST and the last picture on May 27th at 22h38 DST. No filter was used. The seeing was good. During this observation session no FLAT FIELD was taken.. With my software, I add up 3 images centered on CHIRON to show CHIRON alone (see CHIRON.FIT). I haven't detected any evidence of COMA around CHIRON. I include images in FITS and TIFF. The pictures in FITS format are the result of the addition of my 3 images (averaged). Use these images if you wish analyse them. The TIFF pictures are the same images but processed with my image processing software. I include an ANIMATION of CHIRON in the sky (CHIRON.FLI). To see the blink effect, try a software such as AUTODESK ANIMATION (AAPLAY) capable to read FLI files. The time lapsed between the first and last image used to make the FLI image is around 32 minutes. I use Chiron's ephemerides supplied by CPC. They are very precise. If you wish to find Chiron easily, use software with the GUIDE STAR CATALOG such MEGASTAR, THE SKY or others. Plot the position of Chiron on the chart and try to identify stars in the area where Chiron is. Be patient! Don't expose your images more than 10 minutes. I detect a slight shift in my images. It's best to take many 5mn images and add them up to increase the S/N. Be careful to don't saturate the pixels. If you have images of Chiron, please prepare the best ones and send a copy of them to CPC. I'm very interested to look at them. See my others reports Best regards