OSIRIS-REx Spacecraft Earth Gravity Assist Flyby

Mike Olason
Location of photo
Denver Colorado
Date/Time of photo
22 September 2017, 0957UT
11" SCT f/6.4 and STF-8300M CCD Camera
This collection of 3 second images was taken about 7 hours before the OSIRIS-REx Spacecraft's close approach to Earth during it's Earth gravity assist flyby on it's way to Asteroid Bennu. At the time of these images the Spacecraft was magnitude 15.5 moving across Earth's night sky at 1.67 degrees per hour to the left in this image. The 46 images were stacked to show the Spacecraft at the center of the image as it moved by the stars with each star appearing as a line of 46 dots. The upper right inset shows a 3 second image of the Spacecraft (ORX).
Astronomy Pictures: Sky & Telescope's Online Gallery, Miscellaneous Scenes & Skies
Mike Olason

About Mike Olason

I started imaging comets in 1994 with an ST-5 CCD Camera and an 11" SC Telescope. Since then the CCD cameras have changed (ST-7, ST-402ME and STF-8300M), but I am still using the 11" SC Telescope. Naturally I have used a lot of smaller telescopes to obtain larger fields of view. I live south of Denver at an elevation of 6150 feet which allows me to image comets down to almost magnitude 21 on a perfect night. Unfortunately ChemTrails have turned Denver cloudy and dry. I use the camera software CCDOps to process my images. All I do to each image is dark subtraction and flat field, stack images as required to show faint comets, contrast/bright adjust the final image and maybe use a median filter to reduce the image noise. The result is an image that reflects reality and will never win any picture of the day award. If you would like to use my images for a project or ask a question send me an email to "moicylander@centurylink.net".
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.


This site uses Akismet to reduce spam. Learn how your comment data is processed.