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Close Approach of Asteroid 2012 TC4

9 Oct 2012, 10:50 UTC
Close Approach of Asteroid 2012 TC4
(200 words excerpt, click title or image to see full post)

M.P.E.C. 2012-T18, issued on 2012 Oct. 7, reports the discovery of the asteroid 2012 TC4 (discovery magnitude 20.1) by F51 Pan-STARRS 1, Haleakala on images taken on October 04.4 with a 1.8-m Ritchey-Chretien + CCD.2012 TC4 has an estimated size of 13 m - 29 m (H=26.5) and it will have a close approach with Earth at about 0.25 LD (Lunar Distances = ~384,000 kilometers) or 0.0006 AU (1 AU = ~150 million kilometers) at 0531 UT on 12 Oct. 2012. This asteroid will reach the magnitude 13.7 on October 12 around 02 UT. 2012 TC4 is a potential radar target later this week and astrometry is requested!We performed some follow-up measurements of this object, from the H06 ITelescope network (near Mayhill, NM) on 2012, Oct. 09.3, through a 0.25-m f/3.4 reflector + CCD. Below you can see our image, stack of 30x60-second exposures, taken with the asteroid at magnitude ~17.2 and moving at 5.33"/min. At the moment of the close approach on October 12, 2012 TC4 will move at ~ 900"/min. Click on the image below to see a bigger version.Below you can see a short animation showing the movement of 2012 TC4. Click on the thumbnail for a ...

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