A 3-night animation of 136199 Eris, the largest known dwarf planet in the solar system, currently at a distance from earth of 95.9 AU and shining at magnitude 18.7

See http://www.physics.drexel.edu/~steinberg/astro/solar_system/tno/eris-3nights.gif
(known to work with Firefox and Chrome).

For those stuck with Internet Explorer, try:
http://www.physics.drexel.edu/~steinberg/astro/solar_system/tno/eris-3nights.avi

The 3 cropped images were taken on 8/31/10 04:36, 9/02/10 06:01 and 9/04/10 05:54 (all times UT). The bright star toward the upper left (NE) is TYC 4687-1709-1 (mag 9.97), while the brightest galaxy is PGC6250 (mag 15.2).

The exposure lengths were 144 min (72x2min unguided), 90 min (45x2min unguided) and 50 min (10x5min guided), respectively.


Dick Steinberg

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Hyperion 320mm f/8 corrected Cassegrain - Paramount ME - Apogee U16M unbinned - 0.73 arcsec/pixel - uncropped FOV 50 arcmin square - cropped to 28 x 22 arcmin - Blue Mountain Vista Observatory (PA) - Orion 80mm Guide Scope fl 910mm f/11.4 (#7380) + SBIG ST8-XME - acquisition and processing: MaxIm DL 5.10 - automation: CCD Commander