Further to IAUC 9184, Alain Maury also reports on positive observations of the occultation of a star (V about 17) by minor planet (136199) Eris on Nov. 6 by Sebastian Saravia, Caisey Harlingten, and himself from San Pedro de Atacama Celestial Explorations Observatory. The occultation was recorded with a 50-cm Planewave telescope, using 3-s individual frames; the occultation lasted a little more than 70 seconds. More information on the occultation has been posted at the following website URL: http://www.spaceobs.com/perso/recherche/Eris/. The observed phenomena are in good agreement with the predictions made by Bruno Sicardy using observations by M. Assafin, J. L. Ortiz, and W. M. Owen (see Ortiz et al., IAUC 9184). A preliminary analysis by Sicardy, combining the occultation duration at La Silla (Jehin et al., IAUC 9184) and the present observation indicates that Eris has a diameter < 2320 km -- therefore smaller than Pluto, whose diameter is > 2340 km.
International Astronomical Union Circular
- Pub Date:
- November 2010