New Outburst of Centaur Comet (60558) 174P/Echeclus

We report observations of new outburst of Centaur (60558) 174P/Echeclus, using Suprime-Cam of Subaru tele-scope. The outburst was detected by Jager on May 30, 2011 (Jaeger et al., 2011). We made several follow-up observations for this outburst with 1m telescope at Mt. Lemon Optical Astronomy Observatory located in US and 60cm telescope at Sobaeksan Optical Astronomy Observatory in Korea. The very first presence of coma around (60558) 2000 EC98 has been detected by Choi and Weissman (2006) on 2005 December 30.50 UT with the Palomar 5m telescope. Soon after, the object was given the periodic comet designa-tion 174P/Echeclus. We will present the characterstics and discuss the reason of this recursive outburst.

China NEO Survey Telescope and its preliminary achievement

In recent years, there has been an increasing appreciation for the hazards posed by Near Earth Objects (NEOs), those asteroids and periodic comets whose motions can bring them into the Earth's neighborhood. An NEO Survey Telescope (NEOST) was built in China to be taken part in the international NEO joint survey. This telescope is a 1.0/1.2m Schmidt telescope, equipped with a 4K by 4K CCD detector with a drift-scanning function. After adjusting the telescope and test observations, in December 2006 the NEOST began its NEO survey program. We have found 188 new asteroids including an NEO – 2007 JW2 and one periodic comet –P/2007 S1 (Zhao).

RETHINKING THE HISTORY OF SOLAR WIND STUDIES: EDDINGTON'S ANALYSIS OF COMET MOREHOUSE

Arthur Eddington's very early career is often overshadowed by his later accomplishments. For many years the work he performed at the Royal Observatory, Greenwich, was little studied. In some cases, citations to his work in major journals did not appear for more than three decades. One of his earliest works was a mathematical analysis of the shapes of the envelopes of Comet Morehouse, a non-periodic comet discovered in 1908. Eddington's description of the envelopes, in mathematical terms, as paraboloids projected in two dimensions as parabolas, was not studied in earnest until after his death. Although the primary conclusion of his work has recently been modified, there are several other statements he makes about the source of the creation of these envelopes that suggest he should be acknowledged as the first person to suggest that there is a continuous outflow of ions from the Sun.