Exoplanet GJ436 observed and measured at Taurus Hill Observatory.

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Star GJ436 (GSC 1984-1926) has a planet that has a size about the planet Neptune. It has a revolution time of 2.64 days, so it is very close to its mother star. The planet is very interesting due it has observed that is might have water in its atmosphere. Also there are estimates that there might be some other planets around the same star.

Veli-Pekka Hentunen and Markku Nissinen photographed and measured the GJ436 24./25.3. 21:53-00:05 (Finnish time) at Taurus Hill Observatory. They used 25 sec. exposure times and clear filter. The GJ436 was quite high at the southern sky, about 50 degrees. The temperature was about -10 celsius degrees and the rising Moon was present. The comparison stars that were used for the measurements were GSC 1984-2050 (C1), GSC 1984-2006 (C2), GSC 1984-1884 (C3) , GSC 1984-1928 (C4) and GSC 1984-2056 (C5).

Observers: Veli-Pekka Hentunen and Markku Nissinen.