René Jarry-Desloges

René Jarry-Desloges (February 1, 1868 – June 1, 1951)[1] was a French amateur astronomer who worked at his own observatory.

He observed the planets, and claimed to have confirmed Giovanni Schiaparelli's value of the rotational period of Mercury. However, radar observations made in 1965 showed that they were both wrong.[2]

The French Academy of Sciences awarded him the Janssen Medal for 1914.[3] There is an impact crater on Mars named in his honor.[4] In 1921, he received the Prix Jules Janssen, the highest award of the Société astronomique de France, the French astronomical society.


  1. ^ Hockey, Thomas (2009). The Biographical Encyclopedia of Astronomers. Springer Publishing. ISBN 978-0-387-31022-0. Retrieved August 22, 2012.
  2. ^ Mercury (planet)#Ground-based telescopic research
  3. ^ "Séance publique annuelle du 21 décembre". Le Moniteur scientifique du Doctor Quesneville: 47–48. February 1915.
  4. ^ HiRise, Crater Wall South of Jarry-Desloges Crater (PSP_003666_1660)