IAA authors:
Ortiz, José Luis; Santos-Sanz, Pablo; Duffard, Rene; Morales, Nicolas
Authors:
Hromakina, Tetiana; Belskaya, Irina; Krugly, Yurii; Shevchenko, Vasilij; Ortiz, José Luis; Santos-Sanz, Pablo; Duffard, Rene; Morales, Nicolas; Thirouin, Audrey; Inasaridze, Raguli; Ayvazian, Vova; Kvaratskhelia, Otar; Perna, Davide; Reva, Inna; Serebryanskiy, Alexander; Rumyantsev, Vasilij; Sergeyev, Sergey; Molotov, Igor; Voropaev, Viktor; Velichko, Sergey
Journal:
EUROPEAN PLANETARY SCIENCE CONGRESS 2018
Abstract:
We will present a photometric study of the dwarf planet Makemake based on new observational data obtained between 2006 and 2017 using 0.7 to 3.6-m telescopes around the world. Based on this extensive dataset we derive a high precision rotational period estimate. The resulting lightcurve has a small peak-to-peak amplitude variability, that implies an almost spherical shape or an elongated object in a pole-on orientation. Multi-colour observations allowed us to measure surface colours of Makemake. The magnitude phase dependence slope is quite low and is similar to other bodies with methane ice-rich surfaces. Combining our and literature data we tested Makemake for the existence of long-term brightness variations, and searched for the signs of a satellite.
