Volume 625, May 2019
|Number of page(s)||7|
|Section||Planets and planetary systems|
|Published online||08 May 2019|
Long-term photometric monitoring of the dwarf planet (136472) Makemake★
Institute of Astronomy, V.N. Karazin Kharkiv National University,
Sumska Str. 35,
2 Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain
3 Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA
4 Kharadze Abastumani Astrophysical Observatory, Ilia State University, K. Cholokoshvili Av. 3/5, Tbilisi 0162, Georgia
5 Samtskhe-Javakheti State University, Rustaveli Street 113, Akhaltsikhe 0080, Georgia
6 INAF – Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monte Porzio Catone (Roma), Italy
7 LESIA – Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, France
8 Crimean Astrophysical Observatory, RAS, 298409 Nauchny, Russia
9 Fesenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
10 Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, 4 Mystetstv St., Kharkiv 61002, Ukraine
11 Keldysh Institute of Applied Mathematics, RAS, Miusskaya Sq. 4, Moscow 125047, Russia
Accepted: 14 March 2019
Aims. We studied the rotational properties of the dwarf planet Makemake.
Methods. The photometric observations were carried out at different telescopes between 2006 and 2017. Most of the measurements were acquired in BVRI broad-band filters of a standard Johnson-Cousins photometric system.
Results. We found that Makemake rotates more slowly than was previously reported. A possible lightcurve asymmetry suggests a double-peaked period of P = 22.8266 ± 0.0001 h. A small peak-to-peak lightcurve amplitude in R-filter A = 0.032 ± 0.005 mag implies an almost spherical shape or near pole-on orientation. We also measured BVRI colours and the R-filter phase-angle slope and revised the absolute magnitudes. The absolute magnitude of Makemake has remained unchanged since its discovery in 2005. No direct evidence of a newly discovered satellite was found in our photometric data; however, we discuss the possible existence of another larger satellite.
Key words: Kuiper belt objects: (136472) individual: Makemake / techniques: photometric
Table A.1 is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (18.104.22.168) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/625/A46
© ESO 2019
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