J/A+A/625/A46 Makemake (136472) long-term photometry (Hromakina+, 2019)
Long-term photometric monitoring of the dwarf planet (136472) Makemake.
Hromakina T.A., Belskaya I.N., Krugly Yu. N, Shevchenko V.G., Ortiz J.L.,
Santos-Sanz P., Duffard R., Morales N., Thirouin A., Inasaridze R. Ya.,
Ayvazian V.R, Zhuzhunadze V.T., Perna D., Rumyantsev V.V., Reva I.V.,
Serebryanskiy A.V., Sergeyev A.V., Molotov I.E., Voropaev V.A.,
Velichko S.F.
<Astron. Astrophys. 625, A46 (2019)>
=2019A&A...625A..46H 2019A&A...625A..46H (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Photometry, UBVRI
Keywords: Kuiper belt objects: individual: (136472) Makemake -
techniques: photometric
Abstract:
We aim to study the rotational properties of the dwarf planet
Makemake.
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.
We found that Makemake rotates more slowly than was previously
reported. A possible lightcurve asymmetry suggests a double-peaked
period of P=22.8266±0.0001h. A small peak-to-peak lightcurve
amplitude in R-filter A=0.032±0.005mag 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 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.
Description:
The observations were carried out during 53 nights between 2006 and
2017. We used ten mid-sized telescopes at different observational
sites, namely, the 3.6m Telescopio Nazionale Galileo (TNG), the 2.6m
Shain Telescope at Crimean Astrophysical Observatory (CrAO), the 2.5m
Isaac Newton Telescope (INT) at Roque de los Muchachos Observatory,
the 2.0m telescope at Peak Terskol Observatory (Terskol), the 1.5m
telescope at Sierra Nevada Observatory (OSN), the 1.2m telescope at
Calar Alto Observatory (CAO), the 1.0m Zeiss 1000 telescope at Simeiz
Observatory (Simeiz), the 1.0m East and West telescopes at Tien Shan
Astronomical Observatory (Tien Shan), the 0.7m Maksutov meniscus
telescope at Abastumani Astrophysical Observatory (AbAO), and the 0.7m
telescope at Chuguev Observatory of V. N. Karazin Kharkiv National
University (Chuguev).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 80 76 Makemake photometry
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 "date" Date UT date in yyyy/mm/dd.dd format
15- 20 F6.3 AU r Heliocentric distance
22- 27 F6.3 AU delta Geocentric distance
29- 32 F4.2 deg alpha Solar phase angle
34- 40 F7.3 deg ELONG Ecliptic longitude in epoch J2000.0
42- 47 F6.3 deg ELAT Ecliptic latitude in epoch J2000.0
49- 54 F6.3 mag mag ? Mean reduced magnitude in Filter
56- 60 F5.3 mag e_mag Magnitude error (1)
62- 66 A5 --- Filter Filter in which the magnitude was measured,
B, V, R, I, Clear
68- 70 F3.1 h DeltaT ? Duration of observations (2)
72- 80 A9 --- Obs Telescope/observatory acronym
--------------------------------------------------------------------------------
Note (1): The error correspond to an absolute magnitude uncertainty when
an absolute brightness was measured, and to a differential
photometry error otherwise.
Note (2): For the nights, when only few data points were acquired,
the duration of observations is not shown in the table.
--------------------------------------------------------------------------------
Acknowledgements:
Tetiana Hromakina, hromakina(at)astron.kharkov.ua
(End) Patricia Vannier [CDS] 15-Mar-2019