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Estimation of surface temperatures on Mercury in preparation of the MERTIS experiment onboard BepiColombo

Bauch, Karin and Hiesinger, H. and Greenhagen, Benjamin and Helbert, Jörn (2021) Estimation of surface temperatures on Mercury in preparation of the MERTIS experiment onboard BepiColombo. Icarus: International Journal of Solar System Studies, 354, p. 114083. Elsevier. doi: 10.1016/j.icarus.2020.114083. ISSN 0019-1035.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103520304310

Abstract

The Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS) is part of the payload on the joint ESA-JAXA BepiColombo Mission, launched in October 2018. The spectrometer is designed to map surface composition, identify rock-forming minerals, map surface mineralogy, and study surface temperature variations. The surface of Mercury undergoes large temperature variations depending on solar irradiation. Mineral spectra show significant changes in spectral features with changing temperature. In preparation of the experiment, we developed a thermal model that calculates surface temperatures based on appropriate insolation conditions and thermo-physical properties. This model has been validated with lunar parameters and hence been applied to the conditions of Mercury. Here we present surface temperature maps based on MESSENGER albedo and topography data. The results have been compared to previous models and measurements of Mercury's surface temperatures. The surface of Mercury undergoes large temperature variations each diurnal period. At the equator temperatures vary between less than 100 K during the night up to 700 K at local noon at longitudes 0° W and 180° W, and up to 570 K at longitudes 90° W and 270° W. Due to the 3:2 spin orbit resonance local noon at longitudes 0° W and 180° W coincide with perihelion, while longitudes 90° W and 270° W experience local noon at aphelion, which results in “hot” and “warm” poles around the equator. At 45° N surface temperatures at local noon reach 645 K (0° W and 180° W) and 510 K (90° W and 270° W).

Item URL in elib:https://elib.dlr.de/138733/
Document Type:Article
Title:Estimation of surface temperatures on Mercury in preparation of the MERTIS experiment onboard BepiColombo
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bauch, KarinInstitut für Planetologie, Westfälische Wilhelms‐Universität Münster, Münster, GermanyUNSPECIFIED
Hiesinger, H.Institut für Planetologie, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, GermanyUNSPECIFIED
Greenhagen, BenjaminJohns Hopkins University, APLUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:2021
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:354
DOI :10.1016/j.icarus.2020.114083
Page Range:p. 114083
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Merkur, Thermalmodelle, Temperatur, BepiColombo, MERTIS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project BepiColombo - MERTIS and BELA
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:03 Dec 2020 15:16
Last Modified:03 Dec 2020 15:16

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