Search Publications
On structural properties of Comet 67/P dust particles collected in situ by ROSETTA/COSIMA from observations of electrical fragmentation
Klaus, Hornung; Eva, Maria Mellado; Oliver, J. Stenzel +20 more
After landing on the target, the kinetic energy can be dissipated within the fragment if it consists of many elements (as in the example of the Kerttu-Ender fragment, Fig. 2). If it consists of only a few elements, as is the case for most fragments traveling longer distances, the kinetic energy is dissipated by rolling. In the case of impact fragm…
Targeting and image acquisition of Martian surface features with TGO/CaSSIS
Cremonese, G.; Thomas, N.; Pommerol, A. +12 more
CaSSIS is a high-resolution visual telescope onboard the ExoMars Trace Gas Orbiter. The mission started the primary science phase in April 2018. The relatively small single image footprint (typically 40 km × 9.5 km) when compared to the total surface area of Mars demands that images should be targeted and target selection is key for the science re…
Comparative analysis of photometric parameters over Apollo landing sites from Terrain Mapping Camera (Chandrayaan-1/2) and lab measured data
Arya, A. S.; Nagori, Rohit; Dagar, Aditya K.
Terrain Mapping Camera (TMC) onboard Chandrayaan-1/2 have provided high spatial resolution (∼5m) panchromatic images in three stereo-views of fore, nadir and aft, (-25⁰, 0⁰, 25⁰), respectively. This study presents the comparative analysis of photometric properties in visible domain from TMC and lab measured data over Apollo 11, 12, 16 and 17 landi…
Astrometry with PRAIA
Assafin, M.
PRAIA - Package for the Reduction of Astronomical Images Automatically - is a suite of astrometric and photometric tasks designed to cope with huge amounts of heterogeneous observations with fast processing, no human intervention, minimum parameterization and yet maximum possible accuracy and precision. It is the main tool used to analyse astronom…
Cloud chemistry on Venus: Sulfuric acid reactions and supercooling in Venus liquid cloud droplets
Baines, K. H.; Delitsky, M. L.
Cloud particles on Venus consist of liquid droplets of aqueous sulfuric acid solutions (H2SO4/H2O) that are the site of chemical reactions arising from uptake (absorption) of surrounding gas molecules into the droplets and subsequent solution chemistry. The Henry's Law constant, H*, for HCl in sulfuric acid in wate…
Effects of stealth CME to ion energisation at ionospheric altitudes of Mars
Thampi, Smitha V.; Venkataraman, V.
The declining phase of Solar cycle 24 produced a slow coronal mass ejection (CME), which was categorized as stealth CME based on the absence of associated low coronal signatures. This CME impacted Mars and caused a major space weather event during 27-28 August 2018 (max vsw = 580 km s-1 near 1.5 AU). The impact of the stealth…
Preface for special issue on the Colour and Stereo Surface Imaging System (CaSSIS) at Mars
Sefton-Nash, Elliot; Wilson, Colin; Hauber, Ernst +2 more
The Colour and Stereo Surface Imaging System (CaSSIS) is the main camera on board the ExoMars Trace Gas Orbiter (TGO). Following launch of TGO on 14 March 2016, CaSSIS began nominal science operations in April 2018. At the time of writing CaSSIS has acquired an average of 21 observations per day, totaling 20.5 Tbits of downlinked telemetry, and ha…
Physical properties of the slow-rotating near-Earth asteroid (2059) Baboquivari from one apparition
Kim, Myung-Jin; Lee, Hee-Jae; Erece, Orhan +6 more
In this study, we carried out photometric, spectroscopic, and for the first time, polarimetric observations of the Amor-type near-Earth asteroid (2059) Baboquivari. Our findings represent the first reliable determination of Baboquivari's physical properties. We used data from a 1m-class telescope (T100) along with ALCDEF data for photometric analy…
New reduction of old glass astronomical plates of Pallas and Vesta in 1956-1994 based on Gaia DR3 catalogue
Ehgamberdiev, Sh. A.; Dong, S.; Yu, Y. +9 more
Through a key project for intergovernmental international cooperation between Uzbekistan and China, a group of old glass astronomical plates of Pallas and Vesta taken by the TAS033 telescope at Tashkent observation site of Ulugh Beg Astronomical Institute in 1956-1994 have been digitized using the digitizer with sub-micrometer measuring precision …
Calibration of NOMAD on ESA's ExoMars Trace Gas Orbiter: Part 1 - The Solar Occultation channel
Vandaele, Ann Carine; Neefs, Eddy; Aoki, Shohei +17 more
Nadir and Occultation for MArs Discovery (NOMAD) is a 3-channel spectrometer suite that is currently orbiting Mars onboard ESA's ExoMars Trace Gas Orbiter, measuring the composition of the Martian atmosphere in unprecedented detail. Of the three channels, two operate in the infrared: the Solar Occultation (SO) channel observes gas species in the 2…