Fișier:New SPHERE view of Vesta.jpg
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DescriereNew SPHERE view of Vesta.jpg | English: Sitting between Mars and Jupiter, the doughnut-shaped asteroid belt is packed full of rocky bodies and debris. Despite its fragmented, rubbly nature, the total mass contained within the belt is considerable — roughly four per cent of that of the Moon! The majority of this mass is contained within two distinctive bodies: Ceres, a dwarf planet estimated to make up a third of the mass of the belt, and the asteroid Vesta, which holds around nine per cent of it. Vesta is pictured here. Vesta was recently observed by the SPHERE/ZIMPOL instrument on ESO’s Very Large Telescope (VLT) — the SPHERE image is shown on the left, with a synthetic view derived from space-based data shown on the right for comparison. SPHERE, the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument, is a powerful planet-finding and direct imaging instrument. ZIMPOL is one of its subsystems: a specialised camera perfectly suited to taking very sharp images of small objects — like Vesta. The synthetic image was generated using a tool developed for space missions called OASIS. Factors such as the reflectance of Vesta’s surface and the geometric conditions of the VLT/SPHERE observations where accounted for by OASIS, which used a 3D model of Vesta’s shape based on images from NASA’s Dawn spacecraft (which completed a 14-month survey of Vesta between 2011 and 2012). SPHERE’s image of Vesta is impressive given the separation between Earth and Vesta, and the small size of the asteroid — it lies twice as far from the Sun as our planet does, and has a mean diameter of just 525 kilometres. It shows Vesta’s main features: the giant impact basin at Vesta's south pole, and the mountain at the bottom right. This is the central peak of the Rheasilvia basin, and is roughly 22 kilometres high — over twice as high as the tallest mountain on Earth, Mauna Kea, which rises roughly 10 kilometres from the basin of the Pacific Ocean floor, and nearing the height of the mammoth Martian volcano Olympus Mons. |
Dată | |
Sursă | https://www.eso.org/public/images/potw1826a/ |
Autor | ESO/L. Jorda et al., P. Vernazza et al. |
Licențiere
This media was created by the European Southern Observatory (ESO). Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
Acest fișier a fost eliberat sub licența Creative Commons Atribuire 4.0 Internațională.
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25 iunie 2018
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actuală | 25 iunie 2018 15:23 | 3.618x1.840 (588 KB) | Jmencisom | User created page with UploadWizard |
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Credit/Furnizor | ESO/L. Jorda et al., P. Vernazza et al. |
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Titlu scurt |
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Data și ora producerii imaginii | 25 iunie 2018 06:00 |
Comentarii la fișierul JPEG | Sitting between Mars and Jupiter, the doughnut-shaped asteroid belt is packed full of rocky bodies and debris. Despite its fragmented, rubbly nature, the total mass contained within the belt is considerable — roughly four per cent of that of the Moon! The majority of this mass is contained within two distinctive bodies: Ceres, a dwarf planet estimated to make up a third of the mass of the belt, and the asteroid Vesta, which holds around nine per cent of it. Vesta is pictured here. Vesta was recently observed by the SPHERE/ZIMPOL instrument on ESO’s Very Large Telescope (VLT) — the SPHERE image is shown on the left, with a synthetic view derived from space-based data shown on the right for comparison. SPHERE, the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument, is a powerful planet-finding and direct imaging instrument. ZIMPOL is one of its subsystems: a specialised camera perfectly suited to taking very sharp images of small objects — like Vesta. The synthetic image was generated using a tool developed for space missions called OASIS. Factors such as the reflectance of Vesta’s surface and the geometric conditions of the VLT/SPHERE observations where accounted for by OASIS, which used a 3D model of Vesta’s shape based on images from NASA’s Dawn spacecraft (which completed a 14-month survey of Vesta between 2011 and 2012). SPHERE’s image of Vesta is impressive given the separation between Earth and Vesta, and the small size of the asteroid — it lies twice as far from the Sun as our planet does, and has a mean diameter of just 525 kilometres. It shows Vesta’s main features: the giant impact basin at Vesta's south pole, and the mountain at the bottom right. This is the central peak of the Rheasilvia basin, and is roughly 22 kilometres high — over twice as high as the tallest mountain on Earth, Mauna Kea, which rises roughly 10 kilometres from the basin of the Pacific Ocean floor, and nearing the height of the mammoth Martian volcano Olympus Mons. |
Sursă | European Southern Observatory |
Titlul imaginii |
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Cuvinte cheie | Vesta |
Informații de contact | Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Termeni de utilizare |
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Versiune IIM | 4 |