Asteroid occultations today and tomorrow: toward the GAIA era
نویسنده
چکیده
Context. Observation of star occultations is a powerful tool to determine shapes and sizes of asteroids. This is key information necessary for studying the evolution of the asteroid belt and to calibrate indirect methods of size determination, such as the models used to analyze thermal infrared observations. Up to now, the observation of asteroid occultations is an activity essentially secured by amateur astronomers equipped with small, portable equipments. However, the accuracy of the available ephemeris prevents accurate predictions of the occultation events for objects smaller than ∼100 km. Aims. We investigate current limits in predictability and observability of asteroid occultations, and we study their possible evolution in the future, when high accuracy asteroid orbits and star positions (such as those expected from the mission Gaia of the European Space Agency)
منابع مشابه
Alzheimer's Disease: Yesterday, Today, Tomorrow
Alzheimer's disease is the most common and well - known cause of dementia, as a progressive, irreversible brain disorder that affects cognitive function, personality, thought, perception and behaviour. Alzheimer's disease is the fourth leading cause of death in western countries. Interesting to know that this disease was unknown in medical community till 100 years ago and had no name. Dr. Alois...
متن کاملToday Delirium, Tomorrow Dementia: The role of The Anesthesiologist
Delirium is a common postoperative complication in adolescence patients and is associated with increased costs, morbidity and mortality. Recently, an association between the occurrence of delirium and increased risk of dementia has been revealed. Several risk factors have been found to be related with the development of postoperative delirium. However, the three strategies include monitoring d...
متن کاملFinancial Management in Children: Today Need, Tomorrow Necessity
Nearly 80% of young people today will never be able to retire. Why? Because they lack the personal finance training that leads to long-term planning and future security. Connecting the dots between kids and money management skills prepares them for the financial realities the world will face over the next century. Pocket money is one of the first ways for children to learn the basics of managin...
متن کاملVirulence of Helicobacter Pylori: Yesterday, Today and Tomorrow
Abstract Undoubtedly, H. pylori is the major human gastric pathogen, which infects the mucosal epithelium in 50% of world population. However, H. pylori infection is relatively prevalent globally the majority of infected individuals are asymptomatic. The recent epidemiological studies show that the various gastro intestinal complications can be the result of genetic variation in H. pylori stra...
متن کامل