NEODyS[1] (Near Earth Objects Dynamic Site) is an Italian service that provides information on near-Earth objects with a Web-based interface. It is based on a continually and (almost) automatically maintained database of near earth asteroid orbits. This site provides a number of services to the NEO community. The main service is an impact monitoring system (CLOMON2) of all near-Earth asteroids covering a period until the year 2100.[1]
Risk Page[2]: One of the most important services is the production of a Risk Page where 1128 NEOs with probabilities of hitting the Earth greater of 10−11 from now until 2100 are shown in a Risk list.[2] In the table of the Risk list the NEOs are divided into "Special", as it is the case of 101955 Bennu; "Observable", objects which are presently observable and which critically need a follow up in order to improve their orbit; "Possible recovery", objects which are not visible at present, but which are possible to recover in the near future; "Lost", objects which have an absolute magnitude (H) brighter than 25 but which are virtually lost, being their orbit too uncertain; and "Small", objects with an absolute magnitude fainter than 25 and, even if they are "lost", they are considered too small to result in heavy damage on the ground. Each object has its own Impactor Table (IT) which shows many parameters useful to determine the risk assessment. As of September 2019[update], 551 of the risk-listed asteroids are considered too small (H > 25 and less than ~35 meters in diameter) to result in heavy damage on the ground.
Ephemerides: It provides ephemerides of the object, that is position on sky, V magnitude, altitude, airmass, solar and lunar elongation, phase angle, galactic coordinates, R distance to the Sun, delta distance to the Earth, motion on sky, and the uncertainty on sky.[2]
Observation prediction: It provides the position of the object at a specific time, information useful for the observer and a graph showing the uncertainty on sky.
Orbital Information: It provides the dynamical parameters of the orbit of the object.
Proper elements: It shows the secular properties of the object.
Observational Information: It provides data of both optical and radar observations and their statistical performance.
Close approaches: It provides a table with all the close approaches until 2100 with the planets of the Solar System.
Search: It provides the possibility of queries in the database according to the orbital parameters or the observational conditions or the close approaches with the planets of the Solar System.
Observatories: It is possible to access the information regarding observatories and their performances.
Other services: Physical Information provided by ESA's NEO Coordination Centre; Orbit animation provided by the NEO Program Office at the Jet Propulsion Laboratory
How NEODyS works
NEODyS is based on a Postgresql database running on a Linux system.
The database of orbits is continually and automatically maintained with the most recent Minor Planet Center observations. The orbits are computed with the OrbFit software package provided by the OrbFit Consortium. All of the computational services provided by this site can also be done with this software package.
Future expansion of NEODyS
NEODyS is continually expanding and improving. The following are the next tasks of the project:
Uncertainties of all the quantities provided with the orbit, e.g., MOID and absolute magnitude
Variable time span for impact monitoring, based upon orbit uncertainty
Inclusion of non-gravitational perturbations in the dynamic model
Major update
On February 5, 2009 NEODyS went through a major update of the system. A new web-interface is available running the free software PHP. This allows a more flexible and easy to update system. In the same period the system switched to the new version of the Fortran 95 code OrbFit 4.0.
Since 2011 NEODyS is operated and maintained for the European Space Agency by the University of Pisa spin-off SpaceDyS, based in Navacchio near Pisa. SpaceDyS provides data and scientific consultancy to the European Space Agency NEO Coordination Centre based in ESRIN, Frascati, Italy.
The NEODyS team
The NEODyS team is composed by Fabrizio Bernardi (SpaceDyS, Italy), Andrea Chessa (SpaceDyS, Italy), Alessio Del Vigna (SpaceDyS, Italy), Linda Dimare (SpaceDyS, Italy), Davide Bracali Cioci (SpaceDyS, Italy), Giovanni F. Gronchi(University of Pisa, Italy), Giacomo Tommei (University of Pisa, Italy) and Giovanni B. Valsecchi (IASF-INAF, Rome, Italy). Pisa, Italy).[3] The NEODyS founder was Andrea Milani (Dep. of mathematics, University of Pisa, Italy), Steve Chesley (Jet Propulsion Laboratory, USA) and María Eugenia San Saturio Lapeña (E.T.S. de Ingenieros Industriales, University of Valladolid, Spain).
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This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help to improve this article by introducing more precise citations September 2017 Learn how and when to remove this template message NEODyS 1 Near Earth Objects Dynamic Site is an Italian service that provides information on near Earth objects with a Web based interface It is based on a continually and almost automatically maintained database of near earth asteroid orbits This site provides a number of services to the NEO community The main service is an impact monitoring system CLOMON2 of all near Earth asteroids covering a period until the year 2100 1 Contents 1 Services 2 How NEODyS works 3 Future expansion of NEODyS 4 Major update 5 The NEODyS team 6 See also 7 References 8 External linksServices EditRisk Page 2 One of the most important services is the production of a Risk Page where 1128 NEOs with probabilities of hitting the Earth greater of 10 11 from now until 2100 are shown in a Risk list 2 In the table of the Risk list the NEOs are divided into Special as it is the case of 101955 Bennu Observable objects which are presently observable and which critically need a follow up in order to improve their orbit Possible recovery objects which are not visible at present but which are possible to recover in the near future Lost objects which have an absolute magnitude H brighter than 25 but which are virtually lost being their orbit too uncertain and Small objects with an absolute magnitude fainter than 25 and even if they are lost they are considered too small to result in heavy damage on the ground Each object has its own Impactor Table IT which shows many parameters useful to determine the risk assessment As of September 2019 update 551 of the risk listed asteroids are considered too small H gt 25 and less than 35 meters in diameter to result in heavy damage on the ground Ephemerides It provides ephemerides of the object that is position on sky V magnitude altitude airmass solar and lunar elongation phase angle galactic coordinates R distance to the Sun delta distance to the Earth motion on sky and the uncertainty on sky 2 Observation prediction It provides the position of the object at a specific time information useful for the observer and a graph showing the uncertainty on sky Orbital Information It provides the dynamical parameters of the orbit of the object MOID It shows the analysis of the Minimum Orbital Intersection Distance MOID of the object Proper elements It shows the secular properties of the object Observational Information It provides data of both optical and radar observations and their statistical performance Close approaches It provides a table with all the close approaches until 2100 with the planets of the Solar System Search It provides the possibility of queries in the database according to the orbital parameters or the observational conditions or the close approaches with the planets of the Solar System Observatories It is possible to access the information regarding observatories and their performances Other services Physical Information provided by ESA s NEO Coordination Centre Orbit animation provided by the NEO Program Office at the Jet Propulsion LaboratoryHow NEODyS works EditNEODyS is based on a Postgresql database running on a Linux system The database of orbits is continually and automatically maintained with the most recent Minor Planet Center observations The orbits are computed with the OrbFit software package provided by the OrbFit Consortium All of the computational services provided by this site can also be done with this software package Future expansion of NEODyS EditNEODyS is continually expanding and improving The following are the next tasks of the project Uncertainties of all the quantities provided with the orbit e g MOID and absolute magnitude Variable time span for impact monitoring based upon orbit uncertainty Inclusion of non gravitational perturbations in the dynamic modelMajor update EditOn February 5 2009 NEODyS went through a major update of the system A new web interface is available running the free software PHP This allows a more flexible and easy to update system In the same period the system switched to the new version of the Fortran 95 code OrbFit 4 0 Since 2011 NEODyS is operated and maintained for the European Space Agency by the University of Pisa spin off SpaceDyS based in Navacchio near Pisa SpaceDyS provides data and scientific consultancy to the European Space Agency NEO Coordination Centre based in ESRIN Frascati Italy The NEODyS team EditThe NEODyS team is composed by Fabrizio Bernardi SpaceDyS Italy Andrea Chessa SpaceDyS Italy Alessio Del Vigna SpaceDyS Italy Linda Dimare SpaceDyS Italy Davide Bracali Cioci SpaceDyS Italy Giovanni F Gronchi University of Pisa Italy Giacomo Tommei University of Pisa Italy and Giovanni B Valsecchi IASF INAF Rome Italy Pisa Italy 3 The NEODyS founder was Andrea Milani Dep of mathematics University of Pisa Italy Steve Chesley Jet Propulsion Laboratory USA and Maria Eugenia San Saturio Lapena E T S de Ingenieros Industriales University of Valladolid Spain See also EditList of near Earth object observation projectsReferences Edit a b Near Earth Objects Dynamic Site NEODyS 2 European Space Agency Retrieved 20 November 2018 a b c NEODyS 2 Risk List NEODyS 2 European Space Agency Retrieved 20 November 2018 SpaceDyS About Us Space Dynamics Service Retrieved 23 January 2020 External links EditNeoDys official website Orbfit NASA JPL Near Earth Object Program ESA NEO Coordination Centre Portals Astronomy Stars Spaceflight Outer space Solar System Retrieved from https en wikipedia org w index php title NEODyS amp oldid 1066227325, wikipedia, wiki, book, books, library,
