Kyoto Interop meeting, 17 May 2005 1 A VOTable application: Solar System objects in the VO J. Berthier 1, F. Vachier 1, V. Lainey 1, W. Thuillot 1, J.-E.

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Presentation transcript:

Kyoto Interop meeting, 17 May A VOTable application: Solar System objects in the VO J. Berthier 1, F. Vachier 1, V. Lainey 1, W. Thuillot 1, J.-E. Arlot 1, P. Fernique 2, F. Ochsenbein 2, F. Genova 2 1 Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE / Obs. de Paris, France) 2 Centre de Données astronomiques de Strasbourg (CDS, France)

Kyoto Interop meeting, 17 May Introduction interconnection IMCCE/CDS servers : VizieR SkyBOT: a web service for Solar System objects Implementation of SkyBot in ALADIN

3 IMCCE and CDS Institut de Mécanique Céleste et de Calcul des Ephémérides Institut de Mécanique Céleste et de Calcul des Ephémérides Celestial mechanics: numerical and analytical dynamical theories Celestial mechanics: numerical and analytical dynamical theories Astrometry and models for the motion of the Solar system bodies Astrometry and models for the motion of the Solar system bodies Ephemerides Ephemerides CDS CDS Data center dedicated to the collection and worldwide distribution of astronomical data and related information Data center dedicated to the collection and worldwide distribution of astronomical data and related information Expert in data bases and applications: Expert in data bases and applications: Simbad, Vizier, Aladin Simbad, Vizier, Aladin Astrophysical objects, no solar system objects Astrophysical objects, no solar system objects

4 The Virtual Observatory Project of IMCCE Ephemerides and Virtual Observatory Tools to support observation and analysis: Tools to support observation and analysis: - Web services for fundamental astronomy and planetology Databases : Databases : - Orbital and physical parameters (collab. with data centers) - Observational data : astrometric images and measurements - Codes and algorithms: dynamical models Positions and aspects of Solar system bodies : Positions and aspects of Solar system bodies : - Solar system objects / stellar fields

5 VIZIER: a IMCCE – CDS interconnection Query asteroids in ASTORB database (Bowell, 1976) via VizieR Ephemeris computation for the current date Query form for new computations Query form accessible through CGI scripts (2003) Query form accessible through CGI scripts (2003) VOTable (available in 2005) VOTable (available in 2005) XML web service (end of 2005) XML web service (end of 2005)

6

7

8 Identification of small bodies on « old » plates or CCD frames ? Numerical integration of numerous asteroids Selection of candidates in these orbits Far too long for a VO request

9 Sky Bodies Tracker SkyBoT project Concept: Pre-calculated ephemeris database of the Solar system bodies Pre-calculated ephemeris database of the Solar system bodies Asteroids, planets, natural satellites, comets Asteroids, planets, natural satellites, comets From 1840 (first astronomical photography) to 2019 (Gaia) From 1840 (first astronomical photography) to 2019 (Gaia) Applications: Solar system objects checker Solar system objects checker Sky charts for astronomical observations Sky charts for astronomical observations Fast ephemerides generator Fast ephemerides generator

10 Astorb database from Lowell observatory for Astorb database from Lowell observatory for initial conditions initial conditions Number of asteroids Number of asteroids Numerical integration of all the asteroids over the time span ( ) Numerical integration of all the asteroids over the time span ( ) Mean equatorial heliocentric J2000 rectangular coordinates Time step of 10 days Time step of 10 days Inititial conditions for further computation Inititial conditions for further computation Equatorial geocentric astrometric J2000 coordinates Time step of 1 day Time step of 1 day Interpolated ephemeris for any date Interpolated ephemeris for any date Position error from 10 mas up to tens of arcsec Position error from 10 mas up to tens of arcsec Depending on the quality of the orbit (CEU, CEU rate in Astorb) Depending on the quality of the orbit (CEU, CEU rate in Astorb) Implementation

11 SkyBoT Database > 282,000 asteroids at that time > 282,000 asteroids at that time Tabulated positions over the time span Tabulated positions over the time span (~1 Tø of data; ~10 billions of records) Weekly updates Weekly updates php/MySQL engine in order to deal with a selected date php/MySQL engine in order to deal with a selected date

12 Ephemerides 1949 Boxes 1949 Ephemerides 2019 Boxes ast. 10 days interval Equat. Coo. (t) X,Y,Z (t) < boxes 10 days interval Numb.of the asteroids inside Boxes~20x date + FOV asteroids

13 SkyBoT Tools Cone-search and Resolver tools Cone-search and Resolver tools Query form accessible through the HTTP protocol Query form accessible through the HTTP protocol Web services accessible through the SOAP protocol Web services accessible through the SOAP protocol Query form on the IMCCE web site Query form on the IMCCE web site On-demand tools and implementation On-demand tools and implementation

14 « Cone Search » version

15 « Cone Search » version

16 « Resolver » version

17 « Resolver » version

18 SkyBot help : XML service

19 SkyBot help : XML service

20 Implementation in the Aladin interactive sky atlas

21 Search in archive With Aladin (prototype)

22 Search in archive With Aladin

23 Jungmann 1995 WL4 SkyBoT + Search in archive With Aladin

24 The ingredients VOTable VOTable Registry (GLU) Registry (GLU) Take time (Epoch) properly into account in Aladin Take time (Epoch) properly into account in Aladin For the moment basically the normal Aladin functions, some customization before the service is made public For the moment basically the normal Aladin functions, some customization before the service is made public

25 SkyBoT project 2005: next in Aladin V.3 – probably in September 1949 – – 2019 Asteroids, Planets and major natural satellites Asteroids, Planets and major natural satellites2006: 1840 – – 1949 Other natural satellites, comets Other natural satellites, comets Schedule

26 SkyBoT project Applications: Search for small body Search for small body Dating of plates without log book (?) Dating of plates without log book (?) Data mining (photographic plates, survey) Data mining (photographic plates, survey) Improvement of Near Earth Asteroids orbits Improvement of Near Earth Asteroids orbits Simulated data to prepare space missions (Gaia, interplanetary navigation,...) Simulated data to prepare space missions (Gaia, interplanetary navigation,...) Education Education

27 3D simulation of the Solar system From 10 UA From 50 UA Jupiter Pluto Trojans KBO Education

28 Conclusion Interaction between two institutes in VO frame Interaction between two institutes in VO frame Interpretation / preparation of observations Interpretation / preparation of observations Pre-discoveries of asteroids and comets Pre-discoveries of asteroids and comets Application to any archive or users frames Application to any archive or users frames Data mining for NEO and other Solar System objects Data mining for NEO and other Solar System objects