Kyoto Interop meeting, 17 May 2005Kyoto Interop meeting, 17 May 200511

A VOTable application:A VOTable application:Solar System objects in the Solar System objects in the

VOVOJ. BerthierJ. Berthier11, F. Vachier, F. Vachier11,,

V. LaineyV. Lainey11, , W. ThuillotW. Thuillot11, J.-E. Arlot, J.-E. Arlot11,,P. FerniqueP. Fernique22, F. Ochsenbein, F. Ochsenbein22, F. Genova, F. Genova22

1 Institut de Mécanique Céleste et de Calcul des Ephémérides 1 Institut de Mécanique Céleste et de Calcul des Ephémérides ((IMCCEIMCCE / Obs. de Paris, France) / Obs. de Paris, France)

2 Centre de Données astronomiques de Strasbourg (2 Centre de Données astronomiques de Strasbourg (CDSCDS, France), France)

Kyoto Interop meeting, 17 May 2005Kyoto Interop meeting, 17 May 200522

• Introduction

• interconnection IMCCE/CDS servers : VizieR

• SkyBOT: a web service for Solar System objects

• Implementation of SkyBot in ALADIN

33

IMCCE and CDS Institut de Mécanique Céleste et de Calcul des Institut de Mécanique Céleste et de Calcul des

EphéméridesEphémérides ✔ Celestial mechanics: numerical and analytical dynamical Celestial mechanics: numerical and analytical dynamical

theoriestheories✔ Astrometry and models for the motion of the Solar system Astrometry and models for the motion of the Solar system

bodies bodies ✔ EphemeridesEphemerides

CDSCDS✔ Data center Data center dedicated to the collection and worldwide dedicated to the collection and worldwide

distribution of astronomical data and related information distribution of astronomical data and related information ✔ Expert in data bases and applicationsExpert in data bases and applications::

✔ Simbad, Vizier, AladinSimbad, Vizier, Aladin✔ Astrophysical objects, no solar system objectsAstrophysical objects, no solar system objects

44

The Virtual Observatory Project of IMCCE

Ephemerides and Virtual ObservatoryEphemerides and Virtual Observatory

✔ Tools to support observation and analysis:Tools to support observation and analysis:- Web services for fundamental astronomy and - Web services for fundamental astronomy and

planetologyplanetology

✔ DatabasesDatabases : : - Orbital and physical parameters (collab. with data - Orbital and physical parameters (collab. with data

centers)centers)- Observational data : - Observational data : astrometric images and measurementsastrometric images and measurements

- Codes and algorithms: - Codes and algorithms: dynamical modelsdynamical models

✔ Positions and aspects of Solar system bodies : Positions and aspects of Solar system bodies : - Solar system objects / stellar fields- Solar system objects / stellar fields

55

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)

66

77

88

Identification of small bodies

on « old » plates or CCD frames ?

Numerical integration of numerous asteroids

Selection of candidates in these orbits

Far too longfor a VO request

99

Sky Bodies Tracker Sky Bodies Tracker “SkyBoT” project“SkyBoT” project

Concept:Concept: ✔ Pre-calculated ephemerisPre-calculated ephemeris database of the Solar database of the Solar

system bodiessystem bodies✔ Asteroids, planets, natural satellites, cometsAsteroids, planets, natural satellites, comets✔ From 1840 (first astronomical photography) to 2019 From 1840 (first astronomical photography) to 2019

(Gaia)(Gaia)

ApplicationsApplications::

✔ Solar system objects checkerSolar system objects checker✔ Sky charts for astronomical observationsSky charts for astronomical observations✔ Fast ephemerides generatorFast ephemerides generator

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✔ ““Astorb” database from Lowell observatoryAstorb” database from Lowell observatory for for ✔ initial conditionsinitial conditions✔ Number of asteroidsNumber of asteroids

✔ Numerical integration of all the asteroids over the time span (1949-Numerical integration of all the asteroids over the time span (1949-2019)2019)

Mean equatorial Mean equatorial heliocentricheliocentric J2000 rectangular coordinates J2000 rectangular coordinates➔ Time step of 10 daysTime step of 10 days➔ Inititial conditions for further computationInititial conditions for further computation

Equatorial Equatorial geocentricgeocentric astrometric J2000 coordinates astrometric J2000 coordinates➔ Time step of 1 dayTime step of 1 day➔ Interpolated ephemeris for any dateInterpolated ephemeris for any date

✔ Position errorPosition error from 10 mas up to tens of arcsec 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)

ImplementationImplementation

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SkyBoT DatabaseSkyBoT 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 T(~1 Tøø of data; ~10 billions of records) of data; ~10 billions of records)

✔ Weekly updatesWeekly updates

✔ php/MySQL engine in order to deal with a php/MySQL engine in order to deal with a selected dateselected date

1212

Ephemerides1949

Boxes1949

Ephemerides2019

Boxes2019

•282 000 ast.

•10 days interval

•Equat. Coo. (t)•X,Y,Z (t)

< 580 000 boxes

10 days interval

Numb.of the asteroids inside

Boxes~20’x 20’

.

.

....

date + FOV

asteroids

1313

SkyBoT ToolsSkyBoT Tools

✔ ““Cone-search”Cone-search” and and “Resolver”“Resolver” tools tools✔ Query form accessible through the HTTP protocolQuery form accessible through the HTTP protocol✔ Web services accessible through the SOAP Web services accessible through the SOAP

protocolprotocol

✔ Query form on the IMCCE web siteQuery form on the IMCCE web site✔ ““On-demand” tools and implementationOn-demand” tools and implementation

1414

« Cone Search » version

1515

« Cone Search » version

1616

« Resolver » version

1717

« Resolver » version

1818

SkyBot help : XML service

1919

SkyBot help : XML service

2020

Implementation in Implementation in

the Aladin interactive sky atlasthe Aladin interactive sky atlas

2121

Search in archive

With Aladin

(prototype)

2222

Search in archive

With Aladin

2323

Jungmann

1995 WL4

SkyBoT

+

Search in archive

With Aladin

2424

The ingredientsThe ingredients

VOTableVOTable Registry (GLU)Registry (GLU)

Take time (Epoch) properly into Take time (Epoch) properly into account in Aladinaccount in Aladin

For the moment basically the ‘normal’ For the moment basically the ‘normal’ Aladin functions, some customization Aladin functions, some customization before the service is made publicbefore the service is made public

2525

SkyBoT projectSkyBoT project

2005: next in Aladin V.3 – probably in September2005: next in Aladin V.3 – probably in September✔ 1949 – 20191949 – 2019✔ Asteroids, Planets and major natural satellitesAsteroids, Planets and major natural satellites

2006:2006:✔ 1840 – 19491840 – 1949✔ Other natural satellites, cometsOther natural satellites, comets

Schedule

2626

SkyBoT projectSkyBoT project

Applications: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 orbitsImprovement of Near Earth Asteroids orbits✔ Simulated data to prepare space missions (Gaia, Simulated data to prepare space missions (Gaia,

interplanetary navigation, ...)interplanetary navigation, ...)✔ EducationEducation

2727

3D simulation of the Solar system

From 10 UA

From 50 UA

Jupiter

Pluto

Trojans

KBO

KBO

Education

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ConclusionConclusion Interaction between two institutes in VO Interaction between two institutes in VO

frameframe Interpretation / preparation of observationsInterpretation / preparation of observations Pre-discoveries of asteroids and cometsPre-discoveries of asteroids and comets Application to any archive or user’s framesApplication to any archive or user’s frames Data mining for NEO and other Solar System Data mining for NEO and other Solar System

objectsobjects

http://www.imcce.fr/webservices/http://www.imcce.fr/webservices/