Research & Science Home ESA Public Web Site Sci-Tech Portal ESA Intranet     
Astrophysics Missions Planetary Exploration Missions Solar Terrestrial Science Missions Fundamental Physics Missions Science Faculty

Solar System Objects


48 minor planets (and a few other solar system objects) were included in the Hipparcos Catalogue observations. The following animation shows the smoothed motion of these objects with time.


Trajectories of the 48 Hipparcos asteroids during the mission

(November 1989 - March 1993)

 

        credits: animation created from xephem (v_2.9.2), whirlgif and xv.

      The first sequence in this animation shows the trajectories of minor planets (1) Ceres, (2) Pallas and (4) Vesta. Note the unusually large component of Pallas' motion perpendicular to the ecliptic.

      In the next sequence, positions for all observed minor planets are given at incremental epochs during the mission for an observer at constant heliocentric longitude, and varying latitude above the ecliptic (given by the vertical scale on the right). (Only three of the minor planets are labelled.) The animation shows the motion of the minor planets over a certain time interval from a given observation latitude, before moving to views at successively lower observing latitudes. In general the Hipparcos observations did not cover a complete sidereal period.

      The final image again shows the trajectories only for minor planets (1) Ceres, (2) Pallas and (4) Vesta

     Copyright © 2014 European Space Agency. All rights reserved.
This page was first created on 13 April, 2007 and was last updated on 5 July, 2007.
Password Synchronization

The RSSD Web Portal provides a single login facility to simplify access to several other applications within this site.

The login facility has detected that you have passwords to one or more of these other systems (Livelink, Mantis, CVS, etc.) which do not match your current LDAP password.

By clicking on [SYNCHRONIZE] you will be able to reset all these passwords and bring them into line with your main portal password with no further effort on your part.

Synchronizing Passwords - Please Wait

Logging In - Please Wait