STEREO - Science Center - Where is STEREO?

Where is STEREO Today?

Positions of STEREO A and B for 24-Nov-2009 04:00 UT

Plot of spacecraft positions

This figure plots the current positions of the STEREO Ahead (red) and Behind (blue) spacecraft relative to the Sun (yellow) and Earth (green). The dotted lines show the angular displacement from the Sun. Units are in A.U.

When the two spacecraft are close to Earth, an expanded view of the region around Earth will appear on the right, in the same orientation as the Sun-centered view.

Other resources:


                                STEREO-B           Earth        STEREO-A

Heliocentric distance (AU)      1.066890        0.987326        0.967213
Semidiameter (arcsec)            899.463         971.946         992.158

HCI longitude                    282.174         346.210          49.235
HCI latitude                       7.198           1.736          -5.631

Carrington longitude             107.286         171.322         234.346
Carrington rotation number      2090.702        2090.524        2090.349

Heliographic (HEEQ) longitude    -64.036           0.000          63.025
Heliographic (HEEQ) latitude       7.198           1.736          -5.631

HAE longitude                    357.842          61.869         125.238

Earth Ecliptic (HEE) longitude   -64.027          -0.000          63.369
Earth Ecliptic (HEE) latitude      0.107           0.000          -0.124

Roll from ecliptic north           0.054                           0.061
Roll from solar north              1.579                           4.789

Light travel time to Earth (min)           9.075           8.540

Separation angle with Earth               64.027          63.369
Separation angle A with B                        127.396

Last Revised: Monday, 23-Nov-2009 23:01:11 EST
Responsible NASA Official: Joseph B. Gurman
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