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STEREO SCIENCE CENTER

Important notice about reduced STEREO science operations

 

Where is STEREO Today?

Positions of STEREO A and B for 21-Apr-2015 11:00 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)      1.048130        1.004882        0.960923
Semidiameter (arcsec)            915.562         954.966         998.652

HCI longitude                    308.522         135.285         313.211
HCI latitude                       5.903          -5.115           5.309

Carrington longitude             209.491          36.254         214.180
Carrington rotation number      2162.418        2162.899        2162.405

Heliographic (HEEQ) longitude    173.237           0.000         177.926
Heliographic (HEEQ) latitude       5.903          -5.115           5.309

HAE longitude                     24.047         210.821          28.746

Earth Ecliptic (HEE) longitude   173.226           0.000         177.925
Earth Ecliptic (HEE) latitude      0.218           0.000           0.012

Roll from ecliptic north        -178.161                           0.328
Roll from solar north           -173.652                           5.286

Light travel time to Earth (min)          17.046          16.347

Separation angle with Earth              173.222         177.925
Separation angle A with B                          4.704


Last Revised: Tuesday, 21-Apr-2015 07:01:35 EDT
Responsible NASA Official: [email address: Joseph.B.Gurman<at>nasa<dot>gov]
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