Positions of STEREO A and B for 10-Feb-2010 05:00 UT

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 Orbit Tool
• STEREO orbit simulations
• Java orbit viewer (NRL)
• ... other resources

                                STEREO-B           Earth        STEREO-A

Heliocentric distance (AU)      1.015910        0.986795        0.962825
Semidiameter (arcsec)            944.599         972.469         996.679

HCI longitude                    354.577          65.261         130.588
HCI latitude                       0.985          -6.593          -5.537

Carrington longitude             152.714         223.398         288.726
Carrington rotation number      2093.576        2093.379        2093.198

Heliographic (HEEQ) longitude    -70.684          -0.000          65.328
Heliographic (HEEQ) latitude       0.985          -6.593          -5.537

HAE longitude                     70.262         141.201         206.126

Earth Ecliptic (HEE) longitude   -70.939           0.000          64.925
Earth Ecliptic (HEE) latitude      0.295           0.000          -0.018

Roll from ecliptic north           0.102                           0.007
Roll from solar north              7.321                          -4.703

Light travel time to Earth (min)           9.668           8.705

Separation angle with Earth               70.940          64.925
Separation angle A with B                        135.863

Last Revised: Wednesday, 10-Feb-2010 00:01:11 EST
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