Positions of STEREO A and B for 19-Jun-2013 00:00 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)      0.999809        1.016062        0.962683
Semidiameter (arcsec)            959.811         944.458         996.827

HCI longitude                     51.739         191.846         331.615
HCI latitude                      -5.564           1.498           3.433

Carrington longitude             116.942         257.048          36.818
Carrington rotation number      2138.675        2138.286        2137.898

Heliographic (HEEQ) longitude   -140.106           0.000         139.769
Heliographic (HEEQ) latitude      -5.564           1.498           3.433

HAE longitude                    127.718         267.704          47.191

Earth Ecliptic (HEE) longitude  -139.987           0.000         139.487
Earth Ecliptic (HEE) latitude      0.142          -0.000          -0.027

Roll from ecliptic north          -0.171                          -0.031
Roll from solar north              4.312                           6.345

Light travel time to Earth (min)          15.755          15.441

Separation angle with Earth              139.987         139.487
Separation angle A with B                         80.526

Last Revised: Tuesday, 18-Jun-2013 20:01:12 EDT
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