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STEREO SCIENCE CENTER

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Where is STEREO Today?

Positions of STEREO A and B for 21-Oct-2019 00:00 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)      1.001041        0.995690        0.956210
Semidiameter (arcsec)            958.629         963.781        1003.574

HCI longitude                     32.600         311.488         229.306
HCI latitude                      -3.704           5.444           5.638

Carrington longitude              20.841         299.728         217.546
Carrington rotation number      2222.942        2223.167        2223.396

Heliographic (HEEQ) longitude     81.112           0.000         -82.183
Heliographic (HEEQ) latitude      -3.704           5.444           5.638

HAE longitude                    108.552          27.026         305.309

Earth Ecliptic (HEE) longitude    81.526           0.000         -81.717
Earth Ecliptic (HEE) latitude      0.219           0.000           0.125

Roll from ecliptic north          -0.034                           0.020
Roll from solar north              6.071                          -4.701

Light travel time to Earth (min)          10.844          10.623

Separation angle with Earth               81.526          81.717
Separation angle A with B                        163.240

Carrington rotation 2223 runs from 2019-10-16 10:20 (DOY 289.43) to
2019-11-12 17:31 (DOY 316.73), as seen from Earth.


Last Revised: Monday, 21-Oct-2019 00:01:02 GMT
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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