STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 17-Aug-2019 10:00 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)      1.032260        1.012497        0.959838
Semidiameter (arcsec)            929.637         947.783         999.781

HCI longitude                    329.816         248.036         161.587
HCI latitude                       3.936           6.732          -2.251

Carrington longitude             154.132          72.352         345.903
Carrington rotation number      2220.572        2220.799        2221.039

Heliographic (HEEQ) longitude     81.780          -0.000         -86.449
Heliographic (HEEQ) latitude       3.936           6.732          -2.251

HAE longitude                     45.352         323.961         237.221

Earth Ecliptic (HEE) longitude    81.390          -0.000         -86.741
Earth Ecliptic (HEE) latitude      0.276           0.000           0.048

Roll from ecliptic north          -0.040                           0.001
Roll from solar north              6.224                          -6.877

Light travel time to Earth (min)          11.090          11.270

Separation angle with Earth               81.390          86.741
Separation angle A with B                        168.127

Carrington rotation 2220 runs from 2019-07-26 15:55 (DOY 207.66) to
2019-08-22 21:23 (DOY 234.89), as seen from Earth.


Last Revised: Saturday, 17-Aug-2019 06:01:02 EDT
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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