STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 23-Oct-2019 07:00 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)      1.000664        0.995068        0.956209
Semidiameter (arcsec)            958.991         964.384        1003.576

HCI longitude                     34.893         313.769         231.733
HCI latitude                      -3.953           5.249           5.832

Carrington longitude             350.627         269.504         187.467
Carrington rotation number      2223.026        2223.251        2223.479

Heliographic (HEEQ) longitude     81.123           0.000         -82.037
Heliographic (HEEQ) latitude      -3.953           5.249           5.832

HAE longitude                    110.853          29.306         307.732

Earth Ecliptic (HEE) longitude    81.547          -0.000         -81.574
Earth Ecliptic (HEE) latitude      0.211           0.000           0.124

Roll from ecliptic north          -0.033                           0.020
Roll from solar north              5.910                          -4.464

Light travel time to Earth (min)          10.840          10.605

Separation angle with Earth               81.548          81.574
Separation angle A with B                        163.118

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: Wednesday, 23-Oct-2019 03:01:03 EDT
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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