STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 7-Apr-2020 11:00 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)      1.078177        1.001104        0.967305
Semidiameter (arcsec)            890.046         958.570         992.063

HCI longitude                    193.430         122.258          46.447
HCI latitude                       1.421          -6.141          -5.396

Carrington longitude             298.005         226.834         151.023
Carrington rotation number      2229.172        2229.370        2229.580

Heliographic (HEEQ) longitude     71.172           0.000         -75.811
Heliographic (HEEQ) latitude       1.421          -6.141          -5.396

HAE longitude                    269.267         197.817         122.454

Earth Ecliptic (HEE) longitude    71.450           0.000         -75.363
Earth Ecliptic (HEE) latitude     -0.272           0.000          -0.125

Roll from ecliptic north           0.091                          -0.034
Roll from solar north             -6.961                           4.956

Light travel time to Earth (min)          10.111          10.010

Separation angle with Earth               71.450          75.363
Separation angle A with B                        146.810

Carrington rotation 2229 runs from 2020-03-28 08:45 (DOY  88.36) to
2020-04-24 15:16 (DOY 115.64), as seen from Earth.


Last Revised: Tuesday, 07-Apr-2020 07:01:04 EDT
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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