STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 23-Apr-2024 21:00 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       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.030986        1.005653        0.958126        0.635436        0.498376        0.504070
Semidiameter (arcsec)            930.786         954.234        1001.567        1510.187        1925.510        1903.757

HCI longitude                    122.527         138.316         149.485         238.991         290.608         226.743
HCI latitude                      -6.230          -4.835          -3.669           3.334           7.860          -0.332

Carrington longitude             150.834         166.622         177.791         267.298         318.915         255.050
Carrington rotation number      2283.581        2283.537        2283.506        2283.258        2283.114        2283.292

Heliographic (HEEQ) longitude    -15.788           0.000          11.169         100.676         152.293          88.428
Heliographic (HEEQ) latitude      -6.230          -4.835          -3.669           3.334           7.860          -0.332

HAE longitude                    198.078         213.853         225.052         314.772           6.176         302.251

Earth Ecliptic (HEE) longitude   -15.775           0.000          11.199         100.919         152.323          88.398
Earth Ecliptic (HEE) latitude     -0.107           0.000           0.025          -2.886           1.068          -5.608

Roll from ecliptic north          -0.383                          -0.131
Roll from solar north             -4.275                          -6.374

Light travel time to Earth (min)           2.334           1.642                  10.706          12.188           9.251

Separation angle with Earth               15.776          11.199                 100.905         152.304          88.406
Separation angle A with B                         26.975

Carrington rotation 2283 runs from 2024-04-09 05:32 (DOY 100.23) to
2024-05-06 11:35 (DOY 127.48), as seen from Earth.


Last Revised: Tuesday, 23-Apr-2024 17:01:05 EDT
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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