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STEREO SCIENCE CENTER

Information about STEREO-A close approach to Earth, August 2023

 

Where is STEREO Today?

Positions of STEREO A and B for 10-Feb-2025 04:00 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)      1.001849        0.986785        0.963876        0.728236        0.794020        0.374208
Semidiameter (arcsec)            957.857         972.479         995.592        1317.742        1208.569        2564.426

HCI longitude                     26.961          65.377          95.203         251.173          44.335         255.549
HCI latitude                      -3.130          -6.600          -7.307           3.669          -1.834           0.221

Carrington longitude             229.285         267.701         297.527          93.498         246.659          97.874
Carrington rotation number      2294.363        2294.256        2294.174        2294.740        2294.315        2294.728

Heliographic (HEEQ) longitude    -38.416           0.000          29.826        -174.204         -21.042        -169.828
Heliographic (HEEQ) latitude      -3.130          -6.600          -7.307           3.669          -1.834           0.221

HAE longitude                    102.894         141.317         170.926         326.949         120.037         331.210

Earth Ecliptic (HEE) longitude   -38.423           0.000          29.610        -174.368         -21.280        -170.106
Earth Ecliptic (HEE) latitude      0.173          -0.000          -0.084          -3.198           3.237          -6.802

Roll from ecliptic north           0.218                           0.145
Roll from solar north              6.678                          -0.511

Light travel time to Earth (min)           5.444           4.150                  14.242           3.182          11.270

Separation angle with Earth               38.423          29.610                 173.526          21.513         168.013
Separation angle A with B                         68.033

Carrington rotation 2294 runs from 2025-02-03 03:45 (DOY  34.16) to
2025-03-02 11:51 (DOY  61.49), as seen from Earth.


Last Revised: Monday, 10-Feb-2025 04:01:07 UTC
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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