Positions of STEREO A and B for 7-May-2026 14:00 UT

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 Orbit Tool
• STEREO-A Fly-by Orbit Tool for Summer 2023
• STEREO-A roll angle during Fly-By
• STEREO orbit simulations
• Satellite Situation Center (SSCWeb)
• HelioWeb
• Attitude and orbit text files (CalTech)
• Early orbit summary
• Connections with Parker Solar Probe
• Explanation of coordinate systems

                                STEREO-B           Earth        STEREO-A       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.011240        1.009029        0.954284        0.691510        0.865121        0.327131
Semidiameter (arcsec)            948.961         951.040        1005.599        1387.727        1109.242        2933.462

HCI longitude                     89.846         151.090         208.004         256.415         358.889         320.272
HCI latitude                      -7.255          -3.517           3.541           3.763          12.059           3.135

Carrington longitude               9.096          70.340         127.254         175.665         278.139         239.522
Carrington rotation number      2310.975        2310.805        2310.647        2310.512        2311.227        2310.335

Heliographic (HEEQ) longitude    -61.243          -0.000          56.915         105.326        -152.200         169.183
Heliographic (HEEQ) latitude      -7.255          -3.517           3.541           3.763          12.059           3.135

HAE longitude                    165.613         226.661         283.975         332.188          73.120          35.959

Earth Ecliptic (HEE) longitude   -61.047          -0.000          57.314         105.528        -153.540         169.298
Earth Ecliptic (HEE) latitude     -0.002           0.000           0.118          -3.288          11.825          -1.505

Roll from ecliptic north          -0.005                          -0.075
Roll from solar north              0.015                          -6.473

Light travel time to Earth (min)           8.534           7.841                  11.372          15.101          11.077

Separation angle with Earth               61.047          57.314                 105.501         151.193         169.194
Separation angle A with B                        118.362

Carrington rotation 2310 runs from 2026-04-15 15:50 (DOY 105.66) to
2026-05-12 21:40 (DOY 132.90), as seen from Earth.

Last Revised: Thursday, 07-May-2026 14:01:07 UTC
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