Positions of STEREO A and B for 10-Nov-2026 06:00 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)      1.077929        0.990421        0.967162        0.600877        0.899825        0.306217
Semidiameter (arcsec)            890.251         968.909         992.210        1597.046        1066.461        3133.814

HCI longitude                    256.925         331.905          43.296         263.166          13.859           1.217
HCI latitude                       7.026           3.427          -5.115           3.839           8.584           3.240

Carrington longitude              48.420         123.400         194.791          54.662         165.354         152.712
Carrington rotation number      2317.865        2317.657        2317.459        2317.848        2317.541        2317.576

Heliographic (HEEQ) longitude    -74.980          -0.000          71.390         -68.739          41.954          29.312
Heliographic (HEEQ) latitude       7.026           3.427          -5.115           3.839           8.584           3.240

HAE longitude                    332.790          47.480         119.303         338.936          88.452          76.564

Earth Ecliptic (HEE) longitude   -74.689          -0.000          71.823         -68.544          40.973          29.084
Earth Ecliptic (HEE) latitude     -0.041           0.000          -0.125          -3.363          10.255           3.371

Roll from ecliptic north          -0.008                           0.039
Roll from solar north             -1.645                           5.311

Light travel time to Earth (min)          10.452           9.551                   7.923           5.680           6.143

Separation angle with Earth               74.689          71.823                  68.583          42.016          29.262
Separation angle A with B                        146.512

Carrington rotation 2317 runs from 2026-10-23 07:22 (DOY 296.31) to
2026-11-19 14:39 (DOY 323.61), as seen from Earth.

Last Revised: Tuesday, 10-Nov-2026 06:01:08 UTC
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