Positions of STEREO A and B for 10-Nov-2026 04:00 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)      1.077959        0.990440        0.967163        0.601903        0.899806        0.306229
Semidiameter (arcsec)            890.226         968.890         992.209        1594.322        1066.483        3133.695

HCI longitude                    256.852         331.822          43.209         263.099          13.793           0.684
HCI latitude                       7.023           3.436          -5.107           3.838           8.601           3.250

Carrington longitude              49.530         124.499         195.887          55.777         166.470         153.362
Carrington rotation number      2317.862        2317.654        2317.456        2317.845        2317.538        2317.574

Heliographic (HEEQ) longitude    -74.970           0.000          71.388         -68.722          41.971          28.863
Heliographic (HEEQ) latitude       7.023           3.436          -5.107           3.838           8.601           3.250

HAE longitude                    332.718          47.396         119.217         338.869          88.384          76.034

Earth Ecliptic (HEE) longitude   -74.678           0.000          71.821         -68.527          40.988          28.638
Earth Ecliptic (HEE) latitude     -0.042           0.000          -0.125          -3.362          10.264           3.314

Roll from ecliptic north          -0.008                           0.039
Roll from solar north             -1.654                           5.318

Light travel time to Earth (min)          10.450           9.551                   7.924           5.682           6.130

Separation angle with Earth               74.678          71.821                  68.566          42.032          28.813
Separation angle A with B                        146.498

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 04:01:08 UTC
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