Positions of STEREO A and B for 23-Nov-2025 18:00 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)      1.059284        0.987460        0.967241        0.571435        0.877232        0.329628
Semidiameter (arcsec)            905.921         971.815         992.129        1679.328        1093.927        2911.245

HCI longitude                    289.876         345.689          35.525         265.054           2.065          43.098
HCI latitude                       6.892           1.799          -4.355           3.850          11.387           1.619

Carrington longitude              27.188          83.001         132.837           2.366          99.377         140.410
Carrington rotation number      2304.924        2304.769        2304.631        2304.993        2304.724        2304.610

Heliographic (HEEQ) longitude    -55.813          -0.000          49.836         -80.635          16.376          57.409
Heliographic (HEEQ) latitude       6.892           1.799          -4.355           3.850          11.387           1.619

HAE longitude                      5.492          61.345         111.522         340.823          76.358         118.484

Earth Ecliptic (HEE) longitude   -55.853          -0.000          50.177         -80.522          15.013          57.139
Earth Ecliptic (HEE) latitude      0.069           0.000          -0.123          -3.376          11.559           6.563

Roll from ecliptic north           0.050                           0.101
Roll from solar north              2.510                           5.997

Light travel time to Earth (min)           7.990           6.895                   8.787           2.698           7.120

Separation angle with Earth               55.853          50.177                  80.539          18.865          57.381
Separation angle A with B                        106.030

Carrington rotation 2304 runs from 2025-11-02 17:43 (DOY 306.74) to
2025-11-30 01:08 (DOY 334.05), as seen from Earth.

Last Revised: Sunday, 23-Nov-2025 18:01:42 UTC
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