Positions of STEREO A and B for 15-Nov-2025 15:00 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)      1.064144        0.989124        0.967195        0.662190        0.847138        0.312265
Semidiameter (arcsec)            901.783         970.179         992.176        1449.173        1132.789        3073.123

HCI longitude                    282.579         337.540          27.165         258.896         354.897         354.691
HCI latitude                       7.124           2.780          -3.446           3.797          12.846           3.286

Carrington longitude             135.139         190.101         239.725         111.456         207.457         207.252
Carrington rotation number      2304.625        2304.472        2304.334        2304.690        2304.424        2304.424

Heliographic (HEEQ) longitude    -54.962          -0.000          49.625         -78.645          17.356          17.151
Heliographic (HEEQ) latitude       7.124           2.780          -3.446           3.797          12.846           3.286

HAE longitude                    358.246          53.144         103.132         334.667          69.065          70.086

Earth Ecliptic (HEE) longitude   -54.898           0.000          49.988         -78.476          15.921          16.943
Earth Ecliptic (HEE) latitude      0.045           0.000          -0.118          -3.321          12.102           2.594

Roll from ecliptic north           0.035                           0.098
Roll from solar north              1.610                           6.546

Light travel time to Earth (min)           7.892           6.877                   8.941           2.884           5.796

Separation angle with Earth               54.898          49.988                  78.496          19.903          17.134
Separation angle A with B                        104.886

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: Saturday, 15-Nov-2025 15:01:07 UTC
Responsible NASA Official:
Accessibility
Privacy Policy and Important Notices
Feedback and comments: webmaster