Positions of STEREO A and B for 9-Nov-2026 10:00 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)      1.078226        0.990619        0.967177        0.610924        0.899579        0.306541
Semidiameter (arcsec)            890.006         968.715         992.195        1570.780        1066.752        3130.503

HCI longitude                    256.199         331.071          42.435         262.508          13.197         355.894
HCI latitude                       7.002           3.520          -5.036           3.834           8.754           3.330

Carrington longitude              59.514         134.387         205.751          65.824         176.513         159.210
Carrington rotation number      2317.835        2317.627        2317.428        2317.817        2317.510        2317.558

Heliographic (HEEQ) longitude    -74.873          -0.000          71.364         -68.564          42.126          24.823
Heliographic (HEEQ) latitude       7.002           3.520          -5.036           3.834           8.754           3.330

HAE longitude                    332.070          46.642         118.442         338.278          87.771          71.273

Earth Ecliptic (HEE) longitude   -74.573           0.000          71.800         -68.364          41.129          24.631
Earth Ecliptic (HEE) latitude     -0.044           0.000          -0.125          -3.358          10.341           2.789

Roll from ecliptic north          -0.009                           0.039
Roll from solar north             -1.735                           5.385

Light travel time to Earth (min)          10.440           9.550                   7.930           5.701           6.020

Separation angle with Earth               74.573          71.800                  68.403          42.184          24.778
Separation angle A with B                        146.372

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: Monday, 09-Nov-2026 10:01:09 UTC
Responsible NASA Official:
Accessibility
Privacy Policy and Important Notices
Feedback and comments: webmaster