STEREO - Solar Terrestrial Relations Observatory
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Important notice about STEREO Behind

 

Where is STEREO Today?

Positions of STEREO A and B for 8-Jul-2025 11:00 UT

Plot of spacecraft positions

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-B           Earth        STEREO-A       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.065104        1.016599        0.955599        0.564626        0.880244        0.458161
Semidiameter (arcsec)            900.971         943.959        1004.216        1699.582        1090.183        2094.523

HCI longitude                    169.910         210.227         251.366         233.124          26.448         177.189
HCI latitude                      -1.469           3.669           6.991           3.116           5.149          -3.248

Carrington longitude              68.806         109.124         150.262         132.020         285.344          76.085
Carrington rotation number      2299.809        2299.697        2299.583        2299.633        2299.207        2299.789

Heliographic (HEEQ) longitude    -40.317          -0.000          41.138          22.897         176.221         -33.039
Heliographic (HEEQ) latitude      -1.469           3.669           6.991           3.116           5.149          -3.248

HAE longitude                    245.573         286.194         327.275         308.906         101.442         252.567

Earth Ecliptic (HEE) longitude   -40.622           0.000          41.081          22.712         175.249         -33.627
Earth Ecliptic (HEE) latitude     -0.194          -0.000           0.114          -2.691           8.342          -2.871

Roll from ecliptic north          -0.227                          -0.128
Roll from solar north             -7.366                          -2.439

Light travel time to Earth (min)           6.022           5.775                   4.513          15.722           5.694

Separation angle with Earth               40.622          41.081                  22.862         170.408          33.735
Separation angle A with B                         81.703

Carrington rotation 2299 runs from 2025-06-19 12:06 (DOY 170.50) to
2025-07-16 16:54 (DOY 197.70), as seen from Earth.


Last Revised: Tuesday, 08-Jul-2025 07:01:06 EDT
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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