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Positions of STEREO A and B for 31-Mar-2023 00:00 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 orbit simulations
• Java orbit viewer (NRL)
• ... other resources

                                STEREO-B           Earth        STEREO-A       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.028103        0.998701        0.965670        0.456307        0.374223        0.547783
Semidiameter (arcsec)            933.396         960.876         993.743        2103.029        2564.319        1751.841

HCI longitude                    120.969         114.107         102.518         221.735         121.455         117.784
HCI latitude                      -6.326          -6.624          -7.155           2.598          -7.994          -2.431

Carrington longitude             279.419         272.557         260.967          20.184         279.904         276.233
Carrington rotation number      2269.224        2269.243        2269.275        2268.944        2269.222        2269.233

Heliographic (HEEQ) longitude      6.862           0.000         -11.589         107.627           7.347           3.677
Heliographic (HEEQ) latitude      -6.326          -6.624          -7.155           2.598          -7.994          -2.431

HAE longitude                    196.526         189.702         178.185         297.518         196.898         193.596

Earth Ecliptic (HEE) longitude     6.824           0.000         -11.517         107.816           7.195           3.894
Earth Ecliptic (HEE) latitude     -0.100           0.000          -0.073          -2.236          -1.796           3.984

Roll from ecliptic north           0.836                          -0.363
Roll from solar north             -2.889                          -1.931

Light travel time to Earth (min)           1.033           1.662                  10.133           5.235           3.798

Separation angle with Earth                6.825          11.517                 107.802           7.415           5.569
Separation angle A with B                         18.341

Carrington rotation 2269 runs from 2023-03-24 08:52 (DOY  83.37) to
2023-04-20 15:34 (DOY 110.65), as seen from Earth.

Last Revised: Thursday, 30-Mar-2023 20:01:06 EDT
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