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Positions of STEREO A and B for 25-Jan-2022 04:00 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)      1.006641        0.984450        0.966202        0.698664        0.896286        0.537876
Semidiameter (arcsec)            953.297         974.785         993.195        1373.518        1070.671        1784.105

HCI longitude                     81.915          48.850          14.162         260.028          31.056         210.459
HCI latitude                      -7.188          -5.475          -1.890           3.809          -1.730          -1.654

Carrington longitude             217.293         184.228         149.540          35.405         166.434         345.837
Carrington rotation number      2253.396        2253.488        2253.585        2253.902        2253.538        2253.039

Heliographic (HEEQ) longitude     33.065          -0.000         -34.688        -148.823         -17.794         161.609
Heliographic (HEEQ) latitude      -7.188          -5.475          -1.890           3.809          -1.730          -1.654

HAE longitude                    157.745         124.844          90.051         335.799         106.807         285.843

Earth Ecliptic (HEE) longitude    32.901          -0.000         -34.794        -149.045         -18.038         160.999
Earth Ecliptic (HEE) latitude     -0.006           0.000          -0.103          -3.334           2.017          -5.315

Roll from ecliptic north           0.007                          -0.149
Roll from solar north              1.024                           6.882

Light travel time to Earth (min)           4.693           4.853                  13.501           2.571          12.491

Separation angle with Earth               32.901          34.794                 148.884          18.146         160.296
Separation angle A with B                         67.694

Carrington rotation 2253 runs from 2022-01-11 19:37 (DOY  11.82) to
2022-02-08 03:49 (DOY  39.16), as seen from Earth.

Last Revised: Monday, 24-Jan-2022 23:01:07 EST
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