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Positions of STEREO A and B for 29-May-2022 11:00 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)
• 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)      1.079536        1.013556        0.961652        0.190231        0.917472        0.591980
Semidiameter (arcsec)            888.926         946.793         997.895        5044.544        1045.948        1621.047

HCI longitude                    196.793         172.066         143.323         311.920         336.681         195.194
HCI latitude                       1.841          -1.003          -4.334           2.851           2.227          -2.157

Carrington longitude               9.168         344.441         315.697         124.295         149.056           7.569
Carrington rotation number      2257.975        2258.043        2258.123        2257.655        2257.586        2257.979

Heliographic (HEEQ) longitude     24.727           0.000         -28.744         139.854         164.615          23.128
Heliographic (HEEQ) latitude       1.841          -1.003          -4.334           2.851           2.227          -2.157

HAE longitude                    272.654         247.769         218.869          27.673          52.356         270.581

Earth Ecliptic (HEE) longitude    24.885          -0.000         -28.900         139.904         164.586          22.812
Earth Ecliptic (HEE) latitude     -0.265           0.000           0.010          -2.547          -0.650          -4.039

Roll from ecliptic north           0.572                           0.016
Roll from solar north             -6.369                          -5.794

Light travel time to Earth (min)           3.789           4.121                   9.693          15.916           4.356

Separation angle with Earth               24.886          28.900                 139.837         164.573          23.148
Separation angle A with B                         53.786

Carrington rotation 2258 runs from 2022-05-28 06:46 (DOY 148.28) to
2022-06-24 11:34 (DOY 175.48), as seen from Earth.

Last Revised: Sunday, 29-May-2022 11:01:06 GMT
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