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Positions of STEREO A and B for 11-Aug-2022 21:00 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)      1.078550        1.013425        0.956483        0.642215        0.902857        0.568855
Semidiameter (arcsec)            889.739         946.915        1003.287        1494.246        1062.879        1686.945

HCI longitude                    260.536         242.915         221.152         264.551          30.128         125.415
HCI latitude                       7.154           6.465           4.913           3.847          -1.665          -2.677

Carrington longitude              97.355          79.734          57.971         101.370         226.947         322.234
Carrington rotation number      2260.730        2260.779        2260.839        2260.718        2260.370        2261.105

Heliographic (HEEQ) longitude     17.621           0.000         -21.763          21.636         147.213        -117.500
Heliographic (HEEQ) latitude       7.154           6.465           4.913           3.847          -1.665          -2.677

HAE longitude                    336.376         318.867         297.158         340.319         105.877         201.201

Earth Ecliptic (HEE) longitude    17.509           0.000         -21.709          21.452         147.010        -117.666
Earth Ecliptic (HEE) latitude     -0.001           0.000           0.124          -3.373           1.980           3.234

Roll from ecliptic north           0.005                           0.312
Roll from solar north             -1.184                          -5.142

Light travel time to Earth (min)           2.702           3.120                   3.989          15.282          11.420

Separation angle with Earth               17.509          21.709                  21.704         146.957         117.618
Separation angle A with B                         39.218

Carrington rotation 2260 runs from 2022-07-21 16:24 (DOY 202.68) to
2022-08-17 21:45 (DOY 229.91), as seen from Earth.

Last Revised: Thursday, 11-Aug-2022 21:01:05 UTC
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