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Positions of STEREO A and B for 8-Aug-2020 03:00 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)      1.054636        1.013957        0.958730        0.810521        0.789542        0.706659
Semidiameter (arcsec)            909.914         946.419        1000.936        1183.964        1215.424        1357.978

HCI longitude                    299.920         239.790         174.299         254.877           7.074         252.894
HCI latitude                       6.479           6.277          -0.648           3.743          -2.434           5.626

Carrington longitude             104.542          44.413         338.922          59.500         171.696          57.516
Carrington rotation number      2233.710        2233.877        2234.059        2233.835        2233.523        2233.840

Heliographic (HEEQ) longitude     60.130          -0.000         -65.491          15.087         127.283          13.103
Heliographic (HEEQ) latitude       6.479           6.277          -0.648           3.743          -2.434           5.626

HAE longitude                     15.476         315.756         250.029         330.651          83.089         328.740

Earth Ecliptic (HEE) longitude    59.720          -0.000         -65.727          14.895         127.333          12.984
Earth Ecliptic (HEE) latitude      0.186           0.000           0.072          -3.259          -1.521          -1.309

Roll from ecliptic north          -0.106                           0.032
Roll from solar north              3.504                          -7.184

Light travel time to Earth (min)           8.571           8.912                   2.619          13.468           3.015

Separation angle with Earth               59.720          65.727                  15.240         127.317          13.048
Separation angle A with B                        125.446

Carrington rotation 2233 runs from 2020-07-15 06:24 (DOY 197.27) to
2020-08-11 11:37 (DOY 224.48), as seen from Earth.

Last Revised: Saturday, 08-Aug-2020 03:01:06 GMT
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