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Positions of STEREO A and B for 6-Oct-2022 20:00 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-A Fly-by Orbit Tool for Summer 2023
• STEREO orbit simulations
• 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)      1.046538        0.999664        0.958303        0.691575        0.322650        0.482470
Semidiameter (arcsec)            916.954         959.950        1001.382        1387.598        2974.205        1988.989

HCI longitude                    310.571         297.660         280.544         239.065         146.919         227.659
HCI latitude                       5.745           6.430           7.207           3.331          -7.215          -1.371

Carrington longitude              73.655          60.744          43.628           2.149         270.003         350.743
Carrington rotation number      2262.795        2262.831        2262.879        2262.994        2263.250        2263.026

Heliographic (HEEQ) longitude     12.911          -0.000         -17.116         -58.595        -150.741         -70.001
Heliographic (HEEQ) latitude       5.745           6.430           7.207           3.331          -7.215          -1.371

HAE longitude                     26.091          13.238         356.226         314.846         222.131         303.078

Earth Ecliptic (HEE) longitude    12.854          -0.000         -17.012         -58.392        -151.107         -70.159
Earth Ecliptic (HEE) latitude      0.225           0.000           0.077          -2.894          -3.226          -6.722

Roll from ecliptic north          -0.983                           0.254
Roll from solar north              3.726                           1.578

Light travel time to Earth (min)           1.944           2.433                   7.221          10.740           7.921

Separation angle with Earth               12.856          17.012                  58.437         150.943          70.301
Separation angle A with B                         29.866

Carrington rotation 2262 runs from 2022-09-14 03:49 (DOY 257.16) to
2022-10-11 10:29 (DOY 284.44), as seen from Earth.

Last Revised: Thursday, 06-Oct-2022 20:01:05 UTC
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