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Positions of STEREO A and B for 30-Nov-2020 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)      0.999739        0.986117        0.959318        0.805679        0.875595        0.832328
Semidiameter (arcsec)            959.878         973.138        1000.323        1191.079        1095.972        1152.944

HCI longitude                     50.071         352.708         295.054         256.113         114.806          88.867
HCI latitude                      -5.425           0.923           6.625           3.763          -5.202          -3.869

Carrington longitude              32.943         335.581         277.927         238.986          97.678          71.740
Carrington rotation number      2237.908        2238.068        2238.228        2238.336        2237.729        2237.801

Heliographic (HEEQ) longitude     57.363           0.000         -57.653         -96.594         122.098          96.159
Heliographic (HEEQ) latitude      -5.425           0.923           6.625           3.763          -5.202          -3.869

HAE longitude                    126.051          68.416          10.642         331.887         190.470         164.634

Earth Ecliptic (HEE) longitude    57.635          -0.000         -57.774         -96.529         122.054          96.218
Earth Ecliptic (HEE) latitude      0.150           0.000           0.050          -3.278           1.384           3.381

Roll from ecliptic north          -0.097                           0.034
Roll from solar north              4.551                           3.098

Light travel time to Earth (min)           7.962           7.819                  11.165          13.553          11.290

Separation angle with Earth               57.635          57.774                  96.518         122.044          96.207
Separation angle A with B                        115.409

Carrington rotation 2238 runs from 2020-11-28 14:31 (DOY 333.60) to
2020-12-25 22:17 (DOY 360.93), as seen from Earth.

Last Revised: Monday, 30-Nov-2020 11:01:04 GMT
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