Important notice about STEREO Behind

Positions of STEREO A and B for 20-Nov-2018 23:00 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 planetary missions
• Explanation of coordinate systems

                                STEREO-B           Earth        STEREO-A

Heliocentric distance (AU)      1.009242        0.987944        0.956291
Semidiameter (arcsec)            950.840         971.338        1003.489

HCI longitude                     87.837         342.680         240.426
HCI latitude                      -7.284           2.167           6.439

Carrington longitude             134.257          29.101         286.847
Carrington rotation number      2210.627        2210.919        2211.203

Heliographic (HEEQ) longitude    105.156          -0.000        -102.254
Heliographic (HEEQ) latitude      -7.284           2.167           6.439

HAE longitude                    163.620          58.315         316.397

Earth Ecliptic (HEE) longitude   105.305           0.000        -101.918
Earth Ecliptic (HEE) latitude     -0.037           0.000           0.122

Roll from ecliptic north          -0.012                          -0.024
Roll from solar north              0.261                          -3.596

Light travel time to Earth (min)          13.206          12.561

Separation angle with Earth              105.305         101.918
Separation angle A with B                        152.777

Carrington rotation 2210 runs from 2018-10-26 20:39 (DOY 299.86) to
2018-11-23 03:59 (DOY 327.17), as seen from Earth.

Last Revised: Tuesday, 20-Nov-2018 23:01:12 GMT
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