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Positions of STEREO A and B for 13-Nov-2019 09:00 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

Heliocentric distance (AU)      1.000185        0.989631        0.956653
Semidiameter (arcsec)            959.450         969.682        1003.110

HCI longitude                     56.087         334.820         254.122
HCI latitude                      -5.907           3.097           7.091

Carrington longitude              72.767         351.500         270.802
Carrington rotation number      2223.798        2224.024        2224.248

Heliographic (HEEQ) longitude     81.267          -0.000         -80.698
Heliographic (HEEQ) latitude      -5.907           3.097           7.091

HAE longitude                    132.057          50.409         330.013

Earth Ecliptic (HEE) longitude    81.649           0.000         -80.396
Earth Ecliptic (HEE) latitude      0.122           0.000           0.112

Roll from ecliptic north          -0.020                           0.021
Roll from solar north              4.019                          -1.958

Light travel time to Earth (min)          10.820          10.450

Separation angle with Earth               81.649          80.396
Separation angle A with B                        162.043

Carrington rotation 2224 runs from 2019-11-12 17:31 (DOY 316.73) to
2019-12-10 01:03 (DOY 344.04), as seen from Earth.

Last Revised: Wednesday, 13-Nov-2019 09:01:02 GMT
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