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STEREO SCIENCE CENTER

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Where is STEREO Today?

Positions of STEREO A and B for 18-Sep-2019 05:00 UT

Plot of spacecraft positions

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-B           Earth        STEREO-A

Heliocentric distance (AU)      1.012734        1.004986        0.957279
Semidiameter (arcsec)            947.562         954.866        1002.454

HCI longitude                      0.232         279.040         194.778
HCI latitude                       0.262           7.163           1.966

Carrington longitude              93.602          12.410         288.149
Carrington rotation number      2221.740        2221.966        2222.200

Heliographic (HEEQ) longitude     81.192          -0.000         -84.262
Heliographic (HEEQ) latitude       0.262           7.163           1.966

HAE longitude                     75.963         354.735         270.671

Earth Ecliptic (HEE) longitude    81.228          -0.000         -84.064
Earth Ecliptic (HEE) latitude      0.291          -0.000           0.104

Roll from ecliptic north          -0.044                           0.011
Roll from solar north              7.207                          -7.000

Light travel time to Earth (min)          10.925          10.931

Separation angle with Earth               81.228          84.064
Separation angle A with B                        165.286

Carrington rotation 2221 runs from 2019-08-22 21:23 (DOY 234.89) to
2019-09-19 03:33 (DOY 262.15), as seen from Earth.


Last Revised: Wednesday, 18-Sep-2019 05:01:04 GMT
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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