STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 1-Dec-2020 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       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      0.999767        0.985996        0.959386        0.803479        0.872142        0.832500
Semidiameter (arcsec)            959.852         973.257        1000.252        1194.340        1100.311        1152.707

HCI longitude                     50.826         353.462         295.846         256.585         115.604          89.722
HCI latitude                      -5.489           0.828           6.581           3.771          -5.144          -3.869

Carrington longitude              23.060         325.696         268.080         228.819          87.838          61.957
Carrington rotation number      2237.936        2238.095        2238.255        2238.364        2237.756        2237.828

Heliographic (HEEQ) longitude     57.364           0.000         -57.616         -96.877         122.142          96.261
Heliographic (HEEQ) latitude      -5.489           0.828           6.581           3.771          -5.144          -3.869

HAE longitude                    126.806          69.176          11.429         332.358         191.267         165.488

Earth Ecliptic (HEE) longitude    57.630           0.000         -57.747         -96.818         122.092          96.313
Earth Ecliptic (HEE) latitude      0.146          -0.000           0.048          -3.285           1.400           3.383

Roll from ecliptic north          -0.095                           0.033
Roll from solar north              4.479                           3.188

Light travel time to Earth (min)           7.961           7.815                  11.176          13.530          11.299

Separation angle with Earth               57.630          57.747                  96.807         122.081          96.302
Separation angle A with B                        115.376

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: Tuesday, 01-Dec-2020 00:01:05 EST
Responsible NASA Official: [email address: therese.a.kucera<at>nasa<dot>gov]
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