STEREO - Solar Terrestrial Relations Observatory
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Where is STEREO Today?

Positions of STEREO A and B for 23-Apr-2014 07:00 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)      1.030241        1.005430        0.959129
Semidiameter (arcsec)            931.460         954.445        1000.520

HCI longitude                    332.567         137.319         293.630
HCI latitude                       3.636          -4.929           6.702

Carrington longitude             344.838         149.589         305.901
Carrington rotation number      2150.042        2149.584        2149.150

Heliographic (HEEQ) longitude   -164.752          -0.000         156.311
Heliographic (HEEQ) latitude       3.636          -4.929           6.702

HAE longitude                     48.113         212.856           9.225

Earth Ecliptic (HEE) longitude  -164.743           0.000         156.369
Earth Ecliptic (HEE) latitude      0.280           0.000           0.053

Roll from ecliptic north          -1.027                           0.122
Roll from solar north              5.406                           3.022

Light travel time to Earth (min)          16.781          15.994

Separation angle with Earth              164.740         156.369
Separation angle A with B                         38.889


Last Revised: Wednesday, 23-Apr-2014 03:01:16 EDT
Responsible NASA Official: [e-mail address: gurman<at>gsfc<dot>nasa<dot>gov]
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