STEREO - Science Center - Where is STEREO?

Where is STEREO Today?

Positions of STEREO A and B for 7-Nov-2009 23:00 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)      1.075199        0.990826        0.966921
Semidiameter (arcsec)            892.512         968.513         992.458

HCI longitude                    267.853         329.970          32.500
HCI latitude                       7.284           3.643          -4.033

Carrington longitude             322.871          24.987          87.517
Carrington rotation number      2090.103        2089.931        2089.757

Heliographic (HEEQ) longitude    -62.116          -0.000          62.530
Heliographic (HEEQ) latitude       7.284           3.643          -4.033

HAE longitude                    343.636          45.536         108.488

Earth Ecliptic (HEE) longitude   -61.899           0.000          62.952
Earth Ecliptic (HEE) latitude      0.037           0.000          -0.120

Roll from ecliptic north           0.021                           0.061
Roll from solar north             -0.250                           6.172

Light travel time to Earth (min)           8.504           8.858

Separation angle with Earth               61.899          62.952
Separation angle A with B                        124.851

Last Revised: Saturday, 07-Nov-2009 18:01:27 EST
Responsible NASA Official: Joseph B. Gurman
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