STEREO - Science Center - Where is STEREO?

Where is STEREO Today?

Positions of STEREO A and B for 21-Nov-2009 15:00 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)      1.068315        0.987833        0.967197
Semidiameter (arcsec)            898.263         971.448         992.174

HCI longitude                    279.914         343.659          46.606
HCI latitude                       7.241           2.049          -5.409

Carrington longitude             141.078         204.823         267.770
Carrington rotation number      2090.608        2090.431        2090.256

Heliographic (HEEQ) longitude    -63.746          -0.000          62.946
Heliographic (HEEQ) latitude       7.241           2.049          -5.409

HAE longitude                    355.600          59.301         122.612

Earth Ecliptic (HEE) longitude   -63.701           0.000          63.312
Earth Ecliptic (HEE) latitude      0.097           0.000          -0.124

Roll from ecliptic north           0.049                           0.062
Roll from solar north              1.294                           5.037

Light travel time to Earth (min)           9.042           8.535

Separation angle with Earth               63.701          63.312
Separation angle A with B                        127.013

Last Revised: Saturday, 21-Nov-2009 10:01:18 EST
Responsible NASA Official: Joseph B. Gurman
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