Positions of STEREO A and B for 16-May-2012 20:00 UT

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 Orbit Tool
• STEREO orbit simulations
• Java orbit viewer (NRL)
• ... other resources

                                STEREO-B           Earth        STEREO-A

Heliocentric distance (AU)      0.999876        1.011300        0.957779
Semidiameter (arcsec)            959.746         948.905        1001.930

HCI longitude                     42.540         160.545         275.232
HCI latitude                      -4.736          -2.425           7.308

Carrington longitude             355.498         113.503         228.190
Carrington rotation number      2124.013        2123.685        2123.366

Heliographic (HEEQ) longitude   -118.005           0.000         114.687
Heliographic (HEEQ) latitude      -4.736          -2.425           7.308

HAE longitude                    118.519         236.166         350.955

Earth Ecliptic (HEE) longitude  -117.647           0.000         114.789
Earth Ecliptic (HEE) latitude      0.182           0.000           0.086

Roll from ecliptic north          -0.096                           0.041
Roll from solar north              5.241                           0.701

Light travel time to Earth (min)          14.312          13.798

Separation angle with Earth              117.647         114.789
Separation angle A with B                        127.563

Last Revised: Wednesday, 16-May-2012 16:01:29 EDT
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