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Positions of STEREO A and B for 25-Apr-2024 06:00 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       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.031909        1.006021        0.957978        0.649732        0.516661        0.494896
Semidiameter (arcsec)            929.954         953.884        1001.722        1476.959        1857.366        1939.050

HCI longitude                    123.831         139.653         150.926         240.026         294.163         230.198
HCI latitude                      -6.144          -4.707          -3.507           3.368           7.936          -0.129

Carrington longitude             132.634         148.456         159.729         248.829         302.966         239.001
Carrington rotation number      2283.632        2283.588        2283.556        2283.309        2283.158        2283.336

Heliographic (HEEQ) longitude    -15.821           0.000          11.273         100.374         154.510          90.545
Heliographic (HEEQ) latitude      -6.144          -4.707          -3.507           3.368           7.936          -0.129

HAE longitude                    199.377         215.192         226.499         315.807           9.690         305.727

Earth Ecliptic (HEE) longitude   -15.815           0.000          11.308         100.615         154.498          90.536
Earth Ecliptic (HEE) latitude     -0.111           0.000           0.029          -2.918           1.313          -5.696

Roll from ecliptic north          -0.395                          -0.145
Roll from solar north             -4.425                          -6.479

Light travel time to Earth (min)           2.342           1.658                  10.764          12.384           9.359

Separation angle with Earth               15.815          11.308                 100.601         154.467          90.533
Separation angle A with B                         27.123

Carrington rotation 2283 runs from 2024-04-09 05:32 (DOY 100.23) to
2024-05-06 11:35 (DOY 127.48), as seen from Earth.

Last Revised: Thursday, 25-Apr-2024 02:01:06 EDT
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