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Important notice about the STEREO redirects

New procedure for updating SolarSoft

Read-only problem while updating SolarSoft with WGET

Important notice about STEREO Behind

PLASTIC suffered a background anomaly on Dec 5 2019 that affected the high voltages. Data through February 2019 are test scenarios. Data after February are at lower operational voltages than previously and are undergoing a revised calibration

 

Where is STEREO Today?

Positions of STEREO A and B for 3-Jun-2020 17:00 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       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.084633        1.014440        0.964959        0.191931        0.538365        0.965583
Semidiameter (arcsec)            884.749         945.968         994.475        4999.854        1782.486         993.832

HCI longitude                    242.302         177.544         106.043           2.103         215.907         172.115
HCI latitude                       6.337          -0.310          -7.039          -0.193           5.136          -2.244

Carrington longitude             254.821         190.063         118.561          14.622         228.426         184.634
Carrington rotation number      2231.292        2231.472        2231.671        2231.959        2231.365        2231.487

Heliographic (HEEQ) longitude     64.758          -0.000         -71.502        -175.441          38.363          -5.429
Heliographic (HEEQ) latitude       6.337          -0.310          -7.039          -0.193           5.136          -2.244

HAE longitude                    318.252         253.291         181.685          77.876         291.981         247.663

Earth Ecliptic (HEE) longitude    64.961           0.000         -71.606        -175.414          38.690          -5.628
Earth Ecliptic (HEE) latitude     -0.093           0.000          -0.067           0.076           0.862          -1.237

Roll from ecliptic north           0.045                          -0.025
Roll from solar north             -3.318                          -2.024

Light travel time to Earth (min)           9.388           9.637                  10.029           5.681           0.922

Separation angle with Earth               64.961          71.606                 175.414          38.698           5.762
Separation angle A with B                        136.567

Carrington rotation 2231 runs from 2020-05-21 20:46 (DOY 142.87) to
2020-06-18 01:37 (DOY 170.07), as seen from Earth.


Last Revised: Wednesday, 03-Jun-2020 17:01:09 GMT
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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