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Important notice about the deactivation of the STEREO ftp server

New procedure for updating SolarSoft

Important notice about STEREO Behind

PLASTIC suffered a high voltage anomaly on December 5. The instrument is in the process of being recovered to full operating mode, which is expected to take several days. Until this process is completed, PLASTIC data should be considered as untrustworthy.


Where is STEREO Today?

Positions of STEREO A and B for 23-Jan-2020 06:00 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)      1.032434        0.984203        0.962486
Semidiameter (arcsec)            929.481         975.030         997.030

HCI longitude                    126.028          46.410         328.906
HCI latitude                      -6.084          -5.268           3.736

Carrington longitude             217.389         137.771          60.266
Carrington rotation number      2226.396        2226.617        2226.833

Heliographic (HEEQ) longitude     79.618           0.000         -77.505
Heliographic (HEEQ) latitude      -6.084          -5.268           3.736

HAE longitude                    201.560         122.406          44.470

Earth Ecliptic (HEE) longitude    79.154           0.000         -77.936
Earth Ecliptic (HEE) latitude     -0.209           0.000          -0.022

Roll from ecliptic north           0.038                          -0.003
Roll from solar north             -4.220                           6.202

Light travel time to Earth (min)          10.691          10.183

Separation angle with Earth               79.154          77.936
Separation angle A with B                        157.089

Carrington rotation 2226 runs from 2020-01-06 08:57 (DOY   6.37) to
2020-02-02 17:08 (DOY  33.71), as seen from Earth.

Last Revised: Thursday, 23-Jan-2020 06:01:07 GMT
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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