Important notice about the deactivation of the STEREO ftp server

Important notice about STEREO Behind

Positions of STEREO A and B for 20-May-2019 15:00 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)
• Satellite Situation Center (SSCWeb)
• HelioWeb
• Attitude and orbit text files (CalTech)
• Early orbit summary
• Connections with planetary missions
• Explanation of coordinate systems

                                STEREO-B           Earth        STEREO-A

Heliocentric distance (AU)      1.082600        1.011873        0.967126
Semidiameter (arcsec)            886.411         948.368         992.247

HCI longitude                    250.016         163.419          68.938
HCI latitude                       6.766          -2.077          -6.890

Carrington longitude             253.789         167.192          72.711
Carrington rotation number      2217.295        2217.536        2217.798

Heliographic (HEEQ) longitude     86.597           0.000         -94.481
Heliographic (HEEQ) latitude       6.766          -2.077          -6.890

HAE longitude                    325.927         239.059         144.863

Earth Ecliptic (HEE) longitude    86.868          -0.000         -94.196
Earth Ecliptic (HEE) latitude     -0.054           0.000          -0.117

Roll from ecliptic north           0.005                           0.006
Roll from solar north             -2.467                           2.606

Light travel time to Earth (min)          11.984          12.060

Separation angle with Earth               86.868          94.196
Separation angle A with B                        178.922

Carrington rotation 2217 runs from 2019-05-06 01:04 (DOY 126.04) to
2019-06-02 06:15 (DOY 153.26), as seen from Earth.

Last Revised: Monday, 20-May-2019 15:01:04 GMT
Responsible NASA Official:
Privacy Policy and Important Notices
Feedback and comments: webmaster