Important notice about STEREO Behind

Positions of STEREO A and B for 16-Feb-2019 22:00 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)      1.065007        0.987949        0.962906
Semidiameter (arcsec)            901.053         971.333         996.595

HCI longitude                    170.425          71.778         333.265
HCI latitude                      -1.508          -6.893           3.243

Carrington longitude              49.210         310.563         212.049
Carrington rotation number      2213.863        2214.137        2214.411

Heliographic (HEEQ) longitude     98.647          -0.000         -98.513
Heliographic (HEEQ) latitude      -1.508          -6.893           3.243

HAE longitude                    246.078         147.680          48.849

Earth Ecliptic (HEE) longitude    98.398          -0.000         -98.831
Earth Ecliptic (HEE) latitude     -0.295          -0.000          -0.031

Roll from ecliptic north          -0.045                           0.006
Roll from solar north             -7.195                           6.479

Light travel time to Earth (min)          12.932          12.323

Separation angle with Earth               98.398          98.831
Separation angle A with B                        162.768

Carrington rotation 2214 runs from 2019-02-13 03:53 (DOY  44.16) to
2019-03-12 11:50 (DOY  71.49), as seen from Earth.

Last Revised: Saturday, 16-Feb-2019 22:01:04 GMT
Responsible NASA Official:
Privacy Policy and Important Notices
Feedback and comments: webmaster