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Positions of STEREO A and B for 2-Oct-2022 07:00 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-A Fly-by Orbit Tool for Summer 2023
• STEREO orbit simulations
• Satellite Situation Center (SSCWeb)
• HelioWeb
• Attitude and orbit text files (CalTech)
• Early orbit summary
• Connections with Parker Solar Probe
• Explanation of coordinate systems

                                STEREO-B           Earth        STEREO-A       Parker SP   Solar Orbiter     BepiColombo

Heliocentric distance (AU)      1.049672        1.000995        0.957969        0.649330        0.373667        0.518821
Semidiameter (arcsec)            914.217         958.674        1001.731        1477.873        2568.138        1849.632

HCI longitude                    306.403         293.166         275.724         235.702         121.677         216.219
HCI latitude                       6.057           6.672           7.301           3.211          -8.001          -1.946

Carrington longitude             133.908         120.670         103.229          63.207         309.181          43.723
Carrington rotation number      2262.628        2262.665        2262.713        2262.824        2263.141        2262.879

Heliographic (HEEQ) longitude     13.238           0.000         -17.441         -57.463        -171.489         -76.947
Heliographic (HEEQ) latitude       6.057           6.672           7.301           3.211          -8.001          -1.946

HAE longitude                     21.934           8.766         351.444         311.484         197.116         291.565

Earth Ecliptic (HEE) longitude    13.168          -0.000         -17.322         -57.282        -171.649         -77.200
Earth Ecliptic (HEE) latitude      0.211           0.000           0.085          -2.785          -1.817          -6.216

Roll from ecliptic north          -0.897                           0.275
Roll from solar north              3.399                           0.996

Light travel time to Earth (min)           1.997           2.479                   7.066          11.408           8.492

Separation angle with Earth               13.170          17.322                  57.325         171.455          77.277
Separation angle A with B                         30.490

Carrington rotation 2262 runs from 2022-09-14 03:49 (DOY 257.16) to
2022-10-11 10:29 (DOY 284.44), as seen from Earth.

Last Revised: Sunday, 02-Oct-2022 07:01:05 UTC
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