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Information
about STEREO-A close approach to Earth, August 2023

Positions of STEREO A and B for 3-Dec-2023 14:00 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-B Earth STEREO-A Parker SP Solar Orbiter BepiColombo
Heliocentric distance (AU) 1.021643 0.985788 0.967104 0.642630 0.860751 0.590052
Semidiameter (arcsec) 939.299 973.463 992.270 1493.282 1114.873 1626.346
HCI longitude 342.002 355.076 1.539 264.949 344.672 164.094
HCI latitude 2.437 0.622 -0.287 3.846 5.821 -2.998
Carrington longitude 228.630 241.705 248.168 151.578 231.300 50.723
Carrington rotation number 2278.365 2278.329 2278.311 2278.579 2278.357 2277.859
Heliographic (HEEQ) longitude -13.074 0.000 6.463 -90.127 -10.405 169.018
Heliographic (HEEQ) latitude 2.437 0.622 -0.287 3.846 5.821 -2.998
HAE longitude 57.610 70.803 77.329 340.718 59.845 239.617
Earth Ecliptic (HEE) longitude -13.193 0.000 6.526 -90.085 -10.958 168.814
Earth Ecliptic (HEE) latitude 0.187 -0.000 -0.087 -3.378 3.869 -0.996
Roll from ecliptic north 0.801 0.759
Roll from solar north 7.696 8.008
Light travel time to Earth (min) 1.941 0.938 9.794 1.867 13.048
Separation angle with Earth 13.194 6.527 90.085 11.613 168.770
Separation angle A with B 19.721
Carrington rotation 2278 runs from 2023-11-24 14:35 (DOY 328.61) to
2023-12-21 22:16 (DOY 355.93), as seen from Earth.
Last Revised: Sunday, 03-Dec-2023 14:01:05 UTC
Responsible NASA Official: ![[email address: Therese.A.Kucera<at>nasa<dot>gov]](/img/kucera_email1.jpg)
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