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Originally posted by nasadude
I contacted one of the scientists who works in the Stereo project office and here is his reply:
"Stars and deep sky objects generally move from left to right in the images, since the STEREO spacecraft, like the earth, orbit the Sun counterclockwise as seen from north of the ecliptic plane. If you use the SECCHI star map tool at:
you will pribably agree that the object is either Beta Scorpii, or, if the map is off by a bit in hour angle, Alpha Scorpii (Antares), which actually looks more likely to me, since it appears to be south of the ecliptic (assuming we've got the roll angle right). Note that the images are aligned with solar north up, rather than aligned with ecliptic or celestial coordinates."