Top photo: the first picture and magnification. I circled in red the location of the “Thing” white.
Click on link below to enlarge top photo – https://www.ufodigest.com/sites/default/files/field/image/Opportunity-SOL-123-1-LARGE-jpg.jpg#overlay-context=article/ghost-or-angel-mars
Above, the second picture and magnification. The “Thing” is slightly turned white, and high environmental slightly higher.
Above, the “Thing” is still turned white, and has taken a lower position.
See the photo series Panoramic Camera SOL 123, taken by the robot on Mars NASA ground “Opportunity”. This is the official website of NASA. Photos of interest are the first six from the top:
MARS ANOMALY:
Many more photos and anomalies at Christian’s website: http://ovniparanormal.over-blog.com/