Re: Hard to say...
I don’t think it’s just lighting conditions, but I could be wrong. I saw it on NASA TV when they showed the roll out, on the picture I put on line, and on the test picture of the new ET camera, it looked yellow in all of them. I thought they have already used the new lightweight tank earlier this year, and they were orange. I haven’t heard NASA say anything about a change in color though. I did put in a question to their Ask The Expert site. Maybe they will answer that.