Sorry to self-reply, but this Q&A on "Space Overflow" about this specific star tracker is great: https://space.stackexchange.com/questions/43803/how-did-the-ca

Sorry to self-reply, but this Q&A on "Space Overflow" about this specific star tracker is great: https://space.stackexchange.com/questions/43803/how-did-the-canopus-star-tracker-work-are-there-any-still-out-there-in-service https://space.stackexchange.com/questions/43803/how-did-the-...