This would mean, he said, "treat each launch as a first launch, each orbit as a first orbit, each re-entry as the first re-entry".
The tracklets of object images allow to extract exact positions for a first orbit determination.
He was given permission to go into a second orbit, during which he took an impromptu nap, a little bit of unscheduled audacity that delighted the team of experts at Canaveral.
The flight director, Christopher Kraft, followed the surgeon's advice to see if the problem would settle, and gave the go for a second orbit.
The decision to move to six orbits rather than seven was driven by the mission rules on contingency recovery operations; a seventh orbit would have required significant additional recovery forces to be able to reach the capsule anywhere on its trajectory within eighteen hours.
In Delta Ori A, two closely separated stars orbit around each other every 5.7 days, while a third star orbits this pair with a period of over 400 years.
A third planet, orbiting inside the other two, appears to have just twice the mass of our moon.
R Canis Majoris is another eclipsing binary that varies from magnitude 5.7 to 6.34 over 1.13 days, with a third star orbiting these two every 93 years.
Though it has been more than half a century since a human first orbited the Earth, there's still a lot we don't know about the effects of extended space travel.
YouTube is celebrating 50 years of human spaceflight with the premiere of an hour-and-a-half long video, First Orbit, that recreates, in real-time, Russian astronaut Yuri Gagarin's first 108-minute long orbit of Earth in 1961.
