Secret X-37B Space Plane Spotted by Amateur Skywatchers
Thanks to a worldwide eyes-on-the-sky network of amateurs, the secret X-37B spacecraft is reportedly in a 39.99 degrees inclination, circling the Earth in an orbit 401 kilometers by 422 kilometers. This data may change slightly as the vehicle's orbit is better refined, said Greg Roberts of Cape Town, South Africa, a pioneer in using telescopic video cameras to track spacecraft, chalking up exceptional results over the years.
Quote from the article:
Source: Secret X-37B Space Plane Spotted by Amateur Skywatchers
Quote from the article:
Roberts said that those sighting the craft have "absolute confidence" in their observations, claiming no chance of it being anything else. "The fact that we have now seen it several times confirms that the orbit we have is very close to the real orbit -- perhaps an error of a few kilometers or so at most," he told SPACE.com. "One of our North American members got a brief view of what was suspected to be the space plane under somewhat difficult circumstances before it was no longer visible in the evening sky from the United States," Roberts said. That single observation was not enough to define the spacecraft's inclination as the skywatcher used binoculars, Roberts added. Video observers of the sky get "traces" when they record the object of interest, he continued, so it's possible to determine the angle of travel and hence an idea of the inclination. Roberts said the space plane has been observed over the last week by several members and its orbit is properly tied down. "We now face a spell of a week to two weeks when there will be no optical visibility until it becomes a morning object in the southern hemisphere and an evening object in the northern hemisphere." The degree of difficulty in finding the X-37B has been a product of not knowing its inclination and having limited optical visibility due to its low orbiting altitude. [How to Spot Satellites] "This means it spends most of its time in Earth's shadow during a pass," Roberts said. Also the ship's low inclination and altitude has meant that tracking has only been possible from mid-latitude, ruling out observations by some of the members of the team unless they are in position at very low elevations. According to Ted Molczan, a leader in the satellite sleuthing business based in Toronto, the X-37B search was moderately challenging. "It was the first launch of its kind, so we had only a rough idea of its altitude, inclination and plane. Its low altitude and inclination put it out of reach of several of our most skilled observers," he told SPACE.com. |
Source: Secret X-37B Space Plane Spotted by Amateur Skywatchers
