Dawn – Slugger O'Toole

Dawn over Ceres

Pete Baker on March 8, 2015, 7:16 pm

| Readers 399

On Friday afternoon [GMT], ahead of Ireland cricketers’ epic encounter with Zimbabwe, Nasa’s Dawn spacecraft became the first man-made object to go into orbit around a dwarf planet – Ceres, at 950km across, the largest object in the main asteroid belt. [Image credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA] From the associated text The slim crescent of Ceres smiles back as the dwarf planet awaits the arrival of an emissary from Earth. This image was taken by NASA’s Dawn spacecraft on March 1, 2015, just a few …

Vesta: “arguably the oldest extant primordial surface in the Solar System”

Pete Baker on July 19, 2011, 3:32 pm

| Readers 9

With Dawn now safely in orbit around the giant asteroid Vesta, Nasa have released the first close-up image of the ancient protoplanet. [Image credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA] From the accompanying text July 18, 2011 – PASADENA, Calif. — NASA’s Dawn spacecraft obtained this image with its framing camera on July 17, 2011. It was taken from a distance of about 9,500 miles (15,000 kilometers) away from the protoplanet Vesta. Each pixel in the image corresponds to roughly 0.88 miles (1.4 kilometers). And from the …

Dawn: Up close and personal with Vesta

Pete Baker on July 15, 2011, 8:08 pm

| Readers 2

As I may have mentioned, early tomorrow morning, 9am [BST] 16 July, Nasa’s Dawn spacecraft is expected to be captured into orbit by the 530km-wide giant asteroid Vesta. They won’t know for sure until a scheduled communications pass at 8.30am [BST] on Sunday 17 July. Here’s the latest image of Vesta taken by Dawn on 9 July at a distance of about 26,000 miles (41,000 km). NASA’s Dawn spacecraft obtained this image with its framing camera on July 9, …

“this is probably the biggest known asteroid to have come this close.”

Pete Baker on June 27, 2011, 5:35 pm

| Readers 2

As spotted by SpaceWeather. At about 1700 UT (6pm BST) today Asteroid 2011MD will fly past only 12,300 kilometers (7,600 miles) above the Earth’s surface. [Image credit NASA/JPL] As the diagram shows, that’s close enough to be affected by Earth’s gravity. This small asteroid, only 5-20 meters in diameter, is in a very Earth-like orbit about the Sun, but an orbital analysis indicates there is no chance it will actually strike Earth on Monday. The incoming trajectory leg passes several thousand kilometers …

Herschel’s anniversary and Dawn’s destinations

Pete Baker on May 7, 2010, 10:19 pm

| Readers 5

As I mentioned when noting a previous wondrous image, ESA’s cool infrared Herschel observatory sent its first images back in October last year, just after its launch companion, the even cooler Planck observatory achieved first light. Both are twittering away – Planck and Herschel. And ESA have released another stunning image as Herschel nears its first anniversary in orbit. There’s also an ESA video to mark the anniversary The BBC’s Spaceman, Jonathan Amos, has been contemplating Herschel’s images. He recommends the …