Archive for November, 2014


 

28 Nov
2014
Marc Rayman
Marc Rayman
Chief Engineer/ Mission Director, JPL

Dawn Journal | November 28

by Marc Rayman
 

Dear Unidawntified Flying Objects,

Flying silently and smoothly through the main asteroid belt between Mars and Jupiter, Dawn emits a blue-green beam of high velocity xenon ions. On the opposite side of the sun from Earth, firing its uniquely efficient ion propulsion system, the distant adventurer is continuing to make good progress on its long trek from the giant protoplanet Vesta to dwarf planet Ceres.

This month, let’s look ahead to some upcoming activities. You can use the sun in December to locate Dawn in the sky, but before we describe that, let’s see how Dawn is looking ahead to Ceres, with plans to take pictures on the night of Dec. 1.

The robotic explorer’s sensors are complex devices that perform many sensitive measurements. To ensure they yield the best possible scientific data, their health must be carefully monitored and maintained, and they must be accurately calibrated. The sophisticated instruments are activated and tested occasionally, and all remain in excellent condition. One final calibration of the science camera is needed before arrival at Ceres. To accomplish it, the camera needs to take pictures of a target that appears just a few pixels across. The endless sky that surrounds our interplanetary traveler is full of stars, but those beautiful pinpoints of light, while easily detectable, are too small for this specialized measurement. But there is an object that just happens to be the right size. On Dec. 1, Ceres will be about nine pixels in diameter, nearly perfect for this calibration.

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17 Nov
2014

Dawn Soars at 2014 JPL Open House

by Dawn Education & Communications
 

Two days…
…200+ scientists and engineers…
…Live demonstrations…
…NASA’s thrilling space science.

What happens when people come together with a common mission to tell the stories of NASA and make it happen? 45,716 visitors traveled from afar to find out at the 2014 JPL Open House in Pasadena, California on October 11-12. The event, themed “Welcome to Our Universe,” invited visitors on a “ride” through the wonders of space. Highlights included a life-size model of the Curiosity rover and demonstrations from numerous space missions—including Dawn. Dawn visited giant asteroid Vesta from 2011 to 2012, and will arrive at dwarf planet Ceres in the spring of 2015. A 3-D print of protoplanet Vesta, gorgeous images, and an ion engine just like the one being used by Dawn to orbit its destinations helped the mission’s scientists and engineers tell the tale of the science, technology, engineering and mathematics (STEM) that drives the mission!

JPL Open house

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