US explorer catches images of asteroid marching across Tadpole
Nebula
NASA’s Wide-field Infrared Survey Explorer, or WISE, happened to
catch the image of an asteroid marching across Tadpole Nebula, the Jet
Laboratory (JPL) said on Thursday.
As WISE scanned the sky on a recent mission, it happened to catch the
asteroid in our solar system passing by, according to the JPL.
The asteroid, called 1719 Jens, left tracks across the image, seen as
a line of yellow-green dots in the boxes near center.
The asteroid, discovered in 1950, orbits in the main asteroid belt
between Mars and Jupiter. The space rock, which has a diameter of 19
kilometers (12 miles), rotates every 5.9 hours and orbits the sun every
4.3 years.
A second asteroid was also observed cruising by, as highlighted in
the boxes near the upper left (the larger boxes are blown-up versions of
the smaller ones), the JPL said.
But that’s not all that WISE caught in this busy image two satellites
orbiting above WISE streak through the image, appearing as faint green
trails.
The apparent motion of asteroids is slower than satellites because
asteroids are much more distant, and thus appear as dots that move from
one WISE frame to the next, rather than streaks in a single frame, said
the JPL.
This Tadpole region is chock full of stars as young as only a million
years old infants in stellar terms and masses over 10 times that of our
sun, the JPL said.
It is called the Tadpole nebula because the masses of hot, young
stars are blasting out ultraviolet radiation that has etched the gas
into two tadpole-shaped pillars, called Sim 129 and Sim 130.
These “tadpoles” appear as the yellow squiggles near the center of
the frame. The knotted regions at their heads are likely to contain new
young stars. WISE’s infrared vision is helping to ferret out hidden
stars such as these.
WISE is an all-sky survey, snapping pictures of the whole sky,
including everything from asteroids to stars to powerful, distant
galaxies.
Headquartered in Pasadena, Los Angeles, the JPL manages WISE for
NASA’s Science Mission Directorate in Washington D.C. Science operations
and data processing take place at the Infrared Processing and Analysis
Center at the California Institute of Technology in Pasadena.
LOS ANGELES, May 13 Xinhua
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