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originally posted by: Chadwickus
a reply to: egidio88
It's a timelapse image..
The asteroid Euphrosyne glides across a field of background stars in this time-lapse view from NASA's WISE spacecraft. WISE obtained the images used to create this view over a period of about a day around May 17, 2010, during which it observed the asteroid four times.
...The moving asteroid appears as a string of red dots because it is much cooler than the distant background stars. Stars have temperatures in the thousands of degrees, but the asteroid is cooler than room temperature. Thus the stars are represented by shorter wavelength (hotter) blue colors in this view, while the asteroid is shown in longer wavelength (cooler) reddish colors.
Aug. 3, 2015
A Mysterious Group of Asteroid Outcasts
High above the plane of our solar system, near the asteroid-rich abyss between Mars and Jupiter, scientists have found a unique family of space rocks. These interplanetary oddballs are the Euphrosyne (pronounced you-FROH-seh-nee) asteroids, and by any measure they have been distant, dark and mysterious -- until now. Distributed at the outer edge of the asteroid belt, the Euphrosynes have an unusual orbital path that juts well above the ecliptic, the equator of the solar system. The asteroid after which they are named, Euphrosyne -- for an ancient Greek goddess of mirth -- is about 156 miles (260 kilometers) across and is one of the 10 largest asteroids in the main belt. Current-day Euphrosyne is thought to be a remnant of a massive collision about 700 million years ago that formed the family of smaller asteroids bearing its name. Scientists think this event was one of the last great collisions in the solar system.
originally posted by: DaRAGE
Someone posted this in my thread about doom porn.
The part of google sky that used to be blacked out.
originally posted by: wildespace
a reply to: Wolfenz
It doesn't say anywhere in the article that they are looking at "10 mysterious asteroids". They say that the "asteroid after which they are named, Euphrosyne [...] is one of the 10 largest asteroids in the main belt."
Seems like a lot of people jumping the sensationalism gun, or criticising NASA, haven't read the article carefuly enough.
As a result of their study, the JPL researchers believe the Euphrosynes may be the source of some of the dark NEOs found to be on long, highly inclined orbits. They found that, through gravitational interactions with Saturn, Euphrosyne asteroids can evolve into NEOs over timescales of millions of years.
High above the plane of our solar system, near the asteroid-rich abyss between Mars and Jupiter, scientists have found a unique family of space rocks. These interplanetary oddballs are the Euphrosyne (pronounced you-FROH-seh-nee) asteroids, and by any measure they have been distant, dark and mysterious -- until now.
The 1,400 Euphrosyne asteroids studied by Masiero and his colleagues turned out to be large and dark, with highly inclined and elliptical orbits. These traits make them good candidates for the source of some of the dark NEOs the NEOWISE telescope detects and discovers, particularly those that also have highly inclined orbits.
"The Euphrosynes have a gentle resonance with the orbit of Saturn that slowly moves these objects, eventually turning some of them into NEOs," said Joseph Masiero, JPL's lead scientist on the Euphrosynes study. "This particular gravitational resonance tends to push some of the larger fragments of the Euphrosyne family into near-Earth space."
originally posted by: Chadwickus
a reply to: Staroth
Yes, they do know what they are.
Very slow trickle I guess, since the first asteroid was discovered in 1801
Fig. 1.— Proper orbital inclination vs proper semimajor axis for all asteroids in the outer Main Belt
(dots) and Euphrosyne family members (large squares). Colors indicate visible geometric albedo
following the colorbar. Vertical features are a result of weak resonances and a feature common
to synthetic proper orbital element catalogs. Horizontal features are asteroid families. Orbital
elements, albedos, and family identifications taken from Masiero et al. (2013).
originally posted by: Wolfenz
ahh Where is the Mysterious 9 others! ?
Asteroid families are named after the first asteroid discovered in that particular family (which tends to be the largest asteroid in the family, since larger objects are easier to find). So 31 Euphrosyne is the major asteroid in the Euphrosyne family.
a bit confusing as NASA says Euphrosynes is a Asteroid then NASA says its a Asteroid Family Group..
more likely a article error , as there is 1,400 in the Euphrosynes Group ,