Asteroids

[viscount aero]

my apologies:

http://www.sciencedaily.com/releases/20 ... 140527.htm

Thanks.

They're still hung up on collision only/impactor only derivation of meteorites but at least they're learning someting new (to them) And they never mentioned comets in the article. They're still years away from evolving, being reliant only what their biased computer models tell them about "core accretion" theory...

[CosmicLettuce]

The Active Asteroids

Some asteroids eject dust, producing transient, comet-like comae and tails; these are the active asteroids. The causes of activity in this newly-identified population are many and varied. They include impact ejection and disruption, rotational instabilities, electrostatic repulsion, radiation pressure sweeping, dehydration stresses and thermal fracture, in addition to the sublimation of asteroidal ice. These processes were either unsuspected or thought to lie beyond the realm of observation before the discovery of asteroid activity. Scientific interest in the active asteroids lies in their promise to open new avenues into the direct study of asteroid destruction, the production of interplanetary debris, the abundance of asteroid ice and the origin of terrestrial planet volatiles.

http://arxiv.org/abs/1502.02361

Peace, CL

[dougettinger]

Sharper NASA images by the space probe are coming into view for the largest asteroid Ceres. The images reveal numerous anomalous bright spots, which could be possible arcing and jetting like is seen on various comets. Also, many craters on its limb are depicted as tetrahedral shapes.

Do any forum members have any commentary about these recent findings? Why would Ceres develop a voltage potential between its surface and the solar wind environment to develop arcing? Ceres occupies a stable orbit where the solar wind density should be fairly constant. Perhaps nearby smaller asteroids and dust particles are becoming highly ionized due to a recent CME that may have been oriented in Ceres direction.

Doug Ettinger
Spaceship Rider

[D_Archer]

A look at 3200 Phaethon: A big, bizarre, blue asteroid we plan to visit:
https://www.cnet.com/news/a-look-at-320 ... -to-visit/

New research suggests the "rock comet" is weirder than previously thought.

-Not weird if you have a correct theory about asteroids and comets (ie there are only asteroids, comets are asteroids that electrically discharge, asteroids can have varied compositions depending from which parent body they originated, they are planet debris)

It's a weird blue asteroid that created the Geminids and gets so hot that metals on the surface turn to goo,Teddy Kareta

- metals to goo, maybe Teddy, maybe, need to visit the asteroid first. If metal maybe it is blue because it has an oxide layer, oxide layers are caused by electricity...

odd asteroid, which sometimes behaves like a comet by releasing a dusty tail when it passes close to the sun

- a hint

He says they found it to be even more enigmatic than expected.

they discovered Phaethon is darker with a more uniform surface than previously though

-Sure, and they will find many more surprises.
---

Too bad the new mission only gets there in 2025.

Anybody else has predictions or ideas about this asteroid.

Regards,
Daniel

[nick c]

An asteroid that behaves like a comet! So it is an asteroid on a highly eccentric orbit.
https://www.space.com/42236-weird-blue- ... source=not

[D_Archer]

An asteroid that behaves like a comet! So it is an asteroid on an highly eccentric orbit.
https://www.space.com/42236-weird-blue- ... source=not

Thx Nick that is a longer article.

it's been cooked through and turned off and it just looks like a rock

Yes ,it was a cometary asteroid when electrically active; when it is not, it is 'just' an asteroid.

Regards,
Daniel