Starship Asterisk*

BMAONE23 wrote:Genetically speaking, humans and Chimpanzees are 98% similar and exhibit similar character traits.
Hey, hey we're the monkeys,
and people say we monkey around,
but we're to busy singing
to put anybody down

BMAONE23 wrote:Genetically speaking, humans and Chimpanzees are 98% similar and exhibit similar character traits.

P/2013 P5 is an asteroid (or main-belt comet)

The term 'main-belt comet' is a classification based on orbit and the presence of an extended morphology. It does not imply that these objects are comets or that the material surrounding their nuclei was ejected by the sublimation of volatiles, as on comets.

Seba wrote:Two main questions are: tails come from the ignition, or come from explosion? What substance is causing it?

deathfleer wrote:off topic.
Mr. Nuefer , etc,
I would be very pleased if you could verify these two photos:-
http://www.akhwatmuslimah.com/wp-conten ... crack1.jpg

and
http://www.akhwatmuslimah.com/wp-conten ... elah-1.jpg

thanks

Seba wrote:Hey,
Asteroid losing his material exposes more layers of its capacity.
Some rocks, for example: sulfur with friction can burn spectacular!
Our asteroid rotates and leaves tails like below film with fireworks, right?
Two main questions are: tails come from the ignition, or come from explosion? What substance is causing it??
And other questions resulting from this:
If we had a time-lapse sequence of Hubble would be clear .... can anyone have or know?
What is chemical composition of the explosive?
How explosive can be generally asteroids?

By the way, comparing the pictures you can see the difference in volume and shape of six tails (even rotation), or not?
....
thanks in advance for your help and explanations!


Anyway,
The basic composition of the fireworks is:
(...) an oxidant and combustible. Oxidizers are nitrates, chlorates, chromates and sulphates of potassium, barium, strontium, and calcium ammonium. The combustible materials are non-noble metals: magnesium, aluminum and zinc, nonmetals phosphorus, sulfur and carbon, iron sulfide, arsenic, antimony and hydrocarbons and carbohydrates. (...)
And, of course, Dyes and Binder.

JohnD wrote:
Neufer,

Your first link shows exactly what I mean! Completely different to the recnt APODs, and most relevant.

Your second shows a classic comet tail, driven by solar wind, not by ejection from the object, and so not relevant. IMHO.

DCStone wrote:

JohnD wrote:Quote "light pressure from the Sun is causing the asteroid to rotate increasingly rapidly, which in turn causes pools of previously gravity-bound dust to spin off"

Wouldn't that cause the tails to spiral, like the 'tails' of a Catherine wheel firework?

John

DC,
Only if the jets are constant in direction (relative to the asteroid's body) and intensity. More likely that these are variable in both, so you get a tumbling effect: "Houston, we are venting something into space"

Billsey wrote:Some have recently been postulating that "asteroids" might simply be "comets" that have lost their volatiles. Think about: you get a huge population of comets trapped in orbits that are entirely (or mostly) between the orbits of Jupiter and Mars, and it won't be long (on an astronomical scale) before they lose all their volatiles, leaving only rocky material behind.

Ron-Astro Pharmacist wrote:Did the HST do (or can it do) a spectra on the light from the ejected material to compare it to other objects of similar nature?

JohnD wrote:
Quote "light pressure from the Sun is causing the asteroid to rotate increasingly rapidly, which in turn causes pools of previously gravity-bound dust to spin off"

Wouldn't that cause the tails to spiral, like the 'tails' of a Catherine wheel firework?

Rothkko wrote:

http://en.wikipedia.org/wiki/Swastika:

<<Carl Sagan in his book Comet (1985) reproduces Han period Chinese manuscript (the Book of Silk, 2nd century BC) that shows comet tail varieties: most are variations on simple comet tails, but the last shows the comet nucleus with four bent arms extending from it, recalling a swastika. Sagan suggests that in antiquity a comet could have approached so close to Earth that the jets of gas streaming from it, bent by the comet's rotation, became visible, leading to the adoption of the swastika as a symbol across the world.>>

JohnD wrote:Quote "light pressure from the Sun is causing the asteroid to rotate increasingly rapidly, which in turn causes pools of previously gravity-bound dust to spin off"

Wouldn't that cause the tails to spiral, like the 'tails' of a Catherine wheel firework?

John