[meteorite-list] meteoroid temperature Results (P. I)

[MexicoDoug at aol.com]

En un mensaje con fecha 01/06/2005 11:27:43 AM  Mexico Standard Time, 
lbp at privat.tdcadsl.dk escribe:

>What is the  temperature of a meteoroid drifting thrue space ?
>Is it too small to  absorb radiation-energi from the sun ?

Hi Lars, I'm breaking this email  in three chapters, first the results, and 
the second and third parts will be  assumptions and most discussion.

Part I

There is no minimum size  to absorb energy from the Sun, even a molecule can 
do it - heat of everything is  actually principally caused by molecular 
vibrational motion in the Infrared  range under normal circumstances - molecular 
vibrations.  So that answers  the easy question.

On the temperature of a meteoroid traveling in space,  that is a complicated 
question because the question is really millions of  questions in one 
depending on what temperature you mean - and where you measure  it.

But I think I can give a shot at a satisfying at everything you  wanted to 
know on the first question and weren't afraid to ask, with the  following 
calculations you kept me awake doing.  You can make a lot of  interesting 
observations here.  I'd add a Eucrite and an Enstatite  Achondrite, which I expect the 
former would not be closer to OC, and the later  more on the way to the irons.  
I guess:)

Distance Energy flux  <-------T (degrees C)-------->     T(Planet av. Surf.)  
AU  W/m2  CC OC Fe-Ni "ideal" note   
0.31   14,214 216 195 378 227 Mercury (p) 167 
0.47  6,184  124 107 255  133 Mercury (ap) 167 
0.72  2,635  48 34 154 55 Venus  464  
1.00  1,366  -1 -12 89 6 Earth  15 
1.52  591   -52 -62 21 -47 Mars  -63 
2.80  174  -110 -117 -57  -107   
3.00  152  -116 -123 -64 -112    
4.00  85  -137 -143 -92 -134   
5.00  55   -151 -156 -111 -148   
5.2   51  -154 -159  -114 -151 Jupiter  -144 
9.5   15  -185 -188 -155  -183 Saturn  -176 
19.2   3.7  -211 -214 -190 -209  Uranus  -215 
29.7   1.5  -223 -225 -207 -222 Pluto  (p) -223 
30.1   1.5  -223 -226 -207 -222 Neptune   -215 
49.3   0.6  -234 -236 -221 -233 Pluto (ap)  -223  Kuiper, Comets (ap)
50K 0.000001  -272 -272 -271  -272   Oort Cloud

(Table may not display well in text, but if  you copy it into excel and use 
text-to-columns it should look  great.)
Proximamente: Assumptions