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Originally posted by halfmask
First I thought a meteor or meteorite but it did not have long tale only a very short tail.
1. METEOR WAKE
A luminosity just behind the meteor. It moves with the meteor
and forms a kind of tail. The wake is often present in bright
fireballs, which are then sometimes described as a comet-like objects
by the witnesses. In this sense, the meteor can be described as
consisting of meteor head and meteor wake. At a given position,
the wake duration is only a fraction of second.
The spectrum of meteor wake is different from the spectrum of meteor
head. The wake spectrum consists chiefly from low excitation lines.
Typical lines belong to Na I, Fe I, Mg I, Ca I, i.e. to the atoms
released from the meteoroid.
After a meteoroid fragmentation, small fragments decelerate more
rapidly and stay behind the main body. They may look like a wake of the
main body but this is not a true head+wake, rather a multiple meteor
with similar spectra in all parts.
2. SHORT-DURATION METEOR TRAINS (OR TRAILS)
Luminous trains left behind the meteor for up to about 3 seconds. They are
often observed visually and by video techniques in fast
meteors like Perseids. They are present also in faint meteors, of
magnitude +4 or so. In fact the ratio of the train/meteor brightness is
larger in faint meteors than in bright meteors. The train is not
connected with the meteor. In fact, it forms at a given position
with some delay after the meteor passage. The the train is also
considerably shifted to higher altitudes than the meteor which produced
it.
The short-duration trains are formed by only one spectral line,
the green auroral lines of neutral atomic oxygen at 5577 A. This
is a forbidden line. The luminosity is produced (very probably) by
the atmospheric oxygen.
Originally posted by halfmask
It was also going straight up not down, and not up on an angle. I am not sure, but considered that it could be a meteorite or object in high orbit going really fast and that she was just at the right angle to be looking at it for it to appear to be going straight up and the cloud cover stopped her from seeing it arc down after it passed above her, but I don't know if such an orbit or angle is possible.
>
-=-------
Jun,
If I understand your description correctly, it sounds like you are describing
what I call an earth grazer...a meteor that has it's radiant right at or just
below the horizon can do this...the meteor usually appears quite long.
George Z.
from Wiki
The visible light produced by a meteor may take on various hues, depending on the chemical composition of the meteoroid, and its speed through the atmosphere. As layers of the meteoroid are stripped off and ionized, the color of the light emitted may change according to the layering of minerals. Some of the possible colors and the compounds responsible for them are: orange/yellow (sodium); yellow (iron); blue/green (copper); purple (potassium); and red (silicate).
Originally posted by LongbottomLeaf
reply to post by halfmask
I'm not in Canada.,But Tonight there was a HUGE orange light in the sky in Phoenix Arizona. The light was stationary with another smaller black ball next to it with white light coming out of the black ball. It was the color of the sun setting. It must have stayed still for about 30 minutes then went out and then came back on then they both Then they both disappeared. I feel like a jack ass because I was at walmart and didnt have a camera. I would have left to get a cam and take pics for proof. It was more important for me to stay and watch it and prove it to myself. I dont care if no one believe me I know what I saw.
Originally posted by LongbottomLeaf
reply to post by halfmask
I'm not in Canada.,But Tonight there was a HUGE orange light in the sky in Phoenix Arizona. The light was stationary with another smaller black ball next to it with white light coming out of the black ball. It was the color of the sun setting. It must have stayed still for about 30 minutes then went out and then came back on then they both Then they both disappeared. I feel like a jack ass because I was at walmart and didnt have a camera. I would have left to get a cam and take pics for proof. It was more important for me to stay and watch it and prove it to myself. I dont care if no one believe me I know what I saw.
Originally posted by C.H.U.D.
As for the colours, yes, meteors, especially brighter meteors, can often have vivid colours, but it's not quite as simple as composition of the meteoroid alone, as I explained in this thread here a few weeks back. The green color you saw was most likely due to the OIII forbidden emission line of atmospheric Oxygen (see below). Copper is not generally found in meteorites or in the spectral emission lines of meteors as far as I'm aware.
I don't believe there is much evidence to support the idea that meteor
color (as seen with the eye) has much relationship to the meteoroid
composition- at least, when we are talking about fireballs. There is good evidence, however, that the color is mainly the from ionization of atmospheric gas- especially oxygen. I've personally collected images of
several bright fireballs through a 501 nm narrow band (6 nm) filter,
which argues for a very strong [OIII] component to the light.
FWIW, a quick review of the meteor reports (nearly all fireballs) I've
received in the last 11 years shows this:
9110 reports total
3735 (41%) report some sort of color
3069 (82% of those reporting color) report some shade of green
I've long since concluded that bright fireballs are almost always green.
The exceptional cases are those which are not (and these are almost
always reported as white).
The only other color that tends to show up in witness descriptions is
red/orange, and a close look reveals that this is almost always at the
end of the path, when it is easily explained as the output of a cooling
blackbody radiator.
Chris
*******************************
Chris L Peterson
Cloudbait Observatory
Source: METEOROBS (The Meteor Observing mailing list)
Try this google search for lots of reading on the subject.