(meteorobs) meteorobs Digest, Vol 10, Issue 11
OONA1960 at aol.com
OONA1960 at aol.com
Wed Jul 9 01:53:18 EDT 2008
ED-- NICE IMAGE!
THANKS FOR SHARING.
HEADS UP,OONA
In a message dated 7/8/2008 8:03:01 P.M. Eastern Daylight Time,
meteorobs-request at meteorobs.org writes:
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Today's Topics:
1. HALWA obs at NJAA Obs July 2-3 2008 (meteoreye at comcast.net)
2. Ist Light...and it's hot! (stange)
3. Re: Ist Light...and it's hot! (meteoreye at comcast.net)
4. Re: Ist Light...and it's hot! (stange)
5. Re: Ist Light...and it's hot! (meteoreye at comcast.net)
6. Re: Talking clocks (bob71741)
7. Re: Talking clocks (meteoreye at comcast.net)
8. Re: Ist Light...and it's hot! (Chris Peterson)
9. Re: Ist Light...and it's hot! (stange)
----------------------------------------------------------------------
Message: 1
Date: Tue, 08 Jul 2008 20:41:10 +0000
From: meteoreye at comcast.net
Subject: (meteorobs) HALWA obs at NJAA Obs July 2-3 2008
To: meteorobs at meteorobs.org (meteorobs)
Message-ID:
<070820082041.10174.4873D0E6000D8732000027BE22155558840A970A9D010A9B0A03 at comca
st.net>
Content-Type: text/plain
A fair two hours at the NJAA Observatory
40d40m52s N, 74d53m54s W
EDT Date July 3
UT Date July 3
UT Time 0500-0708 F=1.00
IMO Showers, RA, Dec, Vel
ANT 294 -20 v30
CAP 283 -16 v23
Non IMO Showers (reported to IMO as SPO)
JPI 015 +26 v61 (Sirko Molau Shower # 13)
JAD 027 +45 v56 (Sirko Molau Shower # 18)
SCU 282 -03 v18 (IAU Shower)
TAQ 340 -12 v64 (IAU Shower)
Time FOV Teff LM ANT CAP JPI JAD SCU TAQ SPO TOT Met/Hr
0500-0604 1.013 +5.50 1 0 1 0 0 0 2
4 3.9
0604-0708 1.020 +5.47 0 0 0 1 0 0 3
4 3.9
--------------------------
0500-0708 2.033 +5.48 1 0 1 1 0 0 5 8
3.9
Totals: 2.033 Teff, 8 Meteors, avg Mag +2.56
1 Ant (0.5/Hr) Mag +3
1 JPI (0.5/Hr) Mag +2
1 JAD (0.5/Hr) Mag 0
5 SPO (2.4/Hr) Avg Mag +3.1
All meteors plotted, actual plot times from audio tape used to determine
Teff.
Alignment cord used for all plots, all meteor times recorded to nearest
minute.
Also looked for Sirko Molau's CAP position (sh 20 RA 290,dec -15)- None seen
Sporadics examined for:
SM sh 13, JPI (015,+26, V= 61 kps) one seen during first period, Mag +2.
SM sh 18, JAD (027, +45 V=56 kps) one seen during second period Mag 0.
IAU shower SCU (282, -2.5, v18) None seen
IAU SHower TAQ (340, -11.5, v64) None seen
Lots of Lighning Bugs, they're really annoying.
5 Satellites, including one with 4 bright +1 flashes.
Wayne
------------------------------
Message: 2
Date: Tue, 8 Jul 2008 14:21:50 -0700
From: "stange" <stange34 at sbcglobal.net>
Subject: (meteorobs) Ist Light...and it's hot!
To: <meteorobs at meteorobs.org>
Message-ID: <000301c8e140$a44dd560$0e4d204b at NAMELESSONE>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Received from Ed Majden.... Molten mass approaches earth.
http://www.geocities.com/stange34@sbcglobal.net/edfireball
YCSentinel
------------------------------
Message: 3
Date: Tue, 08 Jul 2008 21:33:38 +0000
From: meteoreye at comcast.net
Subject: Re: (meteorobs) Ist Light...and it's hot!
To: Global Meteor Observing Forum <meteorobs at meteorobs.org>
Message-ID:
<070820082133.21487.4873DD3200047B4C000053EF22120207840A970A9D0
10A9B0A03 at comcast.net>
Content-Type: text/plain
.... Molten mass approaches earth.
Must admit I don't understand this headline....
MW
------------------------------
Message: 4
Date: Tue, 8 Jul 2008 14:56:37 -0700
From: "stange" <stange34 at sbcglobal.net>
Subject: Re: (meteorobs) Ist Light...and it's hot!
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Message-ID: <000601c8e145$7fc4b510$0e4d204b at NAMELESSONE>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
An effect of ram-air pressure heating the surface and interior of a mass
however small, in a high velocity approach from outer space into the earths
upper atmosphere.
A VERY nice first capture shown as a composite image of meteor ablation
which is bright enough to be described as a fireball.
Wish it had been my capture. -YCS
----- Original Message -----
From: <meteoreye at comcast.net>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/07/08 14:33
Subject: Re: (meteorobs) Ist Light...and it's hot!
>
>
> .... Molten mass approaches earth.
>
> Must admit I don't understand this headline....
> MW
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
------------------------------
Message: 5
Date: Tue, 08 Jul 2008 22:05:19 +0000
From: meteoreye at comcast.net
Subject: Re: (meteorobs) Ist Light...and it's hot!
To: Global Meteor Observing Forum <meteorobs at meteorobs.org>
Message-ID:
<070820082205.26575.4873E49F00019701000067CF22120207840A970A9D010A9B0A03 at comca
st.net>
Content-Type: text/plain
That's what I didn't like. The term "Molten Mass" is typical of the hyped
headlines of the MainStream Media. We all know (or should know) that almost all
of the mass is solid, not molten. Most likely, if it's a meteorite dropping
fireball (which is of course not known) the center never gets molten.
Otherwise it is vaporized, possible even through sublimation.
Sorry to be picky, but the scientifically ignorant media and I have been
rasslin' a bit lately, so I hate to see inaccurate headlines attached to events.
In any case, great image!! If that's first light, we should all be so lucky!
Wayne
-------------- Original message --------------
From: "stange" <stange34 at sbcglobal.net>
> An effect of ram-air pressure heating the surface and interior of a mass
> however small, in a high velocity approach from outer space into the
earths
> upper atmosphere.
>
> A VERY nice first capture shown as a composite image of meteor ablation
> which is bright enough to be described as a fireball.
>
> Wish it had been my capture. -YCS
>
> ----- Original Message -----
> From:
> To: "Global Meteor Observing Forum"
> Sent: 2008/07/08 14:33
> Subject: Re: (meteorobs) Ist Light...and it's hot!
>
>
> >
> >
> > .... Molten mass approaches earth.
> >
> > Must admit I don't understand this headline....
> > MW
> > _______________________________________________
> > Mailing list meteorobs: meteorobs at meteorobs.org
> > To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> > http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
------------------------------
Message: 6
Date: Tue, 08 Jul 2008 22:07:49 -0000
From: "bob71741" <bob71741 at yahoo.com>
Subject: Re: (meteorobs) Talking clocks
To: Global Meteor Observing Forum <meteorobs at meteorobs.org>
Message-ID: <g50ofl+65vn at eGroups.com>
Content-Type: text/plain; charset="ISO-8859-1"
A few months back someone on this forum needed a new tape recorder,
and he was directed by another to try a digital voice recorder; an RCA
RP5022B at a low price of $25US.
Well I bought one, for another purpose, and its great; The unit keeps
good time, and every voice entry is time stamped down to the second.
Sounds ideal for meteor records; you can describe the situation with
out worrying about the time because the file is time stamped.
This was a few months ago (8 or 9?), so there are many other voice
recorders out there now to choose from.
Best Regards
Bob
--- In meteorobs at yahoogroups.com, Francisco Oca?a <albireo3000 at ...> wrote:
>
> stange escribi?:
> > A number of possibilities exist.
> >
> > 1) Talking clock software(many free), for a laptop?
> >
> Thanks YCSentinel, I think I will use a laptop or a palm, although
> batteries give always problems
> > 2) Talking clocks similar to older Sharp CT-660E, Radio Shack, or
newer
> > talking clocks under $10 for example:
> >
http://www.amazon.com/Big-Mouth-Talking-Alarm-Clock/dp/B000X8N0W4/ref=cm_cr_pr
_sims_t/103-9234421-1512648
> > 3) Or digital radio frequencies at 5, 10, 20 Mhz in North America
> >
> > YCSentinel
> >
> >
> Thank you all!
>
> Paco
>
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at ...
> To UNSUBSCRIBE, email: owner-meteorobs at ...
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
------------------------------
Message: 7
Date: Tue, 08 Jul 2008 22:10:51 +0000
From: meteoreye at comcast.net
Subject: Re: (meteorobs) Talking clocks
To: Global Meteor Observing Forum <meteorobs at meteorobs.org>
Message-ID:
<070820082210.13249.4873E5EB0007FCB5000033C122120207840A970A9D010A9B0A03 at comca
st.net>
Content-Type: text/plain
How much time can it record?
-------------- Original message --------------
From: "bob71741" <bob71741 at yahoo.com>
> A few months back someone on this forum needed a new tape recorder,
> and he was directed by another to try a digital voice recorder; an RCA
> RP5022B at a low price of $25US.
>
> Well I bought one, for another purpose, and its great; The unit keeps
> good time, and every voice entry is time stamped down to the second.
> Sounds ideal for meteor records; you can describe the situation with
> out worrying about the time because the file is time stamped.
>
> This was a few months ago (8 or 9?), so there are many other voice
> recorders out there now to choose from.
>
> Best Regards
> Bob
>
> --- In meteorobs at yahoogroups.com, Francisco Ocaña wrote:
> >
> > stange escribió:
> > > A number of possibilities exist.
> > >
> > > 1) Talking clock software(many free), for a laptopç
> > >
> > Thanks YCSentinel, I think I will use a laptop or a palm, although
> > batteries give always problems
> > > 2) Talking clocks similar to older Sharp CT-660E, Radio Shack, or
> newer
> > > talking clocks under $10 for example:
> > >
>
http://www.amazon.com/Big-Mouth-Talking-Alarm-Clock/dp/B000X8N0W4/ref=cm_cr_pr_s
> ims_t/103-9234421-1512648
> > > 3) Or digital radio frequencies at 5, 10, 20 Mhz in North America
> > >
> > > YCSentinel
> > >
> > >
> > Thank you all!
> >
> > Paco
> >
> >
> > _______________________________________________
> > Mailing list meteorobs: meteorobs at ...
> > To UNSUBSCRIBE, email: owner-meteorobs at ...
> > http://lists.meteorobs.org/mailman/listinfo/meteorobs
> >
>
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
------------------------------
Message: 8
Date: Tue, 8 Jul 2008 16:47:27 -0600
From: "Chris Peterson" <clp at alumni.caltech.edu>
Subject: Re: (meteorobs) Ist Light...and it's hot!
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Message-ID: <028001c8e14c$a4f01260$0a01a8c0 at bellatrix>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Larry-
This fireball is probably large enough that ram pressure is responsible for
its heating, but that isn't always the case. For a mass smaller than a few
millimeters (which can still produce a significant fireball), it isn't ram
pressure that produces heating but collisions with air molecules. This is a
direct consequence of the small size of the object with respect to the
rather large mean free path at high altitudes. Below a certain size, an
object can't maintain a volume of compressed air in front of it.
In any case, there's no "molten mass" here. At any point along the path, the
average temperature of the mass is barely above what it was before it
encountered the atmosphere, most likely below freezing.
It's a nice fireball, about what an allsky camera should record once every
week or two.
Chris
*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
----- Original Message -----
From: "stange" <stange34 at sbcglobal.net>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: Tuesday, July 08, 2008 3:56 PM
Subject: Re: (meteorobs) Ist Light...and it's hot!
> An effect of ram-air pressure heating the surface and interior of a mass
> however small, in a high velocity approach from outer space into the
> earths
> upper atmosphere.
>
> A VERY nice first capture shown as a composite image of meteor ablation
> which is bright enough to be described as a fireball.
>
> Wish it had been my capture. -YCS
------------------------------
Message: 9
Date: Tue, 8 Jul 2008 17:00:42 -0700
From: "stange" <stange34 at sbcglobal.net>
Subject: Re: (meteorobs) Ist Light...and it's hot!
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Message-ID: <001d01c8e156$d5238110$0e4d204b at NAMELESSONE>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hello Chris,
Interesting, the two types of ablation yielding light & heat. I have not
taken the time to read the collision theory. I suppose it is the raising of
K & L shell electrons to a higher state of energy, (K shell can total 2) (L
shell can total 6) since it is primarily Hydrogen(H1 & N7) involved which
upon return to their lower state emminate energy in the form of heat & light
for the collision types.
My understanding of the ram-pressure ablation is that there is a thin zone
between the ram pressure heating zone and the meteoritic material which is
of a (much slower velocity), removing the heated (molten) meteoritic
material layer by layer.similar to a flow of hot gasses streaming around and
off the frontal area of the meteor during its flight. The inside temperature
is unknown to me, and I accept (your) cool interior because of the enormous
velocity of the object and the short period of flight.
Then, jumping ahead a bit, I suppose after ram-pressure & ablation of the
larger mass, has made a progressively smaller mass, it would perform a
transition to a collision phase of light & heat?
Larry
YCS
----- Original Message -----
From: "Chris Peterson" <clp at alumni.caltech.edu>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/07/08 15:47
Subject: Re: (meteorobs) Ist Light...and it's hot!
> Hi Larry-
>
> This fireball is probably large enough that ram pressure is responsible
> for
> its heating, but that isn't always the case. For a mass smaller than a few
> millimeters (which can still produce a significant fireball), it isn't ram
> pressure that produces heating but collisions with air molecules. This is
> a
> direct consequence of the small size of the object with respect to the
> rather large mean free path at high altitudes. Below a certain size, an
> object can't maintain a volume of compressed air in front of it.
>
> In any case, there's no "molten mass" here. At any point along the path,
> the
> average temperature of the mass is barely above what it was before it
> encountered the atmosphere, most likely below freezing.
>
> It's a nice fireball, about what an allsky camera should record once every
> week or two.
>
> Chris
>
> *****************************************
> Chris L Peterson
> Cloudbait Observatory
> http://www.cloudbait.com
>
>
> ----- Original Message -----
> From: "stange" <stange34 at sbcglobal.net>
> To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
> Sent: Tuesday, July 08, 2008 3:56 PM
> Subject: Re: (meteorobs) Ist Light...and it's hot!
>
>
>> An effect of ram-air pressure heating the surface and interior of a mass
>> however small, in a high velocity approach from outer space into the
>> earths
>> upper atmosphere.
>>
>> A VERY nice first capture shown as a composite image of meteor ablation
>> which is bright enough to be described as a fireball.
>>
>> Wish it had been my capture. -YCS
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
------------------------------
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End of meteorobs Digest, Vol 10, Issue 11
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