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RE: (meteorobs) Possible outburst March 1 2003
I think that in principle m-scatter is very suitable for recording this.
You only have to be where the radiant is (well) above horizon,
preferably quite high. Although I have not figured out the exact limits,
South America is suitable, the more southern (and western), the better.
Could be also recorded from New Zeland and South-Eastern Australia and
from South Africa (these with relatively low radiant). Of course
Antarctic would be fine, if there were an observer and a suitable
transmitter could be found.
(
For visual observations at the best places (for this) in the Antarctic,
the radiant is quite high, but the Sun only about 11 deg below horiozon
which is not bad either for the expected non-dim meteors. I far as I
know, there is near the best location (in Antarctic) at least one
Russian base, but hardly any interested observer(?)
)
Esko
>>>
what about radio echoes ? there is any chance ? where to fight ?
regards,
John ON4EU
----- Original Message -----
From: "Lyytinen Esko" <Esko.Lyytinen@MINEDU.FI>
To: <meteorobs@atmob.org>
Sent: Tuesday, February 18, 2003 2:13 PM
Subject: RE: (meteorobs) Possible outburst March 1 2003
>
>
> This is indeed considered very reliable as to the close encouter of
> the trail. The thing that may make this suspicious is the dimness of
> the parent comet as compared to the parent comets of Lyrids and
> Aurigids (known long period comet with showers and outbursts
> observed).
>
> The trail streching can be considered to be proportional to the
> semimajor-axis powered to 2.5. With this comet it is about 100, that
> is ten times bigger than with the Leonids, so the trail is about 300
> times more streched than a 1-rev. Leonid-trail, making it less dense
> by about that much. Because of quite central (about 10000km, inside
> the Earth
> orbit) and 1-rev and high inclination, the outburst width (in time) is
> expected to be very small maybe only about ten minutes the strongest
> phase (might be even shorter). The meteors are expected to be
relatively
> bright, probably mostly NOT real fire-balls (there may well be those
> among) but not dim either. Because of the brief observing period, even
> possible moderate rates may not give many meteors.
> Don't expect a storm. Because of the strecthing by long period, a stom
> level is very very improbable.
>
>
> It is impossible to give any rates-prediction, but if one tries to
> observe, I recommend to try to get an as wide a coverage as possible
> even close to horizon, for the short time interval. The timing is
> expected to be accurate to 15 minutes or probably even better, but be
> ready for a possible little more error in the timing. The radiant is
> above horizon also in South Africa, but about only ten degrees, I
> recall. Radio M-scatter observers in the South are adviced to keep
> their receivers ready.
>
> I hope that something will be observed.
>
> Esko
>
> >>>
>
> Among the possible outbursts mentioned in the article by
> Lyytinen/Jenniskens there is an entry for March 1, 2003. The outburst
> is related to particles from comet C/1976 D1.
>
> The radiant should be at RA 013, Dec -64 (only visible from the
> southern
> hemisphere) and the predicted time is 2003/03/01 21:54 UT (340.861
> J2000).
>
> The entry is listed in bold which means it is one of 'the more certain
> predictions'.
>
> There will be no lunar interference.
>
> I took a quick look and it seems that South America might be the most
> suitable place for observations, balancing darkness and radiant
> altitude.
>
> Daniel
>
>
>
>
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