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RE: (meteorobs) Correction Factor Formula
At 16:31 14-12-96 UT, you wrote:
>>Does anyone know what the magnitude correction factor formula is? I believe
>>the standard magnitude is +6.5.
>>
>>Jonathan
>>
>
>
> Correction for deviating Limiting magnitude (deviating from +6.5)
>
>C = r^6.5-lm
>
>Can you explain the formula, and and provide a sample?
>
>Jonathan
>
Hi Jonathan,
This was extensively discussed on meteorobs one or two weeks ago: check out
the earlier mail from a.o. Jim Richardson to which I was refering in my message.
In short, 'r' in the equation is the population index of the stream, which
is a measure of the distribution of the stream meteoroids over the magnitude
classes. a stream having r=~2.5 (e.g. the Perseids) means that for each
magnitude class going one magnitude fainter, the number of meteors increases
by a factor 2.5.
So if you observe 66 Perseids with Lm 6.1 in 1.0 hour, you correct it to
agree with a LM 6.5 sky by the formula:
c=2.5 ^6.5-6.1, or: 2.5^0.4.
Marco
PS: sorry that I don't go into much detail but after last night (Geminids) I
am very very tired.
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