(meteorobs) Origin of ZHR?

[meteors at eclipse.net]

Julian,

>From what I've been able to determine, Opik, Porter, and Oliver all
addressed parts of the issue, so maybe Sedgwick is the one who put it all
together. I'll check my County Libtary for the bood.

Is there a copy of the formula?

Wayne


> Rich,
>
> If you have a copy of Sedgwick's, "Observational Astronomy for Amateurs,"
> either the 1955/1957 edition or the fourth edition there is a reference to
> Meteor Counts and Hourly Rates in Section 15.5 and to Zenithal Hourly
> Rate, and Zenithal Magnitude in Section 15.6 and a Bibliography for E.
> Opik, J.G. Porter, C.P. Oliver, et. al. who researched this area.  From
> the Bibliography the dates I see referred to are 1920, 1921, 1923, 1930,
> 1931.  These cites are from the Harvard Circ. and ``Journal of the British
> Astronomical Association among others.  There is also mentioned in Section
> 15.5 statistical work in the mid-nineteenth century by a Gravier and
> Schmidt.  Whatever that statistical work is I do not know.  Sounds like a
> trip to the library.
>
> Hope this helps.
>
> Julian Parks
> Rego Park, NY
>
> ----- Original Message -----
> From: "Richard Taibi" <rjtaibi at hotmail.com>
> To: <meteorobs at meteorobs.org>
> Sent: Friday, May 11, 2007 9:02 PM
> Subject: (meteorobs) Origin of ZHR?
>
>
>> Does anyone know who developed the concept of the Zenithal Hourly Rate,
>> and
>> when it was proposed?
>>
>> Thanks!
>>
>> Rich
>>
>>
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