[AZ-Observing] Re: Comet Lulin this morning

Sounds like something that would require the use of a slide rule!
    ;  ]

Wayne Westlake

On Thu, Feb 26, 2009 at 3:01 PM, Richard Harshaw <rharshaw2@xxxxxxx> wrote:

> Wonderful image, Chris!
>
> I suppose that if we know it is a 40-minute exposure with 5-minute
> sub-frames, it would be possible to calculate the comet's tangential
> displacement and then, knowing the ephemerids, compute the true space
> velocity... but I don't feel that ambitious today.
>
>
> Richard Harshaw
> Cave Creek, AZ
>
>
> -----Original Message-----
> From: az-observing-bounce@xxxxxxxxxxxxx
> [mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Chris Schur
> Sent: Thursday, February 26, 2009 2:57 PM
> To: Rik Hill; Az Observng list; gallery@xxxxxxxxxxxxxxxxxxx; Jerry Bonnell
> APOD; Joe Orman; Wayne Johnson; Albert Levy; John O'Farrell; Thelma/John
> Ofarrell; Rich Jacobs; Robert Nemiroff APOD
> Subject: [AZ-Observing] Comet Lulin this morning
>
> Here is my shot of comet Lulin at its peak brightness this morning, rapidly
> approaching Regulus, it is moving very fast and can be seen streaking past
> the colorful stars:
>
> http://www.schursastrophotography.com/xtiastro/lulin022609.html
>
>
> Comments?
>
> Chris
>
>
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