Photographing Iridium Flares - Oops!

From: Anthony Ayiomamitis (
Date: Sat Mar 24 2001 - 11:53:22 PST

  • Next message: Anthony Ayiomamitis: "Photographing Iridium Flares - Addendum"

           My apologies to the group for inadvertently including a complete mail digest
    with my earlier message. Excitement got the better of me!
    Anthony Ayiomamitis wrote:
    > Greetings,
    >      I would appreciate input on photographing Iridium flares which are
    > visible during the day and night. I have a daytime opportunity on Mar
    > 26/01 (magnitude -8.0!) and would like to capture it on film. My camera
    > is currently loaded with ASA 400 Fuji print film. I would like to know
    > the focal length of the lens I should be using (I have Canon FD lenses
    > ranging from 24 mm wide angle to 300 mm wide angle) as well as the
    > length of exposure.
    >      In addition, will telescope tracking be required to offset field
    > rotation or will the satellite be stationary? Of course, if tracking is
    > necessary, this cannot be done prior to the flare (since it is during
    > daylight hours) and will have to be looked after the previous night.
    >      I would also appreciate feedback on photographing flares during the
    > night and, more specifically, the type of exposures I should be looking
    > at. I have three such flares in my region during the next 48 hours
    > ranging in magnitude from -1 to -5.
    >      As a final comment, can I assume that the length of exposure will
    > be a function of magnitude? If so, I would love to see some feedback on
    > exposure times (daylight and night time) as a function of magnitude.
    >      Many thanks in advance for any input and assistance. If things do
    > pan out, I promise to inform everyone with links to photos.
    > Anthony.
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