Re: Possibility of JWST flares and antiflares?

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 5 Jan 2022 22:51:30 +0100
Hi Allen,

On Wed, Jan 5, 2022 at 10:25 PM Allen Thomson via Seesat-l
<seesat-l_at_satobs.org> wrote:
> Are there any analyses of the possibility that the shiny JWST sunshade in its SEL-2 halo orbit will produce flares? Or, somewhat like Lacrosse 5, antiflares?

This is a great question! I think it is entirely possible for the
sunshade to reflect sunlight back to Earth. As the sunshade is fixed
to the telescope, whether the reflections reach Earth will depend on
the location of JWST in its SEL2 orbit, as well as its pointing
direction. This page shows that it can target angles from 85 to 135
deg away from the sun:
https://jwst-docs.stsci.edu/jwst-observatory-characteristics/jwst-observatory-coordinate-system-and-field-of-regard/jwst-target-viewing-constraints

Given that the orbit should be relatively well known, as well as the
schedule of targets and hence pointing directions, flare for different
locations on Earth may well be predictable.

Regards,
    Cees
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Received on Wed Jan 05 2022 - 15:52:41 UTC

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