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> I have heard once about a photograph of faint pillar of Venus. Planets
and
> stars, except Venus (and maybe Jupiter when it is bright), are too faint
to
> show halos bright enough to detect by naked eye. Pillar and "subsun" of
Venus
> are probably most possible halos produced by any planets or stars.
>
> Well, a really bright supernova propably can show some halos.
In good arctic diamond dust conditions (with crystals sparkling everywhere
near you) its easy to the light pillar caused by bright Venus. Its also
well visible in binoculars and steadily apparent as long as the best
conditions continue. Unlike with the normal cirrus-clouds caused halos the
diamond dust pillars have sharp edges. I have watched Venus pillars in the
beginning of 1980´s a couple of times in best diamond dust conditions, but
Jupiter was not then visible.
There´s quite a good pile of Venus and Jupiter pillar halos in the old
literature, some of them observed during the first and the second world
war.
Then there are less than 5 individual and not so trustworthy reports of
claimed halos, going as far as claiming 22 halo around the
relatively dim Altair (!).
I would be really amazed if these would have any seed of
truth in them. From the best of climate conditions (here: the COLD
CLIMATES) we have none such reports. And as far as I am aware we have
no dynamite proof record of the 22 halo visible around any starlike
object, not even around the bright Venus.
Regards, Marko
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