Dátum: 1999. február 4., 17:40
Feladó:
Tárgy: mir
Sajnos valoszinuleg nem kacsa, mert az egyik legfrisseb IAU
Circularban is irnak errol. Bar
itt nem a MIR-rol szol a szoveg...
Circular No. 7104
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge,
MA 02138, U.S.A.
or FAX 617-495-7231
(subscriptions)
or
(science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)
SPACE-MIRROR EXPERIMENT
On Feb. 4, the Russian Znamya-2.5 space-mirror experiment,
attached to the Progress M-40 spacecraft in low-earth orbit, will
be used to illuminate selected nighttime regions of the earth with
reflected sunlight at an intensity of up to 10 times that of the
full moon. The illumination patch is predicted to be 6 km in
diameter and will pass over a given site in about 1 to 2 seconds.
Observatories may wish to take precautions to avoid damage to
equipment and observations. The experiment is scheduled to last
from Feb. 4.482 to 5.092 UT, and announced targets include
Kazakstan, Ukraine, Belgium, Germany, Canada, and the northern
U.S.A. More details of the experiment program are available at
http://src.space.ru/page_30e.htm and
http://www.skypub.com/news/special/znamya.html. A resolution
adopted by the IAU General Assembly in Kyoto in 1997 notes that
the
launch of large, luminous objects in orbit around the earth is
likely to "have deleterious effects on astronomical observations,
[and as] the night sky is the heritage of all humanity, which
should therefore be preserved untouched, . . . the appropriate
authorities [should] ensure that the night sky receives no less
protection than has been given to the world heritage sites on
earth."
Udv: Fidusz