Quick ISON Update: Is It Still There?


Posmatranja sa Habbla u infrcrvenom spektru ukazuju na drastične promijene u strukturi komete kako se pribliava perihelionu.

A report has just come in from Michal Drahus, a postdoctoral astronomer at Caltech, saying that far-infrared observations of the comet show a sudden drop in light emitted by certain kinds of molecules (specifically HCN embedded in ice), while others are reporting that, at roughly the same time, the comet has apparently blasted out a lot of dust. This is not yet confirmed, but a possible explanation is that the comet disrupted.
Veliko je pitanje dali će ISON preivjeti perihelion ili će nestati poput Schwassmann-Wachmann 3 iz 2006 godine (vidi sliku).





Hi All,

Comet ISON has been closely monitored at the IRAM millimeter telescope in
Spain by Israel Hermelo (IRAM Granada) and myself (Caltech/NRAO) for the
last 6 days. We observe consistent, rapid fading of the molecular emission
lines between Nov. 21 and Nov. 25 by at least a factor of 20 (likely
more). This may indicate that the nucleus is now at best marginally active
or that... it no longer exists.

Regards,
Michal

http://groups.yahoo.com/neo/groups/c...s/topics/22461



Bad news indeed!!!