ВНИМАНИЕ! На форуме начался конкурс - астрофотография месяца ИЮЛЬ!
0 Пользователей и 2 Гостей просматривают эту тему.
Что сейчас с сайтом SOHO? Не могу посмотреть новые снимки
" J. N. Marcus, St. Louis, MO, U.S.A., writes: "Considerable sublimation of submicron-size silicate dust grains can be expected to occur in the coma and tail of comet C/2012 S1 near perihelion, if its behavior is similar to that of sungrazing comet C/2011 W3 (Lovejoy), whose nucleus survived for a few days beyond perihelion (see Sekanina and Chodas 2012, Ap.J. 757, 127). If C/2012 S1 can survive until its perihelion passage, then its brightness, based upon my preliminary photometry of C/2011 W3 in the SOHO LASCO C3 and C2 coronagraph fields, should start to fall below any power-law formula at about r = 0.1 AU (Nov. 27.8 UT), peak at magnitude -1 to -3 at r = 0.03-0.04 AU (Nov. 28.5-28.6), and then decline by 2 or more magnitudes by the time of perihelion passage on Nov. 28.8 (details of my study of photometric behavior of near-sun comets will be submitted to the ICQ soon). Thus, a strong falloff in brightness at these times should not necessarily be construed as disintegration of the nucleus. After perihelion, the comet's brightness would temporarily increase as submicron grains re-populate the coma and dust tail."
Переведите кто-нибудь, пожалуйста
SOHO LASCO C2
Ссылку можно где свежие снимки берёте?
в перигелии скорость будет равна (почти будет равна?) второй космической для Солнца?а какой будет?