Dátum: 2000. május 25., 21:01
Feladó: Tuboly Vince --
Tárgy: 1999S4 LINEAR
Sziasztok!
Egy friss észlelés a nagy nyári üstökösről. Meghagyom angolul, igy is
kibogozhato a lényeg.
Am.csill.üdv.: Tuboly Vince
2000 May 15.60 UT: m1.6, Dia.=1.6', DC=3 ... 20cm L (70x) ...Mike Linnolt
(Haleakala NP, Maui, HI) [From Mike Linnolt's e-mail:...early Monday
morning, I made my first attempt at recovering S4. Despite the very low
altitude (6 deg) and that moonset coincide with beginning of astronomical
twilight, I was amazed to see it fairly easily in my 20cm scope. (Observing
from the summit of 10,000' Haleakala with its sea surface horizon, probably
made the crucial difference.) Anyway, it has brightened about 2 mag, and
increased its diam about 50%, since my last observation in March. The next 2
weeks will see constant interfering moonlight, despite its greater altitude,
but hopefully more observations will start to appear. (Note: due to the very
low altitude and extinction issues, I carefully chose the comparison stars
TYC 1763 489 1 mag.69 and SAO 75059 mag=9.23, within a few arc min of the
same altitude as the comet.)]