LASCO Activity Report for
December 19, 2005 SOHO Science Daily Meeting

Event times are first frame seen in C2 camera unless otherwise noted.
These are preliminary observations for the daily SOHO science discussions.
Final analysis is reported on the Lasco CME list.
An archive of these reports is available.

Points Of Interest

KEYHOLE Operations: 
   Dec 3 - Dec 20 (26 m)
   Dec 6 - Dec 17 (34 m)
   
Spacecraft Maneuvers on December 15: Station keeping (SK), Momentum
Management (MM), and 180 deg Roll. Therefore:

- On Wednesday Dec 14, 22:00 UT: Lasco C2 and C3 closed doors for 
maneuvers.

- On Friday Dec 16, 22:00 UT recover C2 and C3, opened doors and resumed 
keyhole observations: C2 @ 12 min cadence, C3 @ 30 min cadence, daily 
orange/blue filter fieldings, and daily orange filter pB sets.

EIT ended bakeout Sunday Dec 18 (started on Dec 02 @ ~ 18:12 UT) from 
plan at ~ 10:00 UT. The post cal mini set were then taken. Imaging 
resumed at ~21:00 UT.

2005/12/16 (Friday)

	First C2 image after Maneuvers on 2005/12/15: 22:30 UT
	First C3 image after Maneuvers on 2005/12/15: 22:34 UT

22:48 UT  W Limb	Ragged loop front with twisted (rather circular) inner
			structure already under development after reopening
			doors. Gusty outflow afterward all along the next day.

2005/12/17 (Saturday)

04:12 UT  N East	Faint and narrow front precedes the development of a
			brighter and ragged loop front, first seen at 05:36 UT.
			By 06:24 UT, very faint extensions can be seen above
			the N and S Poles. The extensions seem to fully surround
			the C2 occulting afterward. However, they are too faint
			and cannot be discerned at all in the C3 FOV. No X-ray
			activity was reported by GOES on the eastern hemisphere.

13:12 UT  N East	Extremely faint ragged front precedes the development
			of a brighter and ragged loop front that starts to be 
			seen at 14:24 UT. Extremely faint extensions seem to
			develop then above the N Pole. The ragged loop front
			fades throughout C3.

2005/12/18 (Sunday)

02:24 UT  E Limb	Elongated loop front that fades throughout C3.

02:48 UT  NN West	Difuse brightening just appearing develops as a ragged
			front. Faint and diffuse extensions develop by 03:00 UT
			on NW, noving faster and spanning all the way up to
			past the S Pole (clockwise). Difficult to say whether
			these extensions are related or not to the ragged front
			on NNW. By 05:48 UT on, an extremely faint and 
			asymmetric front seems to develop in the C3 FOV from 
			the W limb up past the S Pole, quickly fading afterward.

03:00 UT  S East	Slow development of a system of faint and expanding
			loop fronts. Difficult to give an exact time of first
			appearance. By ~ 14:36 UT, a new loop system seems to 
			start pushing from behind. 

13:12 UT  EN East	Bright and elongated loop front. Very faint and diffuse
			expanding front by 13:36 UT. Kind of reconection
			type event in the trail of the elongated loop front 
			(front that fades close to the inner edge of C3).

18:34 UT  W Limb	Much gusty outflow starts to be discerned that then
			superposes in the LOS with the development of an
			apparently twisted structure.

18:34 UT  EN East	Very faint and ragged front that fades close to the 
			inner edge of C3.

22:06 UT  EN East	Another faint front.

2005/12/19 (Monday)

02:50 UT  EN East	Bright and elongated loop front with faint extensions
			toward N. Small ragged fronts develop on SE plus a
			faint loop front on ESE.

Last image analized taken at 08:26 UT (C2 time).