LASCO Activity Report for
December 21, 2004 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

Bright non-group comet entered the C3 FOV on 2004/12/16 at 04:42 UT from
the right hand edge (above the equatorial plane). It shows a fairly nice tail.
Still in the C3 FOV (upper left quadrant).

- Telemetry Keyhole # 7: 2004/12/13 - 2004/12/29 (intermittent contact).

- Spacecraft Maneuvers on 2004/12/21 (Tuesday). Therefore, LASCO will be 
  closing for the S/C maneuvers (Station keeping, Momentum management, and
  180 deg roll) between Dec. 20 (21:00 UT) - Dec 23 (~ 20:45 UT).

- EIT pre-bake cals taken on Saturday 2004/12/11 between 15:24-18:30 UT. The 
  CCD bakeout started at 18:47 UT. The end of the bakeout will be on 2004/12/28
  at 10:00 UT. Therefore, no EIT images during that period.

- During the Keyhole, LASCO is observing with DSN gap recording availability
  thanks to the FOT and the SOCs hard work. C2 and C3 observes at a 
  standard synoptic plan of C2 at 10 minute cadence and C3 at the 30 minute
  cadence with the daily pB and flat field images.

2004/12/20 (Monday)

00:36 UT  N West	Jet-like front.

01:48 UT  ES East	Faint and diffuse spray-like front.

	04:36 - 08:36 UT	Temporary Data Gap.

	09:48 - 14:48 UT	Temporary Data Gap.

14:48 UT  E Limb	Couple of big ragged loop fronts already under
			development after data gap. One is developing toward
			ESE, already close to the end of the C2 FOV, and the
			other, behind, toward E.

	15:48 - 20:24 UT	Temporary Data Gap.

	LASCO closed doors at 21:00 UT. 
	It will reopen on 2004/12/23 (Thursday) at ~ 20:45 UT.

2004/12/21 (Tuesday)

	S/C Maneuvers. LASCO doors closed today.