New comet in Bootes = 73P/Schwassmann-Wachmann

73P/Schwassmann-Wachmann was "discovered" by the ASAS Alert System on Mar, 16, 2006 on the image taken on Mar 15, 2006 at position (14:16:17 +15:23.5). More images were taken on Mar 16, and several prediscovery images were identified on Mar 14, Mar 12,09,06 and 03.
Unfortunately MPChecker does did not recognize ASAS observations as corresponding to 73P, so me have issued false alert. Sorry!:

MPChecker

Here are the results of your search(es) in the requested field(s):

No known minor planets, brighter than V = 15.0, were found in the 15.0-arcminute region around R.A. = 14 16 17, Decl. = +15 23.5 (J2000.0) on 2006 03 15.28 UT.

Explanatory Notes

The positions are J2000.0 and are "quick look" positions designed for
identification, not the rigorous comparison of observations with theory.
Offsets, intended for use by supernova hunters, are given in arc-minutes
as the coordinates of the parent galaxies are rarely
given to arc-second precision.
The motions are in arcseconds per stated time unit.
Right-ascension motions include the cos(Decl.) term.
The brief orbit descriptor is either:
- the number of oppositions (if marked with `o'),
- the arc-length in days (if marked with `d') or
- `V' if it is a Generalized Väisälä solution.
Comets are listed regardless of how faint they are. No magnitude
estimates are supplied for comets. The heliocentric distance, r,
is displayed in the Comments column. Most comets more than 5 AU
from the sun will be beyond the reach of most observers, but the
information is displayed to enable identification should an outburst
occur.

"Discovery" image: 15/03/2006, RA,DEC: 14:16:17 +15:23.5
Prediscovery images: 03/03/2006, RA,DEC: 14:00:29 +13:14.7	06/03/2006, RA,DEC: 14:04:24 +13:43.1	09/03/2006, RA,DEC: 14:08:20 +14:14.1	12/03/2006, RA,DEC: 14:12:18 +14:47.4	14/03/2006, RA,DEC: 14:14:55 +15:10.9
Later images:
16/03/2006, RA,DEC: 14:17:36 +15:35.9