I've been away since this morning, so I didn't have a chance to correct a typo in my earlier email regarding the Perseids until now. I entered "ZHR" (zenithal hourly rate) when I meant "OHR" (observed hourly rate). Sometimes my fingers are much faster than my brain - and gaining speed all the time. BTW, does anyone know the conversion formula to calculate ZHR from OHR? Regarding the Perseids further: I will probably try the old Skyline Drive site because it is much closer to me. Anyone up for the drive (about two hours from SLC) is welcome to join me. Weather permitting, of course. And, if the weather is good, I plan to take advantage of both Saturday and Sunday nights observing without a Moon. Kim -----Original Message----- From: utah-astronomy-bounces+kimharch=cut.net@mailman.xmission.com [mailto:utah-astronomy-bounces+kimharch=cut.net@mailman.xmission.com] On Behalf Of Kurt Fisher Sent: Monday, August 06, 2007 1:16 PM To: utah-astronomy@mailman.xmission.com Subject: RE: [Utah-astronomy] Perseids on August 12-13 Ann, When an observer is not directly under a meteor shower's radiant, they see less than the max zenithal hourly rate. The maximum predicated activity is a zenthal hourly rate of 100 per hour - or once every 30 seconds - if you are standing right under the shower radiant at the peak. For Utah, that will not occur. When the peak of the shower occurs, the radiant of the shower (see map) will be low in the northeast sky. The lower radiant altitude means that you will see a proportionally lower rate of meteors. [clipped] No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.6/938 - Release Date: 8/5/2007 4:16 PM