Meteor Activity Outlook for February 27-March 5, 2010
February 26, 2010 31 Comments
The Meteor Activity Outlook is a weekly summary of expected meteor activity written by Robert Lunsford, Operations Manager of the American Meteor Society and contributor to this blog. The original unedited version of this week’s Meteor Activity Outlook can be found at the American Meteor Society’s site.
March is the slowest month for meteor activity. No major annual showers are active and only two very weak minor showers produce activity this month. The sporadic rates continue a slow decline as seen from the mid-northern latitudes and mid-southern rates reach a first half minimum. There is not much to look forward to this month expect for the evening fireballs that seem to peak this time of year from the northern hemisphere. This could be due to the fact the antapex radiant lies highest above the horizon this time of year during the evening hours.
During this period the moon reaches its full phase on Sunday February 28th. At this time the bright moon will be in the sky all night long making meteor observing difficult at best. As the week progresses the moon will rise later and later in the evening offering a few hours of dark sky between the end of evening twilight and moonrise.The estimated total hourly rates for evening observers this week is ~1 for those in the northern hemisphere and ~2 for those south of the equator. For morning observers the estimated total hourly rates should be ~5 from the northern hemisphere and ~7 as seen from the southern hemisphere. The actual rates will also depend on factors such as personal light and motion perception, local weather conditions, alertness and experience in watching meteor activity.
The radiant positions and rates listed below are exact for Saturday night/Sunday morning February 27/28. These positions do not change greatly day to day so the listed coordinates may be used during this entire period.
The full descriptions of each active meteor shower will continue next week when the moon becomes less of a nuisance to observers.
The list below presents a condensed version of the expected activity this week. Rates and positions are exact for Saturday night/Sunday morning.
Shower Name RA DEC Vel Rates km/s NH SH ANT Antihelions 11h 28m +02 30 1 1 GNO Gamma Normids 15h 44m -52 56 <1 <1 RA - Right Ascension DEC - Declination Vel - Velocity relative to Earth (in km per sec) Rates - Rate of visible meteors per hour from a dark site NH - Northern Hemisphere SH - Southern Hemisphere