The estimated total hourly meteor rates for evening observers this week is near 2 for those viewing from the northern hemisphere and 3 for those located south of the equator. For morning observers the estimated total hourly rates should be near 5 as seen from mid-northern latitudes (45N) and 7 as seen from tropical southern locations (25S).
During this period the moon reaches its first quarter phase on Monday June 10th. At this time the moon is located 90 degrees east of the sun and sets near 0200 local daylight saving time (LDST). As the week progresses, the waxing gibbous moon will set later in the morning with each passing night, reducing the window of dark skies available.
June is another slow month for meteor activity. There are no major showers active in June and only the Anthelion source can be counted on for continuous activity. Sporadic rates continue to remain slow as seen from the mid-northern hemisphere (45 N) with only half the rates seen from the southern hemisphere. As seen from the southern tropics (25 S) sporadic rates continue to be strong this month with morning hourly rates exceeding 10.
During this period the moon reaches its last quarter phase on Sunday May 26th. At this time the half-illuminated moon rises between 0200 and 0300 local summer time (LST) and remains in the sky the remainder of the night. As the week progresses the moon will become less of a factor as it wanes and rises later with each passing night.
During this period the moon reaches its full phase on Saturday May 18th. At this time the moon lies above the horizon all night long, making meteor observations difficult at best. As the week progresses the moon's phase will wane and it will rise later each night. This will provide some dark skies between dusk and moon rise but unfortunately this is a very slow time for meteor activity.
During this period the moon reaches its first quarter phase on Saturday May 11th. At this time the half-illuminated moon is present in the evening sky and does not set until 3-4am as seen from mid-northern latitudes. As the week progresses the window of dark skies between moonset and dawn will shrink until it disappears by Wednesday May 15th.
During this period the moon reaches its new phase on Saturday May 4th. At this time the moon is invisible at night and poses no problems to meteor observers. As the week progresses the slender crescent moon will enter the evening sky but will set long before the more active morning hours arrive.