A Couple of Mid-Summer Meteor Showers
July 2003 :
Note: This article may contain outdated information
This article was published in the July 2003 issue of The Skyscraper and likely contains some information that was pertinent only for that month. It is being provided here for historical reference only.
People spend a lot more leisure time outdoors during the summer
months, so it's no wonder they observe more shooting stars at that
time of year. If you can survive the onslaught of mosquitoes, an early
mid-summer evening can be a great time to view a few meteors blazing
across the sky. And since the August Perseids will be ruined by a Full
Moon next month, and since we haven't seen a decent meteor display for
some time now, I say get out there in July and enjoy whatever meteors
have a fatal close encounter with the Earth's upper atmosphere. Get
ready for the Delta Aquarid and Capricornid meteor showers.
The first meteor shower of July, the Delta Aquarids, peaks on the
evening of the 27th to the early morning of the 28th. New Moon is on the
29th so ideal observing conditions will prevail. At peak time about 20
bright, yellow meteors can be observed per hour. Because these meteors
nearly broadside the Earth, their speed is a moderate 25.5 miles per
second.
To maximize your chances of seeing as many meteors as possible you
must find a dark sky location from which to observe. Shield yourself
from any stray light sources and continually scan the sky. Don't just
stare at one area of the sky. If you can see the cloud-like milky
gauze of the Milky Way from the observing site you choose, then you
can be assured of a decent display of shooting stars.
The second meteor shower you should observe comes a day later on
the night of July 29/30 with the peak of the Capricornid meteor
shower. The Moon will still be New for observing purposes, so it won't
interfere with observing on this night either.
The Capricornids are characterized by their often yellow
coloration and their frequent brightness. They are also slow
interplanetary interlopers, hitting our atmosphere at around 15 miles
per second. Though you can expect only 15 meteors per hour at best
under dark sky conditions, the Capricornids are noted for producing
brilliant fireballs. That's one incentive for watching this meteor
shower.
With both of these meteor showers you can begin observing just
after sunset. July's celestial showers should satisfy your shooting
star cravings until next month's less than favorable Perseid
performance under a Full Moon. Keep your eyes to the skies!