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SDAs zip along ~twice as fast as alpha Caps and tend to be fainter. The best time to look is during the hours around midnight when the shower's radiant may be found in the southern sky beautifully bracketed by Jupiter and Saturn: sky map.īonus: Another meteor shower, the southern Delta Aquarids (SDAs), also peaks in late July, sending streaks of light from the same general part of the sky. Watch for them in the nights ahead slowly spilling out of the constellation Capricornus. If they're right, every alpha Capricornid we see today heralds a storm to come. "Rates will increase dramatically in the 23rd and 24th centuries to a peak of ZHR = 2200/hr on an annual basis, half the visible shower peak rate during the 1999 Leonid storm." "In the next 300 years, the alpha Capricornids are likely to grow into a major annual shower," they write in an article in the Astronomical Journal. Since then, the debris has been drifting toward Earth. They believe it resulted from a major fragmentation event ~5000 years ago when as much as half of the original comet disintegrated. Researchers Peter Jenniskens (SETI Institute) and Jeremie Vaubaillon (Paris Observatory) have studied the alpha Capricornid debris stream. This is a minor shower today, but in the not-too-distant future, it could turn into a regular meteor storm. Many "alpha Caps" are slow, bright fireballs. They appear every year in late July, peaking around the July-August boundary with 5 to 9 meteors per hour.
#Rt cosmic brush 309 tv
The soundtrack is a 54.309 MHz digital TV signal reflected from the fireball's ionized trail.Īlpha Capricornid meteors are debris from Comet 169P/NEAT.
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"It was magnitude -11, about as bright as a waxing gibbous Moon." Next: Turn up the volume. "This is a probable alpha Capricornid," says Ashcraft, who operates an automated meteor camera in rural New Mexico. Consider this fireball, recorded by Thomas Ashcraft on July 21st, a preview of things to come: Aurora alerts: SMS Text.ĪLPHA CAPRICORNID METEOR SHOWER: Today, meteor storms are rare, but a few hundred years from now they could be commonplace. High-latitude sky watchers should be alert for auroras mixed with bright moonlight on July 23-24.
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NOAA forecasters say the glancing blow could spark minor G1-class geomagnetic storms. Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining-a result of the yin-yang relationship between the solar cycle and cosmic rays.ĬHANCE OF MINOR STORMS TODAY: Later today, a CME might sideswipe Earth's magnetic field. Credit: SDO/HMIĬosmic Rays Solar Cycle 25 is beginning, and this is reflected in the number of cosmic rays entering Earth's atmosphere. For the first time in many years, there are 6 numbered sunspot groups on the face of the sun.