Quadrantids


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Quadrantids

(kwod-ran -tidz) A major meteor shower, radiant: RA 232°, dec +50°, that maximizes on Jan. 3 when the Sun's longitude is 282.8°. The zenithal hourly rate (ZHR) at maximum is about 90 and is constant from year to year. The meteoroid stream is narrow, the ZHR being greater than half maximum for only 17 hours: the stream's cross-sectional diameter is about 1.7 million km compared with 20 million and 13 million km for those of the Perseids and Geminids. The stream has its ascending node close to the orbit of Jupiter. Owing to gravitational and radiational perturbations the large ‘visual’ meteoroids are in a slightly different orbit to the smaller ‘radio’ meteoroids. The shower is thought to be associated with comet Machholz. It is named after the obsolete constellation Quadrans Murali found in early 19th-century star atlases. The radiant is actually in Boötes.

Quadrantids

 

a meteor shower with a radiant on the boundary between the constellations Bootes and Draco (on star maps in the early 19th century this region was designated by the constellation Qudrans Muralis). The Quadrantids have been known since 1839. They are observed annually at the end of December and in the beginning of January; on January 3–4, the earth passes through the dense central concentration of the Quadrantid meteor swarm in less than 24 hr. The Quadrantid meteor shower is one of the more active showers.

Quadrantids

[kwä′dran·tidz]
(astronomy)
A meteor shower whose radiant-right ascension of 15 hours and declination of +48° is in the constellation Boötes; velocity is 27 miles (43 kilometers) per second, and the strength is medium.
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The Quadrantids shower is a bit different than other meteor showers because instead of the meteors appearing to come from a constellation, they appear to come from the location of a former constellation.
And keep your eyes peeled for the couple of hours around 8pm tomorrow, which is when maximum UK activity for the Quadrantids is due.
Bashir Marzouq, an astronomer at Qatar Calendar House (QCH), said in a statement that the Quadrantids Meteor Showers are very distinctive because of its very high fall rate in the peak which reaches 80 meteors per hour.
The Quadrantid shower in January is also strong, but very brief.
The Quadrantids peak only lasts for a few hours, compared to peaks that can last for a few days for the better known meteor groups.
The next chance for a good show may be the Quadrantids in early January 2014.
The Quadrantids Metor Shower is classed as an above average shower, not as spectacular as last month's.
The Quadrantids are a major shower, Al-Saadoon told KUNA, adding that they
Quadrantids Meteor Shower Scotland's Dark Sky Park in Dumfries and Galloway is the UK's first Dark Sky Park.
You'll get a crash course in three of this coming January's unusual astronomical events, from a partial solar eclipse, the Quadrantids Meteor Shower and Jupiter aligning with Uranus.
Capricorn Dec 23-Jan 20 With a quadrantids meteor shower due tomorrow, it's no surprise that extreme weather conditions will result in the abandonment of all turf racing.