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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References in periodicals archive ?
To find it in the night sky, imagine a triangle formed of Ursa Major, Ursa Minor and the Quadrantid as the bottom point.
Major Meteor Showers in 2016 Morning Radiant Peak rate, ideal Name of peak location conditions * Quadrantids Jan.
KUWAIT, Jan 4 (KUNA) - The Quadrantid meteors to be seen today and tomorrow
8[degrees]S) 04 09:23 Quadrantid Shower (ZHR = 120) 05 05:59 Earth at perihelion (0.
EST; look for Quadrantid meteors from northeast in hours before dawn (from country locations dozens per hour might be seen); Luna 1 becomes the first spacecraft to escape Earth's gravity, this day in 1959.
9) If the falling down of meteorites or passing through of meteors (the light phenomenon caused by meteorites; in early texts, liu-hsing [CHINESE TEXT NOT REPRODUCIBLE IN ASCII] seems to be used for both) is more than symbolic, this may be a reference to the Geminid, Ursid, or Quadrantid showers that reach their maxima in mid-December and early January.
3-10 aboard Celebrity Cruises' Galaxy not only will give passengers a chance to view the Quadrantid meteor shower but allow some passengers to have a star named after them.
3, 1982 -- just the time when the Quadrantid, an annual high-latitude meteor shower, passed through the atmosphere.
THE SAME WANING gibbous Moon that interferes with the Quadrantid meteor shower offers a spectacle the very next night.
The Quadrantid Meteor Shower is expected to be most visible on the nights of Jan.
An exception is the Quadrantid shower of early January, named for the defunct constellation Quadrans Muralis, now part of Bootes.
The Quadrantid meteor shower occurs when the Earth passes through a stream of debris from the comet.