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单词 Delta Aquarids
释义

Delta Aquarids

原声例句
VOA Special 2016年7月合集

After all, the Delta Aquarids meteor shower can be seen in many areas in the night sky this week.

因为本周多个地区都能观赏到宝瓶座流星雨。

中文百科

宝瓶座δ南流星雨 Southern Delta Aquariids

(重定向自Delta Aquarids)

宝瓶座δ南流星雨是出现在7月中旬至8月中旬的流星雨,极大期在7月28或29日,但是母体尚不清楚是哪一颗彗星,头号的候选者是96P/梅克贺兹一号彗星(1994o),但在1994年观测到这颗彗星已经分裂成数块碎片,不过2007年还是回归了。

宝瓶座δ南流星雨的名称来自于它的辐射点位在宝瓶座最亮恒星之一的δ星附近。与宝瓶座δ星相关的流星有两个分支:南支和北支。宝瓶座δ南流星雨是较明显的一支,每小时约可以看见15至20颗的流星,而在极大期时可以达到60颗。平均的辐射点位于赤经 =339°,赤纬 = -17°。宝瓶座δ北流星雨较弱,在8月中旬的后期达到极大期,平均每小时约有10颗流星,平均的辐射点则在赤经 =340°,赤纬 = -2°。

英语百科

Southern Delta Aquariids 宝瓶座δ南流星雨

(重定向自Delta Aquarids)

The Southern Delta Aquariids are a meteor shower visible from mid July to mid August each year with peak activity on July 28 or 29 July. The shower originated from the breakup of what are now the Marsden and Kracht Sungrazing comets.

The Delta Aquariids get their name because their radiant appears to lie in the constellation Aquarius, near one of the constellation's brightest stars, Delta Aquarii. The name derives from the Latin possessive form "Aquarii", whereby the declension "-i" is replaced by "-ids" (hence Aquariids with two i's). There are two branches of the Delta Aquariid meteor shower, Southern and Northern. The Southern Delta Aquariids are considered a strong shower, with an average meteor observation rate of 15–20 per hour, and a peak zenith hourly rate of 18. The average radiant is at RA=339°, DEC=−17°. The Northern Delta Aquariids are a weaker shower, peaking later in mid August, with an average peak rate of 10 meteors per hour and an average radiant of RA=340°, DEC=−2°.

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更新时间:2025/6/18 19:48:06