2011年的流星雨
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发布时间：2022-07-03 02:47
共3个回答
热心网友
时间：2023-11-01 06:27
年初的象限仪、6月底的六月牧夫、12月中旬的双子和12月底的小熊比较有看点。英仙被极大时间和十四的大月亮毁了。狮子一如既往的不靠谱。
象限仪
Quadrantids (QUA)
Active: December 28 – January 12; Maximum: January 4, 01h10m UT (λ⊙ = 283.16°);
ZHR = 120 (can vary ∼ 60–200);
Radiant: α = 230°, δ = +49°; Radiant drift: see Table 6;
V∞ = 41 km/s; r = 2.1 at maximum, but variable;
TFC: α = 242°, δ = +75° and α = 198°, δ = +40° (β > 40° N).
IFC: before 0h local time α = 150°, δ = +70°; after 0h local time α = 180°, δ = +40° and
α = 240°, δ = +70° (β > 40° N).
预报极大为北京时间（下同）1月4日上午9:10，
但在4日凌晨5点到14点都有可能看到较大流量
所以标准观测非常重要。
1月4日为初一，所以完全没有月光干扰。
则北京地区最佳观测时间是1月4日天亮前，即6:30以前。
由于峰值持续时间可能很短，所以最好有多位同好合作将整个后半夜时间无缝覆盖！
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宝瓶座η
η–Aquariids (ETA)
Active: April 19 – May 28; Maximum: May 6, 13h UT (λ⊙ = 45.5°);
ZHR = 70 (periodically variable, ∼ 40–85);
Radiant: α = 338°, δ = −01°; Radiant drift: see Table 6;
V∞ = 66 km/s; r = 2.4;
TFC: α = 319°, δ = +10° and α = 321°, δ = −23° (β < 20° S).
这个流星雨今年也不受月光影响，预报ZHR高达70。
不过预报极大在5月6日晚21点，我国没法观测。
当天4点天亮，辐射点在天亮前2小时左右升起。
不太适合普通爱好者欣赏，适合专业爱好者做标观。
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六月牧夫
June Boötids (JBO)
Active: June 22 – July 2; Maximum: June 27, 21h UT (λ⊙ = 95.7°), but see text;
ZHR = variable, 0–100+;
Radiant: α = 224°, δ = +48°; Radiant drift: see Table 6;
V∞ = 18 km/s; r = 2.2;
TFC: α = 156°, δ = +64° and α = 289°, δ = +67° (β = 25°–60° N).
预报极大在6月28日凌晨5点，当天北京地区4点前天就亮了。
6月27日是农历廿六，残月基本不影响观测。
ZHR很不稳定，可能从0到100多，值得专业爱好者标观。
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英仙
Perseids （PER）
whose maximum is e sometime between ∼ 01h–13h30m UT on August 13, perhaps highest near 06h UT。
预报ZHR为100，峰值在8月13日9点～21:30之间
最有可能出现在14点，这在我国基本还是下午。
8月13日是农历十四，巨大的月亮。
所以可以预计今年欣赏性很差，专业爱好者可以在当天天黑后监测数小时。
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天龙
Draconids (DRA)
Active: October 6–10; Maximum: October 8, various potential timings – see below;
ZHR = periodic, up to storm levels;
Radiant: α = 262°, δ = +54°; Radiant drift: negligible;
V∞ = 20 km/s; r = 2.6;
TFC: α = 290°, δ = +65° and α = 288°, δ = +39° (β > 30° N).
爆发可能达到暴雨量级，但很不确定。
今年预报极大在10月8日，当天是农历十二，后半夜值得专业爱好者监测。
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猎户
Orionids（ORI）
The major Orionids should reach maximum on October 21, with a last quarter Moon that may be more of a nuisance than a true deterrent to observers.
ZHR预报为25，每年都有稳定的表现。
今年极大预报为10月21～22这个晚上，廿五的月亮一定程度影响后半夜观测。
所以还是只推荐专业爱好者监测。
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狮子
Leonids (LEO)
Active: November 6–30; Maximum: November 18, 03h40m UT (nodal crossing
at λ⊙ = 235.27°), but see below; ZHR = 20+?;
Radiant: α = 152°, δ = +22°; Radiant drift: see Table 6;
V∞ = 71 km/s; r = 2.5;
TFC: α = 140°, δ = +35° and α = 129°, δ = +06° (β > 35° N);
or α = 156°, δ = −3° and α = 129°, δ = +6°(β < 35° N).
IFC: α = 120°, δ = +40° before 0h local time (β > 40° N);
α = 120°, δ = +20° before 4h local time and α = 160°, δ = 0° after 4h local time (β > 0° N);
α = 120°, δ = +10° before 0h local time and α = 160°, δ = −10° (β < 0° N).
狮王是每年都要关注的。今年预报极大在11月18日11:40。
当天农历廿三，所以仍然欣赏性较差。
专业爱好者可以在11月18日凌晨顶着下弦月监测。
另外，每年的狮王都会有些特殊状况：
Jérémie Vaullon has indicated part of the 1800 AD st trail may be encountered around 22h36m UT on November 16, and could proce ZHRs of ∼ 200. Unfortunately, the st particles involved are expected to be exceptionally small, of order 10–100 microns, and this could mean no optically-detectable meteors at all. This activity may be observable instead as an increase in underdense radio meteor echoes, by those systems capable of recording the equivalent of such 'invisibly-faint' meteors, and by sensitive radar meteor systems. Mikhail Maslov has proposed that there may be two peaks, one on November 17, around 21h UT, when ZHRs may be ∼ 5–10 above the underlying 'normal' activity, the second on November 18 near 23h UT, with ZHRs of ∼ 10 above normal. Taking the typical ZHR to be ∼ 10–15 could suggest ZHRs at either might be ∼ 20 ± 5. The second peak he noted may proce somewhat fainter than average meteors, however. Another potential maximum time is that given above for the nodal crossing, when ZHRs are liable to be simply 'normal'.
简单说，有人认为11月17日凌晨6:36前后地球会遭遇1800年的团块
ZHR可能高达200，但由于这些团块很小，所以可能都是肉眼不可见的流星
适合无线电观测和高光敏摄像器材观测
另外有人认为18日凌晨5点和19日清晨7点会有些小峰。
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双子
Geminids (GEM)
major Geminids (December 14, probably between 01h–22h UT)
预报极大在12月14日9点～15日6点，所以适合14～15日这个晚上长时间监测。
预报ZHR仍然为120。当天是农历二十，不过双子雨即使顶着亏凸月也很有欣赏价值。
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小熊
Ursids (URS)
Active: December 17–26; Maximum: December 23, 02h UT (λ⊙ = 270.7°), but see below;
ZHR = 10 (occasionally variable up to 50);
Radiant: α = 217°, δ = +76°; Radiant drift: see Table 6;
V∞ = 33 km/s; r = 3.0;
TFC: α = 348°, δ = +75° and α = 131°, δ = +66° (β > 40° N);
α = 063°, δ = +84° and α = 156°, δ = +64° (β 30° to 40° N).
预报极大为12月23日11点，ZHR为10，但有可能高达50。
当天没有月光干扰，辐射点在北京地区终年不落，
适合专业爱好者在23日凌晨进行监测。
参考资料：www.imo.net
热心网友
时间：2023-11-01 06:27
热心网友
时间：2023-11-01 06:28
