此次流星雨月亮反照率为4%，约-6等，流星雨辐射点距离太阳约90度，距离月球约80度。辐射点大约22点至23点进入西南地平线下（越往南观测越佳，南半球观测最佳）。此流星速度慢，流星明亮。
*****************************************************
国际流星组织的信息：北京时间4月23日18时30分船尾座π流星雨极大，极大值为ZHR=可变.（或可能在40上下）
爱尔兰阿马山天文台信息：今年爆发的可能性较小，上次爆发1982年ZHR为3000-4000.下次较大爆发可能在2054年ZHR约为20-30.
********************************************
4月23日船尾座π流星雨全球各地观看情况表（表格中数字单位为ZHR估计值）
不稳定
*******************************************
当日有关天气预测：
晴天钟
中国天气网：http://www.weather.com.cn/forecast/index.shtml
*************************************** 当日有关人造卫星事件查询： ************************************** 当日有关天象： 4月23日 02时32分，木星合月，木星在月亮之南2.4°
4月23日 3时，水星合天王星，水星在天王星之南2.0° 4月23日 18时30分，船尾座π流星雨极大（ZHR-可变.） 4月23日 21时25分17秒，谷神星过远地点3.85171 AU ***************************************** 详情： 国际流星组织： Active: April 15—28; Maximum: April 23, 10 h30 m UT (λ⊙ = 33.5°);
ZHR = periodic, up to around 40;
Radiant: α = 110°, δ = –45°; Radiant drift: see Table 6;
V ∞ = 18 km/s; r = 2.0;
TFC: α = 135°, δ = –55° and α = 105°, δ = –25° (β < 20° N).
Activity has only been detected from this source since 1972, with notable, short-lived, shower maxima of around 40 meteors per hour in 1977 and 1982, both years when its parent comet, 26P/Grigg-Skjellerup was at perihelion. Before 1982, little activity had been seen at other times, but in 1983, a ZHR of ?6?5 13 was reported, perhaps suggesting material has begun to spread further along the comet's orbit, as theory predicts. Comet Grigg-Skjellerup's most recent perihelion in 2008 March produced nothing meteorically significant that April, but lunar circumstances in 2008 were poor, and faint-meteor activity (which was predicted as likely in advance) could have been missed. There were no predictions for activity in 2012 when this Calendar was prepared. The π–Puppids are best-seen from the southern hemisphere, with useful observations mainly practical there before midnight, as the radiant is very low to setting after 01h local time. April's new Moon creates perfect viewing circumstances this year. Covering whatever happens is important, even if that is to report no obvious activity, as past datasets on the shower have typically been very patchy. So far, visual and radio data have been collected on the shower, but the slow, sometimes bright nature of the meteors makes them ideal subjects for imaging too. No telescopic or video data have been reported in any detail as yet. 香港天文学会： 相關流星群 ：船尾座π流星雨 (PPU)
出現日期 ：4月15日至4月28日
極大日期(香港時間)：4月23日(星期一)18時18分
月閃高峰期 ：早0.6小時
天頂每時出射率 ZHR：3 顆
速度 ：每秒 18千米(低速)
亮度指標 ：2.0(明亮)
輻射點 (曆元 2000)：赤經 時/110°赤緯 -45°
爱尔兰阿马山天文台信息：
[size=-1]to the list of predictions
Fig. 1. Space-temporal projection of pi-Puppids trails parts onto their minimal distance passages dirung the period 22.01.2010-22.07.2012 (correspondence between colours of the particles and their ejection velocities can be seen here).
Fig. 1. Detailed space-temporal projection of pi-Puppids trails parts onto their minimal distance passages dirung the period 22.01.2012-22.07.2012 (correspondence between colours of the particles and their ejection velocities can be seen here).
No encounters with trails are found. Activity is not expected.
References
1. "Comet's dust 2.0" program by S. Shanov and S. Dubrovsky. [Used for computation of stream particles orbital evolution]
2. Kazuo Kinosita, http://www9.ocn.ne.jp/~comet/index.html [Orbital elements of the comet 26P Grigg-Skjellerup.]
3. Lyytinen E, van Flandern T. "Predicting the strength of Leonid outbursts", 2000, Icarus, P. 158-160.
原文http://user.qzone.qq.com/446469755/blog/1333608344
| 
,当Kp指数达到6或以上时，我国境内有可能观察到极光；当前极光活动水平
，极光为9时漠河可能见极光，
级，当地磁暴级别达到G2或以上时，我国境内有可能见极光
置顶卡
变色卡
千斤顶
显身卡
零度星系好敬业啊，半年了。